Order Code RL32739
CRS Report for Congress
Received through the CRS Web
Tsunamis: Monitoring, Detection,
and Early Warning Systems
Updated March 15, 2005
Wayne A. Morrissey
Science and Technology Information Analyst
Resources, Science, and Industry Division
Congressional Research Service ˜ The Library of Congress

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Tsunamis: Monitoring, Detection,
and Early Warning Systems
Summary
Recently, some in Congress have become concerned about the possible
vulnerability of U.S. coastal areas to tsunamis, and about the adequacy of early
warning for coastal areas of the western Atlantic Ocean. Those concerns stem from
the December 26, 2004, tsunami that devastated many coastal areas around the
northern Indian Ocean, where few tsunami early warning systems currently operate.
Caused by a strong underwater earthquake off the coast of Sumatra, Indonesia, the
tsunami disaster is estimated to have claimed as many as 300,000 lives. Affected
nations, assisted by others, are pursuing a multilateral effort through the UNESCO
Intergovernmental Oceanographic Commission (IOC) to develop an international
tsunami detection and warning network that would guard coastal populations in the
greater region of the Indian Ocean. Those efforts would coincide with the United
States’ effort to upgrade and expand its tsunami detection and warning network.
Some developed countries bounding the Indian Ocean region already have
operating tsunami warnings systems. However, in some areas of these and
neighboring countries an emergency management infrastructure to receive tsunami
warnings is lacking, which leaves local officials incapable of rapidly alerting the
public to evacuate or to take other safety precautions. Many disaster management
experts assert that an emergency management infrastructure includes not just tsunami
warnings, but also educating indigenous people and visitors about the potential
dangers in the area; clearly communicating evacuation options; and adapting to
potential risks by constructing public shelters, conducting periodic evacuation drills,
and producing tsunami inundation maps guiding future land-use planning.
Some Members of Congress and the Bush Administration have proposed a
tsunami warning network for the U.S. Atlantic seaboard. The Administration’s plan
proposes to spend $37.5 million to expand from six existing deepwater tsunami
detection buoys to a total of 32 for the Pacific and Atlantic Oceans, Gulf of Mexico,
and Caribbean Sea by the end of 2007. The National Oceanic and Atmospheric
Administration (NOAA), which operates the program, estimates initial procurement
costs would be around $24 million, not including out-year funding for operations and
maintenance. Legislation introduced in the 109th Congress would authorize funding
to procure, deploy, and maintain a comprehensive U.S. tsunami early warning
network for the next six years. Like the Administration, some lawmakers consider
an upgraded U.S. system the best means to contribute to a global warning network.
A global warning network could cost millions of dollars for instrumentation and
maintenance, but some suggest the benefits would far outweigh the costs. Others
question whether the risks of tsunamis outside the Pacific Basin justify the
investment. To leverage costs, international science agencies have suggested a global
tsunami early warning network could be built upon ocean data collection systems,
marine weather buoys, tide gage networks, state- and local-run coastal and ocean
observation networks, and global telecommunications networks. A warning network
would be most useful in countries like the United States that have expansive national
emergency management capability. This report will be updated as warranted.

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Contents
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Proposals for International Tsunami Early Warning Systems . . . . . . . . . . . . 2
Challenges . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Proposals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Bush Administration Plan . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Emergency Supplemental Appropriations for FY2005 . . . . . . . . . . . . . 5
Congressional Action . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
U.S. Tsunami Programs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Tsunami Warnings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
U.S. Operations and Research . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Funding for the U.S. Tsunami Warning Program . . . . . . . . . . . . . . . . 12
Related U.S. Programs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Conclusion . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
List of Figures
Figure 1. U.S. Proposal for Tsunami Detection/Warning System . . . . . . . . . . . . 5
Figure 2. NOAA DART Platform . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

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Tsunamis: Monitoring, Detection,
and Early Warning Systems
Introduction
Recently, numerous congressional inquiries have posed questions about the
possibility of tsunamis occurring in U.S. coastal areas; the extent to which these areas
are currently monitored; how tsunamis can be detected; and whether there is a
national capacity to issue evacuation warnings for tsunamis.1 These concerns stem
from the December 26, 2004, tsunami triggered by an underwater earthquake off the
west coast of northern Sumatra in Indonesia. That earthquake was measured at Mw
9.0.2 The ensuing tsunami devastated many coastal areas around the northern Indian
Ocean, and caused and economic upheaval in other areas. International disaster
agencies estimate that as many as 300,000 people may have lost their lives.
On January 5, 2005, the House Science Committee, House Coastal Caucus, and
House Oceans Caucus co-sponsored a briefing organized by the U.S. Geological
Survey (USGS) of the Department of the Interior. The purpose of the briefing was
to consider the possible implications of the Indian Ocean tsunami for the United
States. Experts from USGS and NOAA delivered presentations on the circumstances
surrounding that tsunami disaster, and discussed current capabilities for monitoring,
detection, and early warning around the globe.3
The National Oceanic and Atmospheric Administration (NOAA) of the U.S.
Department of Commerce and various international science agencies have indicated
that there were few, if any, tsunami early warning systems monitoring the Indian
Ocean on December 26, 2004. However, nations bounded also by the Pacific Ocean,
including Australia and Indonesia, had tsunami early warning systems monitoring the
Pacific shores where they perceived the greatest threat.4 Because of the geographic
1 A tsunami is a seismic sea wave (or a series of waves) usually generated by an underwater
earthquake or landslide, but occasionally is caused by volcanic eruption or major landslide
into the ocean. Tsunami is translated from Japanese as “harbor wave”.
2 M , the moment of magnitude, is a way to measure the force of an earthquake’s total
w
seismic energy released as a function of rock rigidity in the fault, the total area of contact
where friction occurs, and the amount of slippage (or displacement). It is used for
earthquakes greater than M8.2 on the Richter scale.
3 Presenters at that briefing included, David Applegate, Science Advisor for Earthquake and
Geological Hazards at the USGS; General David Johnson, Assistant Director of NOAA’s
National Weather Service; Gregg Withee, Assistant Director for NOAA Satellite and
Information Services; and, Eddie Bernard, Associate Director of NOAA’s Pacific Marine
Environmental Laboratory (teleconferencing from Seattle, WA).
4 General David L. Johnson, “NOAA Tsunami and Natural Disaster Information,” Jan. 5,
(continued...)

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CRS-2
proximity of many settlements to where the tsunami was generated, and an inability
to receive tsunami warnings rapidly, some have concluded that for people on
Indonesia’s Indian Ocean shores, emergency communications were useless in many
cases. In other cases, it was found that indigenous people and tourists were not
educated about the possible dangers of tsunamis; they were not aware of the physical
warning signs of an onset of a tsunami; and local officials did not have alternative
procedures for issuing evacuation alerts, if “lifelines” were disrupted, included in
regional emergency plans.5
On January 29, 2005, the House Committee on Science, and on February 2,
2005, the Senate Committee on Commerce, Science, and Transportation, held
hearings about providing expanded tsunami early warning protection for the United
States and its possessions. Legislation recently introduced by Senator Lieberman of
Connecticut (S. 34) and Senator Inouye of Hawaii (S. 50), among others, would
provide for a rapid U.S. response to upgrade existing capacity for warning in the
Pacific, and expand this capacity to the Atlantic, Gulf of Mexico, and Caribbean Sea.
Senator Inouye’s bill is closely aligned with the Administration’s proposal, released
on January 14, 2005, but also addresses social issues such as disaster education and
local emergency preparedness. (See “Congressional Action,” below.)
Although most deadly tsunamis have occurred historically in the western Pacific
Ocean, there are examples of recorded events in the North Atlantic. In 1692, a
tsunami generated by massive landslides in the Atlantic Puerto Rican Trench reached
Jamaica’s coast, causing an estimated 2,000 deaths. In 1775, a tsunami struck in the
eastern Atlantic Ocean on the coast of Portugal, killing an estimated 60,000 people.
More recently, in 1929, a tsunami generated in the Grand Banks region of Canada hit
Newfoundland, killing 51. It was the third lethal tsunami for Canada’s Atlantic
Coast within 150 years.6
Proposals for International Tsunami
Early Warning Systems
Currently, most experts agree that considerable challenges must be overcome
to establish an extensive tsunami early warning network in the Indian Ocean and
elsewhere. In some respects, developed nations that currently have the resources and
capability to establish their own regional emergency management networks have
been able to avoid some of these challenges.
4 (...continued)
2005 House briefing.
5 Lifelines are emergency response services, hospitals, other care facilities, energy and water
delivery systems, telecommunications, and electronic commerce. See U.S. Congress,
Senate, Committee on Commerce Science and Transportation, report on S. 910, the
Earthquake Hazards Reduction Act, S.Rept. 105-59 (Washington, DC: July 30, 1997, p. 3).
6 Statistics on deaths resulting from tsunamis were compiled by CRS from online sources,
and include data from the Tsunami Laboratory of Novosibirsk, NOAA’s National
Geophysical Data Center, the University of Southern California, Tsunami Research Group,
and others. See [http://geology.about.com/library/bl/bltsunamideathtable.htm], visited Jan.
11, 2005.

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CRS-3
Challenges. Few nations would question that development of an international
system with a capability for regional and local tsunami warnings will require
involving many nations with widely varying technological capabilities and financial
resources. Reports indicate that political leaders expect that most of the
responsibility for paying for such a system will likely fall on the wealthiest nations.
The costs of procuring, operating, and maintaining those instruments and platforms,
and the challenge of obtaining international cost sharing, are likely to be the most
critical factors for sustaining a long-term international effort for global tsunami
detection and warning.
International science agencies have called for an inventory of existing global
capacity for tsunami monitoring, detection, and warning systems to use as a baseline
from which to determine what may still be needed for an international warning
network. U.S. policy experts also have suggested that technological challenges and
possible national security issues could arise with a global system, including
multinational sharing of international telecommunication networks and international
standardization for tsunami warning instrumentation on data platforms. In addition,
some intelligence experts suggest that some data collected could be considered
sensitive and perhaps compromising to U.S. or other nations’ intelligence-gathering
operations. Also, the Assistant Director of NOAA Satellite and Information Services
has noted that some nations, including India, maintain proprietary rights to all of their
real-time satellite data. Some of these data, he asserted, could be important for
tsunami detection in the Indian Ocean, and also for post-disaster damage assessment.7
Proposals. On January 6, 2005, the United Nations proposed an international
effort to develop a tsunami early warning capacity for nations bounding the Indian
Ocean. That effort would be led by the UNESCO Intergovernmental Oceanographic
Commission (IOC). Also, Australian, Japan, Thailand, and India have announced
initiatives to monitor their own Indian Ocean coastlines, in addition to providing
humanitarian aid for the region.8 (For information on other types of foreign
assistance proposed for the areas affected by the tsunami, see CRS Report RL32715,
Indian Ocean Earthquake and Tsunami: Humanitarian Assistance and Relief
Operations, by Rhoda Margesson.)
International science ministers finalized plans for a global observing system in
Brussels, Belgium, on February 15, 2004. That system would be the backbone on
which a regional tsunami early warning system for the Indian Ocean would be built.
The United States is not expected to provide details of its commitment to the
internationally sponsored global tsunami early warning network prior to the
convening of the G-8 summit in July 2005. Experts from Indian Ocean countries
affected by the December 26, 2004 tsunami and other countries met at the UN
Interagency Oceanographic Commission (IOC) in Paris, France, March 3-8, 2005, to
plan a coordinated tsunami early warning system for the Indian Ocean and to review
7 Gregg Withee, Jan. 5, 2005 House briefing, by USGS and NOAA.
8 Idem.

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CRS-4
countries’ financial commitments. The Director of the UN International Strategy for
Disaster Reduction (ISDR), chaired the meeting.9
Some Members of Congress proposed development of a “global” tsunami
detection and warning system in the aftermath of the Indian Ocean disaster.
Representative Pallone was the first to call for establishing a tsunami detection and
warning network for the U.S. Atlantic coast, the Gulf of Mexico, and the Caribbean
Sea.10 However, others question whether the risk for a tsunami on the U.S. Atlantic
coast would justify such expenditures. In response, NOAA scientists have asserted
that the Puerto Rican Trench, which is the deepest point in the western Atlantic
Ocean, should be of great concern.11 As noted above, massive landslides and
sloughing have occurred on the North American continental shelf, generating deadly
tsunamis. One U.S. Atlantic coast state, New Hampshire, already has an emergency
contingency plan for tsunamis, and a clearinghouse for information about historical
tsunami disasters.12 Some states on the Pacific coast have had plans in effect for at
least 50 years.
Bush Administration Plan. On January 14, 2005, the White House Office
of Science and Technology Policy (OSTP) announced the Bush Administration’s
plan for an improved tsunami warning and detection system for the United States.13
That plan initially includes procuring and deploying a total of 32 dedicated tsunami
warning and detection buoys by mid-2007, to provide better coverage for tsunami
detection in the Pacific and Atlantic Oceans, Gulf of Mexico, and Caribbean Sea.
(See Figure 1, below.) The President would commit $37.5 million over the next two
years to implement the plan. The Director of OSTP noted the system would
“ultimately include the Indian Ocean.”14 Funding for the President’s proposal would
be sought through emergency supplemental appropriations for FY2005.15
9 UN ISDR, “Meeting in Paris to Plan Tsunami Early-Warning System,” Press Release:
IHA/1019, (Geneva, March 1, 2005).
10 Congressional Record, Jan. 4, 2005: H40.
11 Jan. 5, 2005 House briefing,.
12 State of New Hampshire, “Disaster Plan 409,” Sect. II, Geological Hazards, Seismic
Hazards, at [http://www.nhoem.state.nh.us/mitigation/state_of_new_hampshire.asp], visited
Jan. 11, 2005. See also “Is your Community Ready for the Next Tsunami,” National
Weather Service Tsunami Ready program, at [http://tsunami.gov], visited Jan. 11, 2005.
13 U.S. Office of Science and Technology Policy, “U.S. Announces Plan for Improved
Tsunami Detection and Warning System,” press release, OSTP News, Jan. 14, 2005. See
also Eli Kintisch, “South Asia Tsunami: U.S. Clamor Grows for Global Network of
Sensors,” Science, vol. 307, Jan. 14, 2005: 191.
14 John H. Marburger, Director of Office of Science and Technology Policy, “Testimony,”
Tsunami Preparedness, hearing before the U.S. Senate Committee on Commerce, Science,
and Transportation (Feb. 2, 2005). Hereafter, “Senate Commerce, Tsunami Preparedness
hearing,” available at [http://commerce.senate.gov/hearings/witnesslist.cfm?id=136], visited
Feb. 15, 2005.
15 U.S. Congress, House Committee on Appropriations, “Communication for the President
of the United States Transmitting a Request for Supplemental Appropriations ... Including
(continued...)

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CRS-5
Figure 1. U.S. Proposal for
Tsunami Detection/Warning System
Source: National Oceanic and Atmospheric Administration, from “U.S. Announces Plans
for an Improved Tsunami Warning and Detection System” (modified by CRS for
contrast), at [http://www.noaanews.noaa.gov/stories2005/s2369.htm], visited Jan. 18,
2005.
Emergency Supplemental Appropriations for FY2005. The House
Appropriations Committee recently recommended $14.5 million in emergency
supplemental appropriations for the U.S. tsunami warning network for FY2005 and
15 (...continued)
Tsunami Relief and Reconstruction,” H.Doc. 109-9, Feb. 15, 2005 (GPO, Washington:
2005).

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CRS-6
FY2006.16 Of that amount, $9.7 million would be used to acquire the additional
DART buoys needed to upgrade and expand U.S. tsunami detection capabilities.
Also, $4.8 million would be used to acquire 38 additional sea-level monitoring tide
gages; add personnel at U.S. Tsunami Warning Centers; and fund other U.S.
Tsunami Warning Program activities, such as local planning assistance
(TsunamiReady). In addition, the committee recommended $8.1 million for the U.S.
Geological Survey’s National Earthquake Information Center (NEIC), which operates
the Global Seismic Network (GSN). GSN real-time telecommunications capabilities
would be upgraded, and some of that funding would used to expand the network of
seismic detection equipment, and to accelerate production of tsunami inundation
maps for U.S. communities that could be affected, potentially.17 (See “Funding for
U.S. Tsunami Warning Programs” and “Related U.S. Programs,” below.)

NOAA’s Director of the National Weather Service, and others, have
emphasized that in addition to needing the capacity to monitor and detect possible
tsunamis, a telecommunications infrastructure for issuing tsunami warnings, such as
that presently in place in the Pacific Ocean, is critical for the Indian and Atlantic
Oceans operations. He noted that NOAA’s responsibility for tsunami warnings
terminate when those emergency communications are delivered to international
emergency management officials. He added that in the United States forecasts and
warnings are also picked up and distributed by local emergency managers and the
media after local and regional NWS weather forecast offices issue them.18 In some
nations, there are varying capabilities for relaying public emergency warnings,
especially locally; in some regions those are inadequate or non-existent.
Addressing international tsunami detection and warning capabilities, NOAA’s
Administrator, Admiral Lautenbacher, has promoted development of an international
Global Earth Observing System of Systems (GEOSS), an initiative that is supported
by President Bush. Billed as “an excellent example of science serving society,”
GEOSS would be built from existing data collection platforms, and would use the
telecommunications capabilities of other observation systems and communication
networks currently operating around the world. One of these networks would be the
International Global Ocean Observing System (IGOOS), another, Argo (climate
monitoring) floats. (See “U.S. Operations and Research,” below.) Through GEOSS,
IGOOS would help to build a global tsunami detection and warning capacity.19 U.S.
16 House Committee on Appropriations, “Making Emergency Supplemental Appropriations
for the Fiscal Year Ending September 30, 2005, and for Other Purposes,” Report to
accompany H.R. 1268 (H.Rept. 109-16, Ch. 5, p. 51, Mar. 11, 2005).
17 U.S. Office of Management and Budget, Budget for Fiscal Year 2006, Analytical
Perspectives, Department of Commerce, “Making Government More Effective: Improving
Environmental Stewardship,” p. 79 (U.S. GPO, Washington, DC: 2005). See also letter
from Director of OMB to the President prosing funding in FY2005 emergency supplemental
appropriations, Feb. 14, 2005.
18 Brig. Gen. Jack Kelly, Jr., former NWS Director, and present Deputy Administrator for
NOAA, “Testimony,” Senate Commerce, Tsunami Preparedness hearing.
19 Gen. David Johnson, Jan. 5, 2005 House briefing. For more information on ocean
observing systems, see U.S. Congress, House Resources Subcommittee on Fisheries,
(continued...)

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and international science ministers composing the “Group on Earth Observation” met
February 16, 2005, in Brussels, Belgium, and adopted a 10-year implementation plan
for GEOSS. The European Union hosted the event, with 60 other countries. Details
about international funding commitments, and a United States role in the global
tsunami warning network, are not likely expected until the G-8 Summit convenes in
July 2005.20 However, experts from Indian Ocean countries affected by the
December 26, 2004 tsunami, and other countries, met in early March to plan
development of a coordinated tsunami early warning system for the Indian Ocean
and to reaffirm benefactor countries’ financial commitments.

A number of international science agencies and nongovernmental organizations
generally support the Bush Administration proposal for a U.S. tsunami warning
system, and have called it “a good start.” Some social scientists argue for
“institutionalizing” a strong public education component, in whatever legislation
would implement the Administration’s plan or otherwise be introduced in Congress
for similar purposes.21 The public education initiative envisioned includes local
authorities as the developer and deliverer of disaster education activities; encourages
(federal) interagency partnerships and an established presence in the community;
supports adaptation as an alternative approach to disaster management; and promotes
low-tech, high-impact solutions for local emergency management.22
Congressional Action. Some Members of Congress have introduced bills
to expand existing tsunami early warnings networks globally. A majority of this
legislation emphasizes expediting expanded coverage for the United States and its
trust territories. Similar to the Bush Administration proposal, most legislation calls
for domestic needs to be met before international commitments are made. Also,
negotiations are recommended through established international diplomatic channels
to deliberate national roles and responsibilities for a global warning network.
S. 34 (Lieberman). The Global Tsunami Detection and Warning System Act
was introduced on January 24, 2005, and referred to the Senate Committee on
Commerce, Science, and Transportation.23 This bill addresses U.S. tsunami early
warning capabilities and deficiencies. It also recommends cooperative efforts with
established international agencies to develop regional tsunami warning and
emergency management capabilities for coastal communities around the globe. In
addition, S. 34 encourages an inventory of existing international capabilities, but it
is primarily focused on the institutional needs of developing a global warning
19 (...continued)
Conservation, and Wildlife, Status of Ocean Observing Systems in the United States,
Oversight Hearing, serial no. 108-102, July 13, 2004 (Washington, DC: GPO, 2005).
20 John Marburger, Senate Commerce Tsunami Preparedness hearing, Feb. 2, 2005.
21 Eileen Shea, Project Coordinator, East West Center, Honolulu, HI), “Testimony,” Senate
Commerce Tsunami Preparedness hearing, Feb. 2, 2005, available at [http://commerce.
senate.gov/hearings/testimony.cfm?id=1361&wit_id=3955], visited Feb. 3, 2005.
22 Id.
23 Associated Press, “Hill Eyes Tsunami Warning System — Lieberman calls for Global
Net,” Washington Times, Jan. 7, 2005: A10.

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network, and what might be an appropriate U.S. contribution. S. 34 authorizes $30
million for NOAA in FY2005 to expand the existing Pacific network and add
coverage for the Atlantic and Gulf of Mexico/Caribbean Sea. Also, $7.5 million is
authorized for each of FY2006 through FY2012 to operate and maintain the (U.S.)
system. It also directs the Secretary of Commerce to work with the Secretary of State
and the Department of the Interior (through USGS) to convene an international
conference, if there are indications one is needed, to seek agreement on its plans for
a global tsunami warning network, including funding contributions.
S. 50 (Inouye). The Tsunami Preparedness Act of 2005 was introduced on
January 24, 2005, and referred to the Senate Committee on Commerce, Science, and
Transportation. The bill directly supports the Bush Administration’s proposals for
an expanded U.S. tsunami early warning system, and the proposal to eventually assist
other nations in an international endeavor to build a global capacity. However, S. 50
goes further, to require dissemination of U.S. tsunami information and research
findings, and to facilitate technology transfer (for tsunami hazard mitigation efforts).
To accomplish that, the bill establishes a U.S. multi-agency task force that includes
NOAA, the Federal Emergency Management Agency (FEMA), USGS, and the
National Science Foundation (NSF). Also, it directs NOAA to provide assistance for
global tsunami warning efforts through its involvement with establishing an
international earth observation system (GEOSS). Section 8 of S. 50 authorizes $35
million for “each of fiscal years 2006 though 2012, to carry out the Act.”24
On February 2, 2005, the Senate Committee on Commerce, Science and
Transportation held hearings on S. 50, during which the bills author announced
establishment of a new Subcommittee on Disaster Preparedness, which he said would
be “effective in educating populations at risk” for tsunami disasters. He noted that
S. 50 takes into account sociological as well as technological needs for tsunami
detection and warning, leading to a major role for NSF. Also, S. 50 would allow
reimbursement of cash or services in kind to NOAA from international agencies.
On March 10, 2005, the committee marked up S. 50, adopting an amendment
by Senator Inouye in the nature of a substitute bill. The committee chairman, Senator
Stevens, stated that S. 50 would require Congress to be notified if a (DART) buoy
stops functioning, so that a replacement could be deployed. The amendment
authorizes $5 million annually for an “integrated coastal vulnerability and adaption
program.” It also establishes an international Tsunami Warning Center to monitor
warnings in the Pacific and disseminate information. S. 50 (amended) was reported
favorably to the full Senate on March 10, 2005.
S. 361 (Snowe). The Ocean and Coastal Observation Systems Act of 2005,
was introduced on February 10, 2005 and referred to the Senate Committee on
Science, Commerce, and Transportation. This bill develops a U.S. capacity “to
monitor a range of ocean conditions and quickly assess ocean-based threats,
including tsunamis....”25 Through NOAA, S. 361 proposes broader public access and
facilitation of timely public warnings of hazardous ocean conditions. It authorizes
24 Congressional Record, Jan. 24, 2005, p. S328.
25 Statement introducing S. 361, Congressional Record, Feb. 14, 2005: S1293-S1294.

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“such sums as may be necessary” for each of fiscal years 2006 through 2010,
indicating that at least half of the amount should be used to implement regional ocean
and coastal observing systems. That funding would be available until expended. The
measure was marked up on March 10, 2005, and reported favorably to the full Senate
without objection.
H.R. 396 (Menendez). The Early Warning and Rapid Notification Act of
2005 was introduced on January 26, 2005, and referred to the House Committee on
International Relations. This bill focuses on the sociological and institutional needs
for developing tsunami warning systems in foreign countries. The legislation
emphasizes four components of a proposed program to be established through the
U.S. Agency for International Development (AID): (1) prior knowledge of risks faced
by communities; (2) technological monitoring of hazards; (3) delivery of
understandable warnings to those at risk, and (4) knowledge and preparedness of how
to act when threatened by disasters. This bill addresses all disasters, although the
Indian Ocean tsunami is cited as one of the primary reasons for its introduction.
Also, H.R. 396 seeks to improve lines of international communications for delivery
of disaster warnings by identifying impediments in U.S. and foreign government
policies. It identifies the U.N. International Early Warning Program as the
appropriate institution to undertake that task. The bill authorizes $10 million
annually for FY2006 through FY2010 to develop an effective global public warning
capability; establish the necessary communications infrastructure; provide technical
expertise and training; and launch public education campaigns to minimize the loss
of life and property. Also, it calls for employing evolving technologies, such as
wireless communications, for emergency warning systems in United States
territories, and in international locations.
H.R. 465 (Faleomavaega)/H.R. 882 (Boehlert). On February 1, 2005, a
bill “To Provide for the Establishment of a Tsunami Mitigation Program for all
United States Insular Areas” was introduced and referred to the House Committee
on Resources. The bill establishes a tsunami hazard mitigation program within
NOAA for all U.S. insular areas. It requires NOAA to perform hazard assessment,
monitoring and warning, and public education functions for the benefit of all insular
areas of the United States, including American Samoa, Guam, the U.S. Virgin
Islands, Puerto Rico, and the Commonwealth of the Marianas Islands. No funding
authority for NOAA is proposed in the legislation. H.R. 882, introduced February
17, 2005, by the chairman of the House Science Committee, is similar to H.R. 465.
H.R. 499 (Shays). Introduced on February 1, 2005, the Global Tsunami
Detection and Warning System Act of 2005 was referred to the House Committees
on International Relations and Resources. This bill provides for the development of
a global tsunami detection and warning systems, to improve existing communication
of tsunami warnings to all potentially affected nations, and for other purposes. This
bill is similar to S. 34 (see above).

H.R. 890 (Pallone). The Tsunami Warning and Relief Act of 2005 was
introduced February 17, 2005. Title I of the bill, Tsunami Warning Systems,
establishes a Global Tsunami Reduction Program in NOAA to upgrade U.S. and
global protection from tsunamis, encouraging international cooperation in building
GEOSS. Also, it would expand the U.S. TsunamiReady program, and directs NOAA

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to work with USGS to integrate seismic activity monitoring through the Global
Seismic Network (GSN). It requires an annual progress report, and authorizes $38
million for FY2006 and $32 million for FY2007.
U.S. Tsunami Programs
Currently, NOAA has a national program managed by the National Weather
Service (NWS) to warn Pacific coastal areas of tsunamis, consisting of two regional
U.S. tsunami warning centers in the Pacific Ocean; a cooperative program to reduce
false tsunami alarm rates in the Pacific Ocean; monitoring and detection operations;
tsunami research activities; and public outreach and education programs.
Tsunami Warnings. The NWS operates the West Coast/Alaska Tsunami
Warning Center (WC/AKTWC) at Palmer, AK, and the Pacific Tsunami Warning
Center (PTWC), at Ewa Beach, HI.
The PTWC monitors for tsunamis and issues warnings for the Hawaiian
Islands, the U.S. Pacific territories, and other U.S. and international interests in the
Pacific Basin. It was established in 1949, after a strong earthquake and massive
landslides off the coast of southwest Alaska caused a tsunami disaster in the
Hawaiian Islands hours later. The WC/AKTWC was established in 1967, after a
devastating earthquake in Anchorage, AK, in 1964 caused localized tsunami
damages. This center is responsible for issuing warnings to emergency managers in
Alaska, British Columbia, Washington, Oregon, and California.
In 1992, NOAA launched a National Tsunami Hazard Mitigation Program
(NTHMP) to address credibility of Pacific tsunami warnings, which, at that time,
were being issued with a 75% false alarm rate. Local officials became concerned
about the significant social upheaval and economic disruption caused by them, and
whether the public would heed tsunami warnings in the future. Additionally, the
NTHMP focuses on the potential that a sizable earthquake in the Pacific Northwest
Cascadia Region could generate devastating tsunamis that would damage U.S.
Pacific coastal regions. Additionally, it assists five Pacific states, including Alaska,
California, Hawaii, Oregon, and Washington, in developing local tsunami
preparedness planning through its TsunamiReady program. NTHMP has developed
disaster models and tsunami inundation maps for many coastal communities of its
current member states.26
NOAA is also the leader of the UNESCO International Coordinating Group
(ICG) for the International Tsunami Warning System in the Pacific (ITSU). ITSU
was created in 1968 and operates out of the PTWC. It is currently made up of 26
member nations, most bounded by the Pacific Ocean, except Thailand and parts of
Indonesia, bounded by the Indian Ocean.27
26 Eddie Bernard of NOAA, Jan. 5, 2005 House briefing.
27 See “International Tsunami Information Center: ITSU Master Plan,” the International
Coordination Group for the Tsunami Warming System in the Pacific (IGC/ITSU),
UNESCO/IG, at [http://www.prh.noaa.gov/itic/more_about/itsu/itsu.html], visited February
(continued...)

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CRS-11
Figure 2. NOAA DART Platform
Source: National Oceanic and Atmospheric Administration, from “U.S. Announces Plans
for an Improved Tsunami Warning and Detection System.” See [http://www.noaanews.
noaa.gov/stories2005/s2369.htm], visited Jan. 18, 2005.
U.S. Operations and Research. NOAA currently operates a network of six
dedicated tsunami detection and relay stations as part of its Deep-Ocean Assessment
and Reporting of Tsunamis (DART) program.28 (See Figure 1, above, for their
location, and Figure 2, above, for the components.) These are equipped to provide
an early warning capability, but NOAA officials caution these are only effective if
there are emergency managers to receive their communications and, in turn, alert the
27 (...continued)
15, 2005.
28 Hugh B. Milburn et al., “Real-Time Tsunami Reporting from the Deep Ocean,” NOAA
Pacific Marine Environmental Laboratory (1996), at [http://www.ndbc.noaa.gov/Dart/
milburn_1996.shtml], visited Jan. 4, 2005. A seventh DART buoy owned and operated by
the Chilean government is deployed off Chile’s coast in South America.

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CRS-12
public to take the necessary precautions or evacuate. The Bush Administration’s
proposal includes a total of 7 DART buoys for the Atlantic and 25 for the Pacific, for
the first time monitoring the southwest Pacific Ocean.
Also, hundreds of NWS weather buoys operating off the coasts of the United
States record various meteorological data, while marine data buoys measure speed
of ocean currents, temperature, salinity, and pressure change. Sea surface height (or
sea level) also is measured by satellite-GPS (global positioning system) by NOAA’s
National Ocean Service tidal monitoring network, which is responsible for issuing
warnings. All these buoys are equipped to relay data and emergency communications
for navigational purposes.29
In addition, an array of 3,000 data buoys, known as Argo floats, will be
deployed in the equatorial waters of the Pacific Ocean. About a thousand of these
are being used currently to detect conditions for El Niños and La Niñas, which are
three- to seven-year climate variations that affect global weather. Argo floats might
also be considered as possible platforms for situating tsunami detection
instrumentation.30 These floats have been advocated by NOAA as “the next step in
global observations.”31 In the Atlantic Ocean, other possible platforms for tsunami
monitoring and detection include a growing number of regional and local coastal and
ocean monitoring networks in development along the coasts of Canada and the
United States. Legislation to use these systems as part of a tsunami detection and
warning network was introduced in the 108th Congress.32 In the 109th Congress,
Senator Snowe’s bill, S. 361, would promote similar goals. (See “Congressional
Action,” above.)
Funding for the U.S. Tsunami Warning Program. NOAA officials
estimate that the cost of adding tsunami detection instruments on Atlantic Ocean
platforms, such as weather buoys, or building dedicated DART platforms, could vary
depending upon the scale of the project — for example, the number of instruments
to be included and the out-year costs of operation and maintenance.33 Other
29 Eddie Bernard, House Science Committee briefing, Jan. 5, 2005.
30 NOAA/Woods Hole Oceanographic Institute, Observing the Ocean in Real-Time: Argo,
a Global Array of Profiling Floats to Understand and Forecast Climate, ed. Stan Wilson
(1996). Funded in part by private academic institutions.
31 Ibid.
32 On January 5, 2005, Representative Curt Weldon circulated a “Dear Colleague” letter
advocating the reintroduction of H.R. 5001 (108th Congress), the Ocean and Coastal
Observation System Act, in the 109th Congress. This legislation promoted development of
an “Integrated Ocean Observation System,” to protect U.S. citizens in coastal communities
from tsunamis. For further information on U.S. ocean observation systems, see U.S. House
Resources Subcommittee on Fisheries, Conservation, and Oceans, Status of Ocean
Observing Systems in the United States, Oversight Hearing, serial no. 108-102, July 13,
2004 (Washington, DC: GPO 2005).
33 NOAA officials estimated the cost to produce the existing six experimental DART
platforms, instrument them, provide a telecommunications capability, and maintain them at
approximately $125,000 each, but suggested there would be an economy of scale if the
(continued...)

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CRS-13
expenditures supporting the program include funding for NOAA’s U.S. tsunami-
related research activities, tsunami mitigation programs, public outreach and
education, the TsunamiReady program, and telecommunications upgrades for
supporting technologies such as the USGS Global Seismic Network (GSN). (See
“Related U.S. Programs,” below.)
Annual funding requested for U.S. tsunami monitoring, early warning, and
research is usually found in the NOAA National Weather Service (NWS) budget
under Operations and Research. Funding may be provided for NWS in NOAA’s
Procurement, Acquisition and Construction (PAC) account, and sometimes in
emergency supplemental appropriations acts as will likely occur in FY2005. Annual
appropriations for these activities are provided by Title II, Department of Commerce,
National Oceanic and Atmospheric Administration in the Commerce, Justice, State,
Judiciary, and Related Agencies appropriations acts. Prior to 2004, tsunami-related
activities were funded by the NOAA Research budget. (See Table 1.)
Table 1. National Oceanic and Atmospheric Administration
(NOAA) Funding for U.S. Tsunami Programs
($ million)
U.S. TSUNAMI
NTHMPb
TWEAKc
DART
Strengthen
Annual
WARNING
Buoy
Tsunami
Total
PROGRAMa
Acq.d
Warning
Networke
FY’06
Req.
2.3
0.0
6.0
3.5
$11.9
FY’05 Suppl.f
Req.
4.8
0.0
9.7
$14.6
FY’05
Approp.
4.3
2.0
0.0
—
$6.3
Req.
0.0
0.0
0.0
—
$0.0
FY’04
Approp.
4.3
2.0
0.6
—
$6.9
Req.
0.0
0.0
0.0
—
$0.0
FY’03
Approp.
4.3
—
—
—
$4.3
Req.
0.0
—
—
—
$0.0
FY’02
Approp.
3.3
—
—
—
$3.3
Req.
2.3
—
—
—
$2.3
FY’01
Approp.
3.3
—
—
—
$3.3
Req.
0.0
—
—
—
$0.0
Source: Compiled by CRS from annual Commerce, Justice, State, Judiciary and Related
Agency annual appropriations reports, and NOAA FY2006 Budget Summary.
Notes:
a. Funding for NOAA tsunami programs is not currently authorized by legislation. The last
official NOAA authorization to fund NWS /NOAA Research programs occurred on
October 29, 1992 in the 102nd Congress (P.L. 102-567).
33 (...continued)
President’s proposed total of 32 platforms for the United States in the Pacific and Atlantic
Oceans were produced.

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CRS-14
b. The Tsunami Hazard Mitigation Program has been operated out of the Pacific Tsunami
Warning Center, HI, and funded since FY2004 by the National Weather Service
(NWS). A major portion of the funding is divided among each of five Pacific states
(AK, HI, WA, OR, and CA). The NTHMP also operates the NOAA’s Tsunami Ready
program, which provides assistance for developing local warning capacity, emergency
planning, and tsunami inundation mapping.
c. Prior to FY2004, the Tsunami Warning and Environmental (Observation Center) AK
conducted experimental tsunami warning system programs. In FY2004, that program
was transferred to NWS along with all other tsunami-related programs.
d. Funding proposed for deployment of DART buoys from FY2005 emergency
supplemental appropriations and FY2006 regular appropriations.
e. NWS systems acquisition, in NOAA’s Procurement Account. This funding would
upgrade NOAA tsunami warning communications network capabilities, and global
telecommunications infrastructure. It does not include $8.1 million requested for
USGS’s Global Seismic Network (GSN) telecommunication upgrades (see below).
f. This is what the President has proposed to spend on these activities out of the FY2005
Emergency Supplemental Appropriations Act, if one is passed.
Related U.S. Programs. To reduce costs of a U.S. Atlantic coast tsunami
early warning system, engineers at NOAA say that it is technologically possible to
modify weather and marine data buoys, such as those currently situated off the
United States, to serve as platforms for mounting some tsunami monitoring and
detection instrumentation. These platforms do not measure at great depths like the
DART buoys, but would monitor other ocean conditions at the near-surface. The
USGS and others have suggested taking greater advantage of existing international
seismic monitoring stations, improving real-time data communications, and using
global telecommunications networks to issue tsunami warnings to local emergency
managers.34
The U.S. Geological Survey (USGS). USGS indirectly contributes to
tsunami early warning notification. It is networked with 128 global seismic
monitoring stations, including some that operate in the Indian Ocean, known as the
Global Seismic Network (GSN). The GSN is managed by the Incorporated Research
Institutions for Seismology (IRIS), which is a consortium of academic institutions
involved with earthquake monitoring, detection, and modeling. Although the USGS
does not specifically monitor for tsunami genesis, the GSN measures earthquake
activity around the globe in real time. Based on where they occur, and their
magnitude, the USGS makes determinations to warn NOAA of the possible onset of
a tsunami. USGS officials report that currently only about 80% of the network has
capability for real-time data communication. The President has proposed $8.1
million as part of emergency supplemental legislation for FY2005 to upgrade the
real-time telecommunications capabilities of the GSN, as well as expand the number
of seismic monitoring stations around the globe.35
34 Kenneth B. Allen, Director of the Partnership for Public Warning, “Letter to President
Bush,”Jan. 3, 2005, at [http://www.partnershipforpublicwarning.org/ppw/], visited Jan. 21,
2005. See also, Joab Jackson, “Cisco, IBM Propose Internet-Based Disaster Alert System,”
Government Computer News, Feb. 11, 2005, at [http://www.gcn.com], visited Feb. 15,
2005.
35 Dr. Charles Groat, Director of the USGS, Feb. 7, 2006, presentation on USGS FY2006
(continued...)

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CRS-15
In addition, USGS geological researchers collect and analyze data on crustal
deformation and ocean floor displacement, which could be precursors to earthquakes
that generate tsunamis. Also, USGS topographical mapping data is used in
developing tsunami inundation maps for emergency managers to develop evacuation
plans, as well as for government planning and private development. Although the
USGS primarily monitors for seismic activity on land, it has noted that land-based
operations can be as important for tsunami detection and warning, as ocean buoys.36
For example, in coastal areas of the United States, and especially along the Pacific
coast, earthquakes have generated landslides. Some of these have resulted in mass
wasting of land that has entered the ocean abruptly and displaced large volumes of
water. Landslides also can originate beneath the ocean and generate tsunamis.
Concerns for the Atlantic coast of the United States involves a potential that a
volcano in the eastern Atlantic could collapse.37
World Weather Watch. NOAA and other international weather agencies
issue warnings of meteorological conditions that primarily affect commercial air
traffic, but that also might put human lives in danger and cause significant economic
disruption for global nations. The U.N. World Weather Watch (WWW) is a
cooperative program organized and administered by the World Meteorological
Organization (WMO).38 NOAA plays a leadership role in the WWW, representing
the United States in scientific research, weather data collection and management, and
meteorological forecast and warning. The Department of State also plays an
important role in achieving and maintaining international agreements to sustain
WWW operations globally. The WWW has an established international
telecommunications network for receiving and distributing weather data and
warnings, including those for the United States and its trust territories. NOAA
Satellite Services manages one of three global WWW data centers for weather data
analysis and forecasting, which is also an international telecommunications
gateway.39
35 (...continued)
budget held at the Dept. of the Interior.
36 These include the USGS Advanced National Seismic System (ANSS), the Global Seismic
Network, and U.S. regional networks and cooperators. See [http://earthquake.usgs.gov/
eqinthenews/2004/usslav/neic_slav_faq.html], visited Jan. 4. 2004.
37 Rossella Lorenzi, “Top World Tsunami Hotspots Detailed,” Discovery News (online), Jan.
11, 2005, at [http://dsc.discovery.com/news/briefs/20050110/tsunamidanger.html], visited
Feb. 17, 2005. “According to Simon Day, Benfield Greig Hazard Research Center at
University College London, U.K., geological evidence suggests that during a future
eruption, Cumbre Vieja Volcano on the island of La Palma in the Canary Islands, off West
Africa, could experience a catastrophic failure of the western flank.”
38 U.S. Dept. of Commerce, NOAA, Office of the Federal Coordinator for Meteorology,
“World Weather Program,” The Federal Plan for Meteorological Services and Supporting
Research: Fiscal Year 2004, Report FCM P1-2003, Appendix B: 223-228 (Washington,
DC: Oct. 2003). Other examples of international communications networks are included.
39 NOAA’s Satellite and Information Services, which operates the two U.S. WWW data
Centers, reviews weather satellite data, which has since provided valuable information about
the Indian Ocean tsunami. See “NOAA Scientists Able to Measure Tsunami Height from
(continued...)

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National All Hazards Weather Radio (NAHWR). As for local emergency
management capabilities for the United States, the Department of Homeland Security
and the National Weather Service are modifying the NOAA Weather Radio network
as the initial infrastructure for communicating public warnings for all disasters,
natural or otherwise. Over time, Congress has expanded the reach of the former
NOAA Weather Radio so that this emergency telecommunications infrastructure is
able to provide adequate coverage of weather services and support local forecasting
and warning of extreme weather for more regions of the United States. NOAA has
improved technology of weather instrumentation to increase lead time of emergency
warnings; constructed transmission towers; added repeaters to expand ranges of
emergency notification; and distributed individual NOAA Weather Radio receivers
to the public, particularly in rural areas, so as many U.S. citizens as possible can
receive disaster warnings and emergency communications. Funding for NAHWR
has been about $5.5 million annually since FY2003.40
Conclusion
Decisions about whether and how to proceed with establishing an international
tsunami early warning system for the Indian Ocean (and elsewhere) will likely be
complicated for a number of reasons. One reason is because of the number of
different potential international parties that would be involved with the need to
coordinate data collection and warning dissemination, and a second is the funding
needed to establish a tsunami warning system in that region. A third is that nations,
including some in the Indian Ocean, might charge for access to critical satellite data
that may help in warning potential victims and assessing damages. Senator
Lieberman and others contend that the costs of acquiring those data may be well
worth it, in terms of lives saved. However, others assert that the costs of accessing
and using those proprietary data could be prohibitive. They are of the opinion that
access to global environmental data should be provided free of charge, especially
when the United States and other nations are providing disaster relief and plan on
funding tsunami detection and warning activities for the region.41
Still others foresee challenges to standardize tsunami detection instrumentation
and other related technology, and provide long-term maintenance for tsunami
warning systems. There are also concerns about national security and compromising
U.S. intelligence-gathering operations, if international telecommunications networks
are used. That notwithstanding, some U.S. lawmakers question the actual risk of a
tsunami hitting the U.S. Atlantic coast.42 They believe the probability is low, and
assert that risk should be considered in guiding development of and investment in a
39 (...continued)
Space,” at [http://www.noaanews.noaa.gov/stories2005/s2365.htm], visited Jan. 11, 2005.
40 See NOAA Weather Radio (NWR) at [http://www.nws.noaa.gov/nwr/], visited Jan. 10,
2005.
41 Washington Times, Jan. 7, 2005, p. A10.
42 USGS, Earthquake Hazards Program, “Off W Coast of Northern Sumatra, Can It Happen
in the United States?” at [http://earthquake.usgs.gov/eqinthenews/2004/usslav/canit.html],
visited Feb. 17, 2005.

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cooperative early tsunami warning system for the U.S. eastern seaboard. It appears
that many international scientific and engineering experts view the Administration’s
plan for expanding the U.S. tsunami early warning network as viable. Further, the
plan is backed by some Members of Congress who have introduced legislation to
prepare the way for a more effective, expanded tsunami detection and warning
system for coastlines of the United States and trust territories. The President’s plan
commits funding of $30 million for FY2005 and FY2006, with part of that from the
FY2005 Emergency Supplemental Appropriations Act, if Congress passes it, to
upgrade domestic tsunami detection capabilities. However, other legislation
modifies the Administration’s proposal to addresses international “in country”
sociological needs, including education and adaptation, as well as technological ones.
Many U.S. lawmakers and statesmen have indicated that greater deliberation is
needed before the United States commits resources to an international effort to
develop a global tsunami warning network. Foremost, they say that the United States
must define its role and responsibilities.
A number of international science agencies are encouraged that U.S. domestic
efforts and international planning are proceeding along similar time frames, and look
forward to the development of the Global Earth Observation System of System
(GEOSS), which, fundamentally, will be the United States’ long-term contribution
to global tsunami early warning protection.

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