Here you will find general information on the science behind tsunami generation, computer animations of tsunamis, and summaries of past field studies.
Field Studies
Our researchers collect data from sites of recent tsunamis to gain a better understanding of the potential impact on other regions with high probability of tsunamis. Their work helps inform coastal planning, protection, and resiliency.
Animations
Learn about the earthquakes that triggered recent tsunami events, and watch computer simulations of each tsunami from different angles.
Learn More
Background information and links to our other tsunami research projects.
The scope of tsunami research within the USGS, however, is broader than the topics covered here. USGS researchers have also provided critical research toward understanding how sediments are transported during tsunami runup and deciphering the geologic record of prehistoric tsunamis. The USGS collaborates closely with the NOAA Center for Tsunami Research.
As part of the National Tsunami Hazard Mitigation Program, the USGS has also upgraded the seismograph network and communication functions of the U.S. Tsunami Warning Center.
Soon after the devastating tsunami in the Indian Ocean on December 26, 2004 many people have asked, “Could such a tsunami happen in the United States?” As a starting point, read “Could It Happen Here?”
Starting points:
- Could It Happen Here?
- Life of a Tsunami
- Local Tsunamis in the Pacific Northwest
-
- Not all tsunamis are generated by earthquakes
- Tsunamis can be caused by volcanoes, landslides, and even atmospheric disturbances
- Data from tide gauges can help unravel the complex physics of these sources
Tsunami events:
March 11, 2011, Japan
- Preliminary simulations of the tsunami
- Notes from the field: International Tsunami Team visits Japan before (2010) and after (May 2011);
plus eyewitness accounts from California on March 11
September 29, 2009, Samoa
- Preliminary analysis of the tsunami
- USGS scientists in Samoa and American Samoa studying impacts of tsunami
April 1, 2007, Solomon Islands
March 28, 2005, Sumatra
- Analysis and comparison of the December 2004 and March 2005 tsunamis
- Field study of the effects of the December 2004 and March 2005 earthquakes and tsunamis - April 2005
December 26, 2004, Sumatra-Andaman Islands
- Tsunami generation from the 2004 M=9.1 Sumatra-Andaman earthquake
- Initial findings on tsunami sand deposits, damage, and inundation in Sumatra - January 2005
- Initial findings on tsunami sand deposits, damage, and inundation in Sri Lanka - January 2005
June 23, 2001, Peru
- Preliminary analysis of the tsunami generated by the earthquake
- Preliminary analysis of sedimentary deposits from the tsunami
July 17, 1998, Papua New Guinea
Below are current tsunami studies and tsunami education materials.
Cascadia Subduction Zone Marine Geohazards
Could It Happen Here? Could It Happen Here?
Life of a Tsunami Life of a Tsunami
Local Tsunamis in the Pacific Northwest Local Tsunamis in the Pacific Northwest
Probabilistic Forecasting of Earthquakes, Tsunamis, and Earthquake Effects in the Coastal Zone
Coastal and Marine Geohazards of the U.S. West Coast and Alaska
Tsunami Hazards, Modeling, and the Sedimentary Record
PubTalk 1/2017 — Unusual sources of tsunamis
A presentation on "Unusual Sources of Tsunamis From Krakatoa to Monterey Bay" by Eric Geist, USGS Research Geophysicist - Not all tsunamis are generated by earthquakes.- Tsunamis can be caused by volcanoes, landslides, and even atmospheric disturbances- Data from tide gauges can help unravel the complex physics of these sources Videographers: Mitch Adelson, William Seelig, USGS
Below are FAQs associated with tsunamis.
Could a large tsunami happen in the United States? Could a large tsunami happen in the United States?
Large tsunamis have occurred in the United States and will undoubtedly occur again. Significant earthquakes around the Pacific rim have generated tsunamis that struck Hawaii, Alaska, and the U.S. west coast. One of the largest and most devastating tsunamis that Hawaii has experienced was in 1946 from an earthquake along the Aleutian subduction zone. Runup heights reached a maximum of 33 to 55 feet...
Is there a system to warn populations of an imminent occurrence of a tsunami? Is there a system to warn populations of an imminent occurrence of a tsunami?
NOAA (National Oceanic and Atmospheric Administration) maintains the U.S. Tsunami Warning Centers, and work in conjunction with USGS seismic networks to help determine when and where to issue tsunami warnings. Also, if an earthquake meets certain criteria for potentially generating a tsunami, the pop-up window and the event page for that earthquake on the USGS Latest Earthquakes Map will include a...
What are tsunamis? What are tsunamis?
Tsunamis are ocean waves triggered by: Large earthquakes that occur near or under the ocean Volcanic eruptions Submarine landslides Onshore landslides in which large volumes of debris fall into the water Scientists do not use the term "tidal wave" because these waves are not caused by tides. Tsunami waves are unlike typical ocean waves generated by wind and storms, and most tsunamis do not "break"...
What is it about an earthquake that causes a tsunami? What is it about an earthquake that causes a tsunami?
Although earthquake magnitude is one factor that affects tsunami generation, there are other important factors to consider. The earthquake must be a shallow marine event that displaces the seafloor. Thrust earthquakes (as opposed to strike slip) are far more likely to generate tsunamis, but small tsunamis have occurred in a few cases from large (i.e., > M8) strike-slip earthquakes. Note the...
What is the difference between a tsunami and a tidal wave? What is the difference between a tsunami and a tidal wave?
Although both are sea waves, a tsunami and a tidal wave are two different and unrelated phenomena. A tidal wave is a shallow water wave caused by the gravitational interactions between the Sun, Moon, and Earth ("tidal wave" was used in earlier times to describe what we now call a tsunami.) A tsunami is an ocean wave triggered by large earthquakes that occur near or under the ocean, volcanic...
Here you will find general information on the science behind tsunami generation, computer animations of tsunamis, and summaries of past field studies.
Field Studies
Our researchers collect data from sites of recent tsunamis to gain a better understanding of the potential impact on other regions with high probability of tsunamis. Their work helps inform coastal planning, protection, and resiliency.
Animations
Learn about the earthquakes that triggered recent tsunami events, and watch computer simulations of each tsunami from different angles.
Learn More
Background information and links to our other tsunami research projects.
The scope of tsunami research within the USGS, however, is broader than the topics covered here. USGS researchers have also provided critical research toward understanding how sediments are transported during tsunami runup and deciphering the geologic record of prehistoric tsunamis. The USGS collaborates closely with the NOAA Center for Tsunami Research.
As part of the National Tsunami Hazard Mitigation Program, the USGS has also upgraded the seismograph network and communication functions of the U.S. Tsunami Warning Center.
Soon after the devastating tsunami in the Indian Ocean on December 26, 2004 many people have asked, “Could such a tsunami happen in the United States?” As a starting point, read “Could It Happen Here?”
Starting points:
- Could It Happen Here?
- Life of a Tsunami
- Local Tsunamis in the Pacific Northwest
-
- Not all tsunamis are generated by earthquakes
- Tsunamis can be caused by volcanoes, landslides, and even atmospheric disturbances
- Data from tide gauges can help unravel the complex physics of these sources
Tsunami events:
March 11, 2011, Japan
- Preliminary simulations of the tsunami
- Notes from the field: International Tsunami Team visits Japan before (2010) and after (May 2011);
plus eyewitness accounts from California on March 11
September 29, 2009, Samoa
- Preliminary analysis of the tsunami
- USGS scientists in Samoa and American Samoa studying impacts of tsunami
April 1, 2007, Solomon Islands
March 28, 2005, Sumatra
- Analysis and comparison of the December 2004 and March 2005 tsunamis
- Field study of the effects of the December 2004 and March 2005 earthquakes and tsunamis - April 2005
December 26, 2004, Sumatra-Andaman Islands
- Tsunami generation from the 2004 M=9.1 Sumatra-Andaman earthquake
- Initial findings on tsunami sand deposits, damage, and inundation in Sumatra - January 2005
- Initial findings on tsunami sand deposits, damage, and inundation in Sri Lanka - January 2005
June 23, 2001, Peru
- Preliminary analysis of the tsunami generated by the earthquake
- Preliminary analysis of sedimentary deposits from the tsunami
July 17, 1998, Papua New Guinea
Below are current tsunami studies and tsunami education materials.
Cascadia Subduction Zone Marine Geohazards
Could It Happen Here? Could It Happen Here?
Life of a Tsunami Life of a Tsunami
Local Tsunamis in the Pacific Northwest Local Tsunamis in the Pacific Northwest
Probabilistic Forecasting of Earthquakes, Tsunamis, and Earthquake Effects in the Coastal Zone
Coastal and Marine Geohazards of the U.S. West Coast and Alaska
Tsunami Hazards, Modeling, and the Sedimentary Record
PubTalk 1/2017 — Unusual sources of tsunamis
A presentation on "Unusual Sources of Tsunamis From Krakatoa to Monterey Bay" by Eric Geist, USGS Research Geophysicist - Not all tsunamis are generated by earthquakes.- Tsunamis can be caused by volcanoes, landslides, and even atmospheric disturbances- Data from tide gauges can help unravel the complex physics of these sources Videographers: Mitch Adelson, William Seelig, USGS
Below are FAQs associated with tsunamis.
Could a large tsunami happen in the United States? Could a large tsunami happen in the United States?
Large tsunamis have occurred in the United States and will undoubtedly occur again. Significant earthquakes around the Pacific rim have generated tsunamis that struck Hawaii, Alaska, and the U.S. west coast. One of the largest and most devastating tsunamis that Hawaii has experienced was in 1946 from an earthquake along the Aleutian subduction zone. Runup heights reached a maximum of 33 to 55 feet...
Is there a system to warn populations of an imminent occurrence of a tsunami? Is there a system to warn populations of an imminent occurrence of a tsunami?
NOAA (National Oceanic and Atmospheric Administration) maintains the U.S. Tsunami Warning Centers, and work in conjunction with USGS seismic networks to help determine when and where to issue tsunami warnings. Also, if an earthquake meets certain criteria for potentially generating a tsunami, the pop-up window and the event page for that earthquake on the USGS Latest Earthquakes Map will include a...
What are tsunamis? What are tsunamis?
Tsunamis are ocean waves triggered by: Large earthquakes that occur near or under the ocean Volcanic eruptions Submarine landslides Onshore landslides in which large volumes of debris fall into the water Scientists do not use the term "tidal wave" because these waves are not caused by tides. Tsunami waves are unlike typical ocean waves generated by wind and storms, and most tsunamis do not "break"...
What is it about an earthquake that causes a tsunami? What is it about an earthquake that causes a tsunami?
Although earthquake magnitude is one factor that affects tsunami generation, there are other important factors to consider. The earthquake must be a shallow marine event that displaces the seafloor. Thrust earthquakes (as opposed to strike slip) are far more likely to generate tsunamis, but small tsunamis have occurred in a few cases from large (i.e., > M8) strike-slip earthquakes. Note the...
What is the difference between a tsunami and a tidal wave? What is the difference between a tsunami and a tidal wave?
Although both are sea waves, a tsunami and a tidal wave are two different and unrelated phenomena. A tidal wave is a shallow water wave caused by the gravitational interactions between the Sun, Moon, and Earth ("tidal wave" was used in earlier times to describe what we now call a tsunami.) A tsunami is an ocean wave triggered by large earthquakes that occur near or under the ocean, volcanic...