2011 Tsunamis



Event List - January 1 - December 31, 2011

Advisories issued by international tsunami warning centres. The Pacific Tsunami Warning Center (P) issues: Tsunami Information Bulletins (TIB), Fixed and Expanding Regional Warnings (FRW, ERW), and Ocean-wide Watch/Warnings (TWW) for the Pacific; Tsunami Information Bulletins (TIB), Local, Regional, and Ocean-wide Tsunami Watches (LTW, RTW, TW) for the Indian Ocean; Tsunami Information Statements (TIS), Local, Regional, and Ocean-wide Watches (LTW, RTW, TW) for the wider Caribbean (C). The Japan Meteorological Agency (J), issues: Tsunami Advisories (NWPTA) for the Northwestern Pacific; Tsunami Watch Information (TWI) for the Indian Ocean. The West Coast/Alaska Tsunami Warning Center (A) issues: Tsunami Information Statements (TIS), Tsunami Watch/Warnings (TWW) for Canada, the US (including Puerto Rico, excluding Hawaii and US-affiliated Pacific Island countries), and the US/British Virgin Islands. Depth (from GCMT solution) epicenter and Mw from the USGS (G), and Mw from PTWC (P) and JMA (MJMA for Japan local vicinity) at action time. Wave height and period measurements from sea level gauges reported as amplitude, peak to trough, or greatest value for either inundation or runup as indicated. Other earthquakes with moment magnitude (Mw) greater than or equal to 6.5 and a depth no greater than 100 km, as recorded by USGS, have also been included.

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11 March 2011, MW 9.0, Near the East Coast of Honshu Japan Tsunami

2011 off the Pacific Coast of Tohoku, Japan Earthquake and Tsunami Information Clearinghouse
2011 Tohoku Earthquake Tsunami Joint Survey Group
15 March 2011: 3 days after the 11 March 2011 Earthquake off the Pacific Coast of Tohoku, Japan
12 March 2011: IOC Coordinated Tsunami Warning System Plays Key Role in Japanese Emergency

 

The 11 March 2011 magnitude 9.0 Honshu, Japan earthquake (38.322 N, 142.369 E, depth 32 km) generated a tsunami that was observed all over the Pacific region and caused tremendous devastation locally. As of 30 May 2011, the Japan National Police Agency reports 15,270 persons killed and 8,499 persons missing from the earthquake and tsunami. 115,433 residents are still staying at evacuation shelters.  The 2011 Tohoku Earthquake Tsunami Joint Survey Group (http://www.coastal.jp/tsunami2011/) reports highest tsunami runup heights at Sendai in the 15-20 m range.  On 7 April 2011, a M7.1 (USGS) earthquake aftershock occurred which killed 2 persons, but no tsunami was generated.
The 11 March 2011 Japanese tsunami was the first to cause deaths since the 1993 Sea of Japan magnitude 7.7 earthquake caused 23 deaths and generated a tsunami that caused an additional 208 deaths in Japan. In comparison, the most fatal and damaging tsunami that has ever occurred in the world was the 2004 magnitude 9.1 Sumatra earthquake and tsunami that caused almost 230,000 deaths, $10 billion in damage, and a maximum water height of 50 m.
According to the NOAA National Geophysical Data Center / World Data Center for Marine Geology and Geophysics / (http://www.ngdc.noaa.gov/hazard/) Global Historical Event databases, 260 confirmed tsunamis have been generated near Japan since 684 A.D. Of these, 71 (27%) caused deaths. The majority of Japanese tsunamis were generated by earthquakes (94%), the remainder were caused by volcanic eruptions (6%). The most fatal Japanese tsunamis are listed below:

  • 1498 Enshunada Sea earthquake-generated tsunami caused 31,000 deaths
  • 1586 Ise Bay earthquake and tsunami caused over 8,000 deaths
  • 1707 Nankaido earthquake and tsunami caused 30,000 deaths
  • 1771 Ryukyu Islands earthquake-generated tsunami caused over 13,000 deaths
  • 1896 Sanriku earthquake and tsunami caused over 27,000 deaths

1) Alert Information International
2) Sea Level KMZ (ZIP of KMZ 7.5 MB)
Energy and Max wave amplitudes - (JPG 1.3 MB)
Max wave amplitudes by country - (JPG 688 KB)
3) Seismic
4) Model Simulations
5) Data and Information Sites
6) Media Japan Damage Reports
7) Photos, Satellite Imagery
8) Videos
9) Post-Earthquake Post-Tsunami Surveys
10) Other

 

 

 

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