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List of foreshocks and aftershocks of the 2011 Tōhoku earthquake: Difference between revisions

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| 10&nbsp;km<ref name="usgs 11apr">[http://earthquake.usgs.gov/earthquakes/recenteqsww/Quakes/usc0002n9v.html Magnitude 6.6 – EASTERN HONSHU, JAPAN]. Earthquake.usgs.gov. Retrieved on 2011-04-12.</ref>
| 10&nbsp;km<ref name="usgs 11apr">[http://earthquake.usgs.gov/earthquakes/recenteqsww/Quakes/usc0002n9v.html Magnitude 6.6 – EASTERN HONSHU, JAPAN]. Earthquake.usgs.gov. Retrieved on 2011-04-12.</ref>
| lower 6
| lower 6
| 3 dead, several injured, building collapse, power outage.<ref>[http://www.asahi.com/national/update/0411/TKY201104110327.html asahi.com（朝日新聞社）：１０分間に震度６弱１回、５弱２回 未明まで余震３０回 – 社会]. Asahi.com. Retrieved on 2011-04-12.</ref><ref>[http://www.jiji.com/jc/c?g=soc&k=2011041100703 時事ドットコム：福島・茨城で震度６弱＝震度５弱続いて３回−土砂崩れで女子高生ら死亡]. Jiji.com. Retrieved on 2011-04-12.</ref><br>see [[2011 Fukushima earthquake]]
| 3 dead, several injured, building collapse, power outage.<ref>[http://www.asahi.com/national/update/0411/TKY201104110327.html asahi.com（朝日新聞社）：１０分間に震度６弱１回、５弱２回 未明まで余震３０回 – 社会]. Asahi.com. Retrieved on 2011-04-12.</ref><ref>[http://www.jiji.com/jc/c?g=soc&k=2011041100703 時事ドットコム：福島・茨城で震度６弱＝震度５弱続いて３回−土砂崩れで女子高生ら死亡]. Jiji.com. Retrieved on 2011-04-12.</ref>
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Revision as of 23:07, 12 April 2011

This is a list of foreshocks and aftershocks of the 2011 Tōhoku earthquake. By 8 August 2024, Japan had experienced over 900 aftershocks after the 9.0 M earthquake on March 11, 2011 with about 60 aftershocks being over 6.0 M and three over 7.0 M. To prevent this list becoming unmanageable, only earthquakes with magnitude greater than 7 or intensity greater than lower 6 on the shindo scale are listed here. Time, magnitude, coordinates, and depth are given according to the data of USGS.

Foreshock

Date Time
(UTC) 		Magnitude
(Mw) 		Latitude Longitude Depth Max. Intensity
(shindo) 		Comment
March 9, 2011 02:45 7.2 38.424°N 142.836°E 32 km[1] lower 5

Main shock

Date Time
(UTC) 		Magnitude
(Mw) 		Latitude Longitude Depth Max. Intensity
(shindo) 		Comment
March 11, 2011 05:46 9.0 38.322°N 142.369°E 32 km[2] 7 13 000+ dead, 13 000+ missing, tsunami, nuclear incidents.
see 2011 Tōhoku earthquake and tsunami

Aftershocks

Date Time
(UTC) 		Magnitude
(Mw) 		Latitude Longitude Depth Max. Intensity
(shindo) 		Comment
March 11, 2011 06:15 7.9 36.27°N 141.14°E 35 km[3] lower 6
March 11, 2011 06:25 7.7 38.05°N 144.59°E 18 km[4]
April 7, 2011 14:32 7.1 38.253°N 141.640°E 49 km[5] upper 6 4 dead, 100+ injured, large scale power outage in Tōhoku region.[6][7]
see 2011 Miyagi earthquake
April 11, 2011 08:16 6.6 37.007°N 140.477°E 10 km[8] lower 6 3 dead, several injured, building collapse, power outage.[9][10]

The following earthquakes are possibly related to the 2011 Tōhoku earthquake. However, agreement toward the relationships has not been reached among the researchers.[11]

Date Time
(UTC) 		Magnitude
(Mw) 		Latitude Longitude Depth Max. Intensity
(shindo) 		Comment
March 11, 2011 18:59 6.3 37.02°N 138.36°E 2 km[12] upper 6 Possibly a triggered earthquake.[13]
March 15, 2011 13:31 6.0 35.29°N 138.54°E 9 km[14] upper 6 Near presumed location of magma chamber of Mount Fuji. Possibly a triggered earthquake.[15]

References

  1. ^ Magnitude 7.2 – NEAR THE EAST COAST OF HONSHU, JAPAN. Earthquake.usgs.gov. Retrieved on 2011-04-12.
  2. ^ Magnitude 9.0 – NEAR THE EAST COAST OF HONSHU, JAPAN. Earthquake.usgs.gov (2011-03-14). Retrieved on 2011-04-12.
  3. ^ USGS Earthquake Hazards Program: Preliminary Earthquake Report: NEAR THE EAST COAST OF HONSHU, JAPAN. Neic.usgs.gov (2011-03-11). Retrieved on 2011-04-12.
  4. ^ USGS Earthquake Hazards Program: Preliminary Earthquake Report: OFF THE EAST COAST OF HONSHU, JAPAN. Neic.usgs.gov (2011-03-11). Retrieved on 2011-04-12.
  5. ^ Magnitude 7.1 – NEAR THE EAST COAST OF HONSHU, JAPAN. Earthquake.usgs.gov. Retrieved on 2011-04-12.
  6. ^ asahi.com（朝日新聞社）：東北の広域停電、完全復旧めどたたず 余震死者２人 – 東日本大震災. Asahi.com (2011-04-08). Retrieved on 2011-04-12.
  7. ^ ７日の地震 ４人死亡１４１人けが NHKニュース. .nhk.or.jp. Retrieved on 2011-04-12.
  8. ^ Magnitude 6.6 – EASTERN HONSHU, JAPAN. Earthquake.usgs.gov. Retrieved on 2011-04-12.
  9. ^ asahi.com（朝日新聞社）：１０分間に震度６弱１回、５弱２回 未明まで余震３０回 – 社会. Asahi.com. Retrieved on 2011-04-12.
  10. ^ 時事ドットコム：福島・茨城で震度６弱＝震度５弱続いて３回−土砂崩れで女子高生ら死亡. Jiji.com. Retrieved on 2011-04-12.
  11. ^ 静岡東部の震度６強、東海地震誘発せず…専門家 : 科学 : YOMIURI ONLINE（読売新聞）. Yomiuri.co.jp. Retrieved on 2011-04-12.
  12. ^ USGS Earthquake Hazards Program: Preliminary Earthquake Report: NEAR THE WEST COAST OF HONSHU, JAPAN. Neic.usgs.gov. Retrieved on 2011-04-12.
  13. ^ 2011年3月 東北地方太平洋沖地震 | 広報アウトリーチ室. Outreach.eri.u-tokyo.ac.jp. Retrieved on 2011-04-12.
  14. ^ USGS Earthquake Hazards Program: Preliminary Earthquake Report: EASTERN HONSHU, JAPAN. Neic.usgs.gov (2011-03-15). Retrieved on 2011-04-12.
  15. ^ 東日本沖巨大地震. Sk01.ed.shizuoka.ac.jp. Retrieved on 2011-04-12.
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