April 2011 Miyagi earthquake

April 2011 Miyagi earthquake
2011年 宮城県沖地震
April 2011 Miyagi earthquake is located in Tohoku, Japan
April 2011 Miyagi earthquake
11 March quake
11 March quake
Sendai
Sendai
UTC time2011-04-07 14:32:44
ISC event16413596
USGS-ANSSComCat
Local date7 April 2011 (2011-04-07)
Local time23:32 JST
Magnitude7.1 Mw [1]
Depth49 km (30 mi)
Epicenter38°15′11″N 141°38′24″E / 38.253°N 141.640°E / 38.253; 141.640
TypeThrust
Areas affectedJapan
Max. intensityMMI VIII (Severe) [2]

JMA 6+[3]
Peak acceleration1.47 g [4]
Casualties4 confirmed dead, 141 injured[5]

The April 2011 Miyagi earthquake (2011年 宮城県沖地震, 2011-Nen Miyagi-ken-oki jishin) occurred off the coast of Miyagi Prefecture, approximately 66 kilometres (41 mi) east of Sendai, Japan. The Mw7.1 thrust earthquake was classified as an aftershock of the March 11 Tōhoku earthquake, and occurred at 23:32 JST (14:32 UTC) on Thursday, 7 April 2011.

Several tsunami warnings were issued for the northeastern coast of Honshu; however, they were all canceled 90 minutes later.[6] Over 3 million households in the area were left without power, and several nuclear plants suffered minor malfunctions. There was no major structural damage, but the quake killed at least 4 people and injured 141.[7]

  1. ^ "Magnitude 7.1 – NEAR THE COAST OF HONSHU, JAPAN". earthquake.usgs.gov. USGS. 7 April 2011. Archived from the original on 14 April 2011. Retrieved 2011-04-09.
  2. ^ "PAGER – M 7.1 – NEAR THE EAST COAST OF HONSHU, JAPAN". earthquake.usgs.gov. USGS. 7 April 2011. Retrieved 2011-04-20.
  3. ^ "震度データベース検索 （地震別検索結果）". Japan Meteorological Agency (in Japanese). Japan. Archived from the original on 16 July 2020. Retrieved 16 April 2021.
  4. ^ "Shakemap usc0002ksa". earthquake.usgs.gov. Archived from the original on 4 March 2016. Retrieved 12 January 2022.
  5. ^ Staff Writer (8 April 2011). "4 killed, 141 injured after 7.4 quake hits Miyagi Pref, vicinity". Japan Today. Retrieved 2011-04-08.
  6. ^ Rubinsky, Cara (7 April 2011). "Japan lifts new tsunami warning after 7.4 quake". Associated Press. Retrieved 2011-04-08.
  7. ^ Cooper, Hayden (April 8, 2011). "Japan aftershock kills four, dozens injured". radioaustralianews.au.net. ABC Radio Australia News. Archived from the original on 2011-04-08. Retrieved 2011-04-08.