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|mapsize = |caption = |date = 23:32:41, 7 April 2011 (+09:00) |origintime = |duration = |magnitude = 7.1 (Mw) |depth = |location = |type = Aftershock |countries affected = Japan |damage = |intensity = MM VIII |PGA = |tsunami = |landslide = |foreshocks = |aftershocks = |casualties = 4 confirmed dead, 141 injured }} The April 2011 Miyagi earthquake (Japanese: ) was a magnitude 7.1 Mw earthquake, with an epicentre off the coast of Miyagi Prefecture, approximately east of Sendai, Japan. The 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. Over 3 million households in the area were left without power, and several nuclear plants suffered minor inconveniences. There was no major structural damage, but the quake killed at least 4 people and injured 141. ==Earthquake== The magnitude 7.1 (MW) earthquake occurred undersea at a focal depth of 49 km (30.4 mi) in the western Pacific Ocean on 7 April 2011 at 14:21 UTC, approximately 66 km (41 mi) east of Sendai. The quake was a direct result of thrust–reverse faulting on or near the subduction zone plate boundary between the Pacific and North American Plates. Initially estimated at a magnitude of 7.4, the tremor was felt in several areas near the east coast of Honshu as an aftershock of the 11 March magnitude 9.0 megathrust Tōhoku earthquake. The aftershock sequence of this event is ongoing since 11 March, and includes over 58 earthquakes of magnitude 6.0 or greater up until 7 April 2011, with only two others of magnitude 7.0 or greater.〔 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「April 2011 Miyagi earthquake」の詳細全文を読む スポンサード リンク
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