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2011 Tohoku earthquake and tsunami
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“2011 Miyagi earthquake” redirects here. For the aftershock that occurred on 6 April, see April 2011 Miyagi earthquake.
2011 Tohoku earthquake and tsunami
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An aerial view of damage in the Tohoku region with black smoke coming from the Nippon Oil Sendai oil refinery

Peak tsunami wave height locations, color-coded with red representing most severe
Date 14:46:23, 11 March 2011 (+09:00)
Duration 6 minutes[1]
Magnitude 9.0 Mw[2][3]
Depth 32 km (20 mi)
Epicenter location 38.322°N 142.369°ECoordinates: 38.322°N 142.369°E
Type Megathrust earthquake
Countries or regions affected
Japan (primary)
Pacific Rim (tsunami, secondary)
Total damage Tsunami wave, flooding, landslides, fires, building and infrastructure damage, nuclear incidents including radiation releases
Peak ground acceleration 2.99 g
Tsunami Yes. Up to 40.5 m (133 ft)
in Miyako, Iwate, Tohoku
Landslides Yes
Foreshocks 7
Aftershocks 1,235
Casualties 15,505 deaths,[4][5] 5,386 injured,[4][5] 7,305 people missing[4][5]

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The 2011 Tohoku earthquake, also known as the Great East Japan Earthquake,[6][7] (Japanese: “Eastern Japan Great Earthquake Disaster” (Higashi Nihon Daishinsai)[fn 1]) was a magnitude 9.0 (Mw) undersea megathrust earthquake off the coast of Japan that occurred at 14:46 JST (05:46 UTC) on Friday, 11 March 2011,[2][3][8] with the epicenter approximately 70 kilometres (43 mi) east of the Oshika Peninsula of Tohoku and the hypocenter at an underwater depth of approximately 32 km (20 mi).[2][9] It was the most powerful known earthquake to have hit Japan, and one of the five most powerful earthquakes in the world overall since modern record-keeping began in 1900.[8][10][11] The earthquake triggered extremely destructive tsunami waves of up to 40.5 metres (133 ft) in Miyako, Iwate, Tohoku.[12][13] In some cases traveling up to 10 km (6 mi) inland.[where?][14] In addition to loss of life and.