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A seismogram recorded in Massachusetts, United States. The magnitude 9.1 (M w) undersea megathrust earthquake occurred on 11 March 2011 at 14:46 JST (05:46 UTC) in the north-western Pacific Ocean at a relatively shallow depth of 32 km (20 mi), [9] [56] with its epicenter approximately 72 km (45 mi) east of the Oshika Peninsula of Tōhoku, Japan, lasting approximately six minutes.
The 1605 Keichō Nankaidō earthquake occurred at about 20:00 local time on 3 February. It had an estimated magnitude of 7.9 on the surface-wave magnitude scale and triggered a devastating tsunami that resulted in thousands of deaths in the Nankai and Tōkai regions of Japan. It is uncertain whether there were two separate earthquakes separated ...
The United States Geological Survey reported a magnitude (M ww ) of 7.1, at a depth of 25 km (16 mi) and a maximum Modified Mercalli intensity of VIII (Severe). [2] At least 24 aftershocks were recorded following the event, [8] with the strongest measuring M w 5.5. [9] The USGS initially reported two events, measuring magnitudes 7.1 and 6.9 ...
Japan’s Earthquake Research Committee said in January 2022 said there was a 70% to 80% chance of a megathrust earthquake in the subsequent 30 years. ... producing a magnitude-9.1 earthquake ...
- On March 11, 2011, a 9.0 magnitude earthquake and tsunami struck northeast Japan, killing nearly 20,000 people and causing a meltdown in Fukushima, leading to the world's worst nuclear disaster ...
The 2011 triple disasters along Japan's northeastern coast began with a magnitude 9 earthquake offshore that was more than 125 times more powerful than this week's quake in terms of the total ...
The earthquakes are caused by slip along the thrust fault that forms the contact between the two plates. These interplate earthquakes are the planet's most powerful, with moment magnitudes (M w) that can exceed 9.0. [1] [2] Since 1900, all earthquakes of magnitude 9.0 or greater have been megathrust earthquakes. [3]
Scientists recorded a slow-slip event in 2011 before the magnitude-9 Tohoku earthquake and tsunami in Japan, which killed more than 18,000 people and touched off the Fukushima nuclear disaster.