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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 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 (Mw) that can exceed 9.0. [1][2] Since 1900, all earthquakes of magnitude 9.0 or greater have been megathrust earthquakes. [3]
On 26 December 2004, at 07:58:53 local time (UTC+7), a major earthquake with a magnitude of 9.2–9.3 Mw struck with an epicentre off the west coast of northern Sumatra, Indonesia. The undersea megathrust earthquake, known by the scientific community as the Sumatra–Andaman earthquake, [8][9] was caused by a rupture along the fault between the ...
9.1–9.3. Depth. 30. Epicenter. Indian Ocean, off the coast of Sumatra. Casualties. 31,229 confirmed dead, 4,093 missing, 21,411 injured. Sri Lanka was one of the countries struck by the tsunami resulting from the Indian Ocean earthquake on December 26, 2004. On January 3, 2005, Sri Lankan authorities reported 30,000+ confirmed deaths.
A pie chart comparing the seismic moment release of the three largest earthquakes for the hundred-year period from 1906 to 2005 with that for all earthquakes of magnitudes <6, 6 to 7, 7 to 8, and >8 for the same period. The 2011 Japan quake would be roughly similar to Sumatra. Earthquakes of magnitude 8.0 and greater from 1900 to 2018.
The humanitarian response to the 2004 Indian Ocean earthquake of a magnitude of 9.1 was prompted by one of the worst natural disasters of modern times. On December 26, 2004, the earthquake, which struck off the northwest coast of the Indonesian island of Sumatra, generated a tsunami that wreaked havoc along much of the rim of the Indian Ocean.
The Summary. Japan’s meteorological agency on Thursday issued its first-ever “megaquake advisory.”. The warning followed a 7.1-magnitude earthquake off the country’s southern coast. That ...
Tokyo Electric Power Company (TEPCO) submits a report to Japan's nuclear safety agency which predicts the possibility of a tsunami up to 10.2 metres high at the Fukushima Daiichi nuclear plant in the event of an earthquake similar to the magnitude 7.2 earthquake with accompanying tsunami that devastated the area in 1896. TEPCO actually made ...