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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.
In Japan, the Shindo scale is commonly used to measure earthquakes by seismic intensity instead of magnitude. This is similar to the Modified Mercalli intensity scale used in the United States or the Liedu scale used in China, meaning that the scale measures the intensity of an earthquake at a given location instead of measuring the energy an earthquake releases at its epicenter (its magnitude ...
In Japan, the Nankai megathrust under the Nankai Trough is responsible for Nankai megathrust earthquakes and associated tsunamis. [19] The largest megathrust event within the last 20 years was the magnitude 9.0–9.1 Tōhoku earthquake along the Japan Trench megathrust. [20]
The last tsunami warning in the San Francisco Bay Area followed a 9.1 earthquake in Tohoku, Japan that sparked a major nuclear accident at the Fukushima-Daiichi nuclear power plant in March 2011 ...
Shortly after the 2011 Tōhoku earthquake, new reports were released which indicated the significant likelihood of another magnitude 9 earthquake occurring elsewhere in Japan, this time on the Nankai Trough. The reports stated that if a 9.0 earthquake occurred on the Nankai Trough, the effects would be very serious.
2011 Tōhoku earthquake and tsunami: Japan: 9.1 $360 billion [177] [178] 2 1995 Great Hanshin earthquake: Japan: 6.9 $200 billion [179] 3 2023 Turkey–Syria earthquakes: Turkey Syria: 7.8 $163.6 billion [180] [181] 4 2008 Sichuan earthquake: China 7.9 $150 billion [182] 5 2011 Christchurch earthquake: New Zealand 6.3 $40 billion [183] 6 2004 ...
In 2011, more than 18,000 people lost their lives amid a magnitude-9.0 earthquake and tsunami in Tohoku, Japan, The New Yorker noted. That catastrophe wound up costing approximately $220 billion.
The 2011 Tohoku earthquake was the largest earthquake ever recorded in Japan, and is the fourth largest earthquake in recorded history, a tsunami up to 40.5 m (133 ft) high caused 19,745 deaths with 6,242 people injured, and 2,556 people missing.