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  1. Mechanism of Earthquake Early Warning. In Japan, the Earthquake Early Warning ( EEW) (緊急地震速報, Kinkyū Jishin Sokuhō) is a warning issued when an earthquake is detected by multiple seismometers. [4] . These warnings are primarily issued by the Japan Meteorological Agency (JMA), with guidance on how to react to them. [5] [6] Introduction.

  2. On 11 March 2011, at 14:46 JST (05:46 UTC), a Mw 9.0–9.1 undersea megathrust earthquake occurred in the Pacific Ocean, 72 km (45 mi) east of the Oshika Peninsula of the Tōhoku region. It lasted approximately six minutes and caused a tsunami. It is sometimes known in Japan as the "Great East Japan Earthquake" (東日本大震災, Higashi ...

  3. This is a list of earthquakes in Japan with either a magnitude greater than or equal to 7.0 or which caused significant damage or casualties. As indicated below, magnitude is measured on the Richter magnitude scale ( ML) or the moment magnitude scale ( Mw ), or the surface wave magnitude scale ( Ms) for very old earthquakes.

  4. Earthquake. Intensity. Aftershocks. Impact. Tsunami warning. Other events. See also. References. External links. March 2021 Miyagi earthquake. On March 20, 2021 at 18:09 JST (09:09 UTC ). The magnitude 6.9 or 7.0 earthquake struck offshore east of Tōhoku, Japan at a depth of 54.0 kilometers (33.6 mi) to 60 kilometers (37 mi).

  5. The Japan Meteorological Agency (JMA) Seismic Intensity Scale [1] (known in Japan as the Shindo seismic scale) [2] is a seismic intensity scale used in Japan to categorize the intensity of local ground shaking caused by earthquakes .

  6. The Tōkai earthquakes ( Japanese: 東海地震) are major earthquakes that have occurred regularly with a return period of 100 to 150 years in the Tōkai region of Japan. The Tōkai segment has been struck by earthquakes in 1498, 1605, 1707, and 1854. [1] .

  7. The 2016 Tottori earthquake (鳥取県中部地震, Tottori-ken Chūbu Jishin) [6] is an earthquake that occurred in central Tottori Prefecture in Japan on October 21, 2016. [7] [8] [9] It measured 6.2 on the moment magnitude scale. [10] [11] The earthquake left 32 people injured.

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