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The earthquake itself has been considered an aftershock of the 2011 Tōhoku earthquake which had occurred almost ten years prior.
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2021 Fukushima earthquake.
USGS Shakemap for the 2021 Fukushima-Oki Earthquake
UTC time 2021-02-13 14:07:49
Local date 13 February 2021
Magnitude 7.1 Mw (USGS) 7.3 MJMA (JMA)
Depth 44.1 km (USGS) 55 km (JMA)
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Hey, Buddy here are all the details related to the earthquake occurred in Japan:- ⬇️✌
The Fukushima-ken Oki (Fukushima Prefecture Offshore) earthquake (Japanese: 福島県沖地震, Hepburn: Fukushima-ken'Oki Jishin) was a powerful and deadly seismic event that struck offshore east of Tōhoku, Japan. The magnitude 7.1 or 7.3 earthquake occurred on a Saturday night at 23:07 JST (14:07 UTC) on 13 February at a shallow focal depth of 51.9 kilometers (32.2 mi).[9] It had a maximum JMA intensity of Shindo 6+ while on the Mercalli intensity scale, it earned a rating of VIII (Severe).[10] The earthquake was followed by multiple aftershocks within less than an hour, three of which registering magnitude 5.3.[11] The earthquake itself has been considered an aftershock of the 2011 Tōhoku earthquake which had occurred almost ten years prior.[12]
The earthquake left one person dead, and at least 186 injured.[4][3] It also inflicted significant structural damage across the Tōhoku and Kanto regions.[13][8][14][15] In addition, a non-destructive 20 cm tsunami was observed at a port in Miyagi Prefecture in the early morning of 14 February.[16] Because of its proximity to the Fukushima Daiichi Nuclear Power Plant, the event provoked concerns of radiation leaks but were dismissed soon after. Although there were no changes to the level of radiation, cooling water used in two of the reactor units was discovered to be leaking, indicating some damage had occurred.
The earthquake occurred as the result of reverse faulting within the subducting Pacific Plate, and not on the subduction interface itself. Therefore, it could be considered an intraplate earthquake.Moment tensor solutions indicate that slip occurred either on a moderately dipping fault striking to the south, or a moderately dipping fault striking to the north-northeast, consistent with the east-west oriented compression expected in this region.[24][9] Meanwhile, the Earthquake Research Committee from the Japanese government said the earthquake ruptured along a 45 km-long, north-south striking fault that dips towards the east. According to the US Geological Survey, the earthquake struck at a depth of 49.9 km, while the Japanese Meteorological Agency placed its depth at 55 km, a revision from the initial 60 km. !!!