2018 Hualien earthquake

2018 Hualien earthquake
國軍馳援花蓮震災 11.jpg
The Yun Men Tsui Ti building, severely tilted after the quake
2018 Hualien earthquake is located in Taiwan
2018 Hualien earthquake
UTC time2018-02-06 15:50:43
Local date6 February 2018 (2018-02-06)
Local time23:50:42 local time
Magnitude6.4 Mww
Depth10.6 kilometres (7 mi)
Epicenter24°07′55″N 121°39′32″E / 24°07′55″N 121°39′32″E / 24.132; 121.659
Areas affectedHualien County, Taiwan
Max. intensityVIII (severe)
Peak acceleration482.36 gal (0.42 g)
Peak velocity32.04 cm/s
Casualties17 dead, 285 injured

At 23:50 (UTC+8) on 6 February 2018, an earthquake of magnitude 6.4 on the moment magnitude scale hit Taiwan.[2] The epicenter was on the coastline near Hualien, which was the most severely affected area, with a maximum felt intensity of VIII (severe) on the Mercalli intensity scale.[1] At least 17 deaths have been reported, with 285 injured.[3] The maximum foreshock was recorded on 4 February 2018, at 21:56:40. The epicenter was located at Hualien County, Taiwan, reaching a scale of ML 5.8.

Tectonic setting

Taiwan has a history of many strong earthquakes.[1][4] The island is located within a complex zone of convergence between the Philippine Sea Plate and Eurasian Plate. At the location of the earthquake, these plates converge at a rate of 75 mm per year. To the south of Taiwan, oceanic crust of the Eurasian Plate is subducting beneath the Philippine Sea Plate creating an island arc, the Luzon Arc. At Taiwan the oceanic crust has all been subducted and the arc is colliding with continental crust of the Eurasian Plate. To the north of Taiwan the Philippine Sea Plate is in contrast subducting beneath the Eurasian Plate, forming the Ryukyu Arc.[5]

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