An earthquake of magnitude 6.5 occurred on April 26, 2010 at 02:59:52 ( UTC ) in the Philippine Sea of the Pacific Ocean , 245.9 km south-southwest of Ishigaki ( Japan ) and 263 km east-south east of the city of Taitung ( Taiwan ) [2] . The earthquake hypocenter was located at a depth of 22 km [1] .
| Earthquake Southeast of Taiwan (2010) | |
|---|---|
 | |
| date and time | 04/26/2010 02:59:52 AM ( UTC ) |
| Magnitude | 6.5 Mw [1] |
| Depth hypocenter | 22.0 km |
| Location epicenter | |
| Affected countries (regions) |  Republic of China |
| Tsunami | not |
| Injured | not |
| Economic damage | not |
| Aftershocks | not |
The earthquake was felt in Taipei , Taichung and other settlements of Taiwan: Hualien , Yilan , Miaoli , Nantou , Pindong , Tainan , Yunlin , Penghu . Tremors were also felt in Quanzhou ( China ); in Japan: on the islands of Ishigaki , Khaterum , Iriomote , Yonaguni , Ikema , Miyako , Sakishima [3] .
As a result of the earthquake, there were no reports of casualties and destruction [3] .
Tectonic conditions of the region
In the complex tectonics surrounding the Philippine Islands , interactions of the Pacific , Sond and Eurasian plates with the Philippine Sea Plate (PSP) predominate. The last plate is unique because it is almost everywhere surrounded by zones of convergence of the plates [4] .
In the east and southeast, the Pacific plate subducts beneath the Philippine plate, the subduction zone is located in the Izu – Bonin gutters, Mariansky and gutters. Here, the subduction zone demonstrates high rates of seismic activity at depths of more than 600 km, although no strong earthquakes (magnitude> 8.0) were observed, probably due to weak coupling along the plate interface [4] .
In the northeast, in the Nankai and Ryukyu trenches under the Philippine Plate, Japan and the eastern edge of the Eurasian Plate subduct. This plate interaction zone extends west to Taiwan. In the Nankai part of this subduction zone, several major earthquakes occurred on the outskirts of the Philippine Plate, including two earthquakes [4] and [4] .
Along the western boundary of the interaction between the Philippine and Sunda plates, a wide and active tectonic system arises, extending on both sides of the Philippine Islands chain. The region is characterized by opposite directions of subduction zones on the eastern and western sides of the islands, and the archipelago is cut by a large transformation structure: the Philippine Trench . Subduction of plates of the Philippine Sea occurs on the eastern edge of the islands along the Philippine Trench and its northern extension, the East Luzon Trough. On the west side of Luzon, the Sunda Plate extends eastward along a series of troughs, including the Manila Trench in the north, the smaller Negros Trough in the central Philippines, and the Sulu and Cotabato troughs in the south [4] .
Seismic activity in the 20th and early 21st centuries along the borders of the Philippine Sea Plate led to seven strong (magnitudes> 8.0) earthquakes and 250 large (magnitudes> 7) events. Among the most devastating events have occurred: earthquakes in Kanto in 1923 , and in Kobe in 1995 in Japan; earthquakes in Taiwan in 1935 and 1999 ; 7.6 and the 7.6 [4] .
Notes
- ↑ 1 2 “M 6.5 - southeast of Taiwan” . earthquake.usgs.gov. Date of treatment July 5, 2019.
- ↑ "M 6.5 - southeast of Taiwan" . earthquake.usgs.gov. Date of treatment July 5, 2019.
- ↑ 1 2 “M 6.5 - southeast of Taiwan” . earthquake.usgs.gov. Date of treatment July 5, 2019.
- ↑ 1 2 3 4 5 Smoczyk et al., 2013 .
Literature
- Smoczyk, GM, Hayes, GP, Hamburger, MW, Benz, HM, Villaseñor, Antonio, and Furlong, KP Seismicity of the Earth 1900–2012 Philippine Sea Plate and proximity (Eng.) // US Geological Survey Open-File Report 2010 –1083-M. - 2013.