An earthquake on the Ryukyu Islands with a magnitude of 5.7 occurred on January 15, 2010 at 11:08:38 ( UTC ) on the Ryukyu Islands ( Japan ), 151.3 km west-north-west of the nearest settlement of Naha . The earthquake hypocenter was located at a depth of 139.1 kilometers [1] . An earthquake was felt in Urasoe , Tyatan , Ginovan and other settlements of Okinawa Prefecture [2] .
| Ryukyu Islands Earthquake (2010) | |
|---|---|
 | |
| date of and time | 01/15/2010 11:08:38 ( UTC ) |
| Magnitude | 5.7 Mw [1] |
| Depth hypocenter | 139.1 km [1] |
| Location epicenter | |
| Affected countries (regions) |  Japan |
| Tsunami | no |
| Injured | no |
| Economic damage | no |
| Aftershocks | no |
There were no reports of casualties or destruction.
Tectonic conditions of the region
The Philippine tectonic plate borders on the larger Pacific and Eurasian plates and the smaller Sunda plate . The Philippine plate is unusual in that its borders represent almost all of the convergence zones of the plates. The Pacific Plate is subducted into the mantle south of Japan, under the island arcs of Izu-Bonin and Mariana , which extend over 3,000 km along the eastern border of the Philippine Plate. This subduction zone is characterized by rapid convergence of plates and high seismicity spreading to depths of more than 600 km. From this vast convergence zone, strong (M> 8.0) earthquakes can occur here. It is believed that the low release of seismic energy is the result of weak coupling along the plate interface [3] .
South of the Mariana Arc, the Pacific Plate is subducted beneath the Yap Islands along the Yap Trench. The Ryukyu subduction zone is associated with a similar zone, the Okinawa Depression [4] .
Notes
- β 1 2 3 "M 5.7 - Ryukyu Islands, Japan" . Date of treatment April 28, 2019.
- β "M 5.7 - Ryukyu Islands, Japan" . earthquake.usgs.gov. Date of treatment April 28, 2019.
- β CH Scholz, J. Campos. On the mechanism of seismic decoupling and back arc spreading at subduction zones ( Journal ) // Journal of Geophysical Research: Solid Earth. - 1995. - Vol. 100 , iss. B11 - P. 22103-22115 . - ISSN 2156-2202 . - DOI : 10.1029 / 95JB01869 .
- β "M 5.7 - Ryukyu Islands, Japan" . earthquake.usgs.gov. Date of treatment April 28, 2019.