An earthquake of magnitude 5.1 occurred on January 30, 2010 at 21:36:58 ( UTC ) in the east of Sichuan Province ( China ), 28.1 km southeast of Suining District [1] . The earthquake hypocenter was located at a depth of 10.0 kilometers [1] .
| Sichuan Earthquake (2010) | |
|---|---|
 | |
| date and time | 01/30/2010 21:36:58 ( UTC ) |
| Magnitude | 5.1 Mw [1] |
| Depth hypocenter | 10.0 km [1] |
| Location epicenter | |
| Affected countries (regions) |  China |
| Tsunami | not |
| Injured | 1 dead, 16 injured [2] [3] |
| Economic damage | US $ 66.56 million [3] |
| Aftershocks | not |
Tectonic conditions of the region
The earthquake occurred in the central part of the Sichuan depression , with an epicenter in the structural zone of Moxi – Longvsi and a focal depth of 10 km. Based on a structural interpretation of the seismic profiles of this area, scientists discovered a tectonic fault located at a depth of 9-10 km in rocks of pre-Dinian age. The fault is oriented from the northwest to the southeast. The rocks in the fault are pushed from the northwest to the southeast and form a fold of the near-fault bend ( English fault-bend fold ) in the region, with a length of about 4 kilometers [4] .
Accordingly, the formation of the Moxi anticline is associated with regional basal failure (detachment). Since the epicenter of the earthquake was recorded on the slope of detachment, it is believed that the 2010 earthquake was caused by the reactivation of this basal failure. Starting from the late Jurassic period , under the influence of regional tectonic stress, the fault moved its activity from the Lunmyn mountains to the inner regions of the Sichuan Depression and the southwestern foothills of the Huangshan [4] .
Consequences
As a result of the earthquake, 1 person was killed, 16 people were injured. In more than 100 houses were destroyed, and thousands damaged [2] [3] . The economic damage from the earthquake amounted to 66.56 million US dollars [3] .
Notes
- ↑ 1 2 3 4 “M 5.1 - eastern Sichuan, China” . earthquake.usgs.gov. Circulation date May 8, 2019.
- ↑ 1 2 “M 5.1 - eastern Sichuan, China” . earthquake.usgs.gov. Circulation date May 8, 2019.
- ↑ 1 2 3 4 James Daniell. Damaging Earthquakes Database. 2010 - The Year in Review . Australian Earthquake Engineering Society (January 14, 2011).
- ↑ 1 2 Renqi, 2011 .
Literature
- LU Renqi, HE Dengfa, John Suppe, MA Yongsheng, Guan Shuwei. The Seismogenic Structure of the 2010 Suining Ms 5.0 Earthquake and its Geometry, Kinematics and Dynamics Analysis (Eng.) // Acta Geologica Sinica - English Edition. - 2011. - Vol. 85 , iss. 6 . - P. 1277–1285 . - ISSN 1755-6724 . - DOI : 10.1111 / j.1755-6724.2011.00587.x .