2017 Jiuzhaigou earthquake
| Jiuzhaigou earthquake | |||
|---|---|---|---|
|
|||
| date | 2017-08-08 | ||
| Time | 13:19:49 UTC | ||
| Magnitude | 6.5 M W | ||
| depth | 9 km | ||
| epicenter | 33 ° 11 '35 " N , 103 ° 51' 18" E | ||
| country | People's Republic of China | ||
| Affected places | |||
| dead | 25th | ||
| Injured | 525 | ||
The 2017 Jiuzhaigou earthquake was a powerful earthquake on August 8, 2017 at 1:19 p.m. UTC (9:19 p.m. local time ) in the Chinese province of Sichuan . The hypocenter of the quake with a magnitude M W 6.5 on the moment-magnitude scale was 9 km deep in the Jiuzhaigou nature reserve , around 100 kilometers west of Longnan . The China Earthquake Networks Center gave the magnitude as 7.0.
Tectonic overview
The earthquake of August 8, 2017 with a magnitude M W 6.5 in the north of the Chinese province of Sichuan occurred as a result of a shallow blade displacement in the interior of the Eurasian plate . The focal point solution indicates that the event was triggered by either a sinistral trending southeast or a dextral leaf displacement trending northeast.
The earthquake occurred several hundred kilometers northeast of the convergent plate boundary between the Indian and Eurasian plates, where the Indian plate is moving northward relative to the Eurasian plate at a speed of approximately 46 mm / year. This convergence drives the uplift of the Himalayas and the highlands of Tibet , a vast region of thickened earth's crust that is uplifting about 10mm / year. The Tibetan Plateau expands to the east, as a result of which it is an area of east-west extension and eastward trending crustal movement within a larger region of generally north-south convergence. At the edge of the plateau east of the August 8 quake, the crust beneath the highlands of Tibet converges with the thick crust beneath the Sichuan Basin and southeastern China. The earthquake reflects the interplay of these great tectonic forces.
Within a radius of 250 km from the earthquake of August 8, 2017, 12 earthquakes with a magnitude greater than 6 have occurred in the last 100 years. The most significant event in the recent past was the Chengdu or Sichuan earthquake on May 12, 2008 , not quite 250 km south of the earthquake on August 8, which reached magnitude M W 7.9 and in which 69,000 people died and nearly 400,000 more were injured; more than 5 million homes were destroyed and more than 45 million people in China were affected. The 2008 earthquake and its strong aftershocks occurred at the Longmenshan Fault south and southeast of the earthquake on August 8, 2017. In August 1976, three strong earthquakes with magnitudes M 6.9, M 6.4 and M 6.7 struck the Region about 50 km southeast of the earthquake on August 8, 2017. 41 people were killed.
Victims and damage
The earthquake killed 25 people and injured 525. A total of 176,000 people were affected by the quake.
More than 73,000 houses were damaged and 76 collapsed.
supporting documents
- ↑ a b c M 6.5 - 36km WSW of Yongle, China ( English ) In: Earthquake Hazards Program . United States Geological Survey. August 8, 2017. Accessed January 12, 2020.
- ↑ 四川 阿坝州 九寨沟 县 7.0 级 地震 ( Chinese ) 中国 地震 台 网. August 8, 2017. Retrieved August 9, 2017.
- ↑ Sichuan earthquake kills 25, injuring 525. In: news.cgtn.com . August 14, 2017, accessed January 12, 2020.