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CEA released an intensity map of the Lushan, Sichuan “4.20” Ms7.0 earthquake

2014/5/27 13:23:32

On April 20, 2013, an Ms7.0 earthquake hit Lushan County, Yaan City, Sichuan Province. By 12: 00 April 25, it had killed 196 people and injured 11470. After occurrence of the earthquake, CEA assembled more than 300 technicians in the seismic sector to form a field emergency response work team. They carried out disaster investigation and evaluation in the affected area, including damage of buildings, lifeline intrastructure and industrial and mining enterprises in 21 counties (cities and districts) and investigated disasters at 360 survey points and 231 sampling sites.

By now a seismic intensity map has been completed in comprehensive consideration of field investigations, interpretation of remote sensing images and observation records of the earthquake. Now we publish it.


Intensity map of Sichuan Lushan “4.20” Ms 7.0 violent earthquake

http://www.eq-igl.ac.cn/admin/upload/Photos/科研动

态/S20130426100404360078.jpg

Explanation on the seismic intensity map:

The maximum intensity of this earthquake is scaled IX degree. The long axis of the isoseismal lines is in NE direction. The total area of VI degree and higher is 18682km2.

The area of IX degree stretches from north of Taiping town and Baisheng township of Lushan county in the northeast to the Xiangyang village of Luyang town in the southwest. Its long semi axis is 11.5km, short semi axis is 5.5km and area is 208 km2.

The area of VIII area stretches fromthe Qishuping village, Baosheng township, Lushan county in the northeast to Xingye township of Tianquan county in the southwest, Lingguan town of Baoxing county in the northwest and the urban area of Mingshan in the southeast. Its long semi axis is 29km, short semi axis is 17.5km and area is 1418km2.

The area of VII area stretches from Dachuan town of Lushan county in the northeast to Gangshan village, Yandao town, Xingjing county in the southwest, Zishi township of Tianquan county in the northwest and Hanwang township of Hongya county in the southeast. Its long semi axis is 56 km, short semi axis is 33 km and area 4029km2.

The area of VI area stretches from Lijiashan village, Xinchang town, Dayi county in the northeast, Lianghe township of Ganluo county in the southwest, Lan’an township of Luding county in the northwest and Yangchang town of Danling county in the southeast. Its long semi axis is 95 km, short semi axis is 64 km and area is 13027km2.