伽师强震群震源机制与区域应力场特征

EARTHQUAKE ›› 2002, Vol. 22 ›› Issue (3): 89-94.

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Focal mechanism of Jiashi strong earthquakeswarm and characteristics of the regional stress field

YANG Cheng-rong¹, SHAN Xin-jian^{1, 2}, HE Yu-mei³, ZHU Yan¹, MA Bao-zhu¹

1. Seismological Bureau of Xinjiang Uygur Autonomous Region, Urumqi 83011, China;
2. In-stitute of Geology, CSB, Beijing 100029, China;
3. Institute of Geology and Geophysics, CAS, Beijing 100101, China

Received:2001-08-13 Revised:2002-03-05 Online:2002-07-31 Published:2021-12-21

Abstract

Abstract: Employing the data of short-period Pg and Pn wave onsets from Xinjiang Seismic Network, China Digital Seismic Network, Global Digital Seismic Networks, and those from Mid-Asian region, we obtained 48 focal mechanismsolutions, among them 6 strong earth-quakes from 1997 to 1998 and the others are M_S≥ 4. 0 moderately small earthquakes. We ex-plored the characteristics of regional stress field with the spatial-tem poral distribution and seis-mic intensity of the Jiashi strong earthquakeswarm. The result shows that the principal com-pressional stress field is in the SW-N E direction.

Key words: Jiashi strong earthquakeswarm, Focal mechanismsolution, Seismic intensity, Regional stress field

CLC Number:

P315.3

YANG Cheng-rong, SHAN Xin-jian, HE Yu-mei, ZHU Yan, MA Bao-zhu. Focal mechanism of Jiashi strong earthquakeswarm and characteristics of the regional stress field[J]. EARTHQUAKE, 2002, 22(3): 89-94.

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Focal mechanism of Jiashi strong earthquakeswarm and characteristics of the regional stress field

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