地震学报（英文版）2005，Vol.18Issue(2)：180-188,9.
Characteristics of foreshock and its identification
Characteristics of foreshock and its identification
摘要
Abstract
In the paper, we analyze 117 moderate-strong earthquakes occurred in Chinese mainland (MS≥5.5 in the east and MS≥6.0 in the west) since 1970, among them, 11 earthquakes (about 9%) have direct foreshocks and 63 earthquakes (about 51%) have generalized foreshocks. The predominant time interval between foreshock and main earthquake is no more than 30 days with a spatial distance less than 50 km and a magnitude difference over 1. From the digital seismic data in Liaoning Province, we know that direct foreshock had an obvious shear-stress background before the MS=5.6 and MS=5.1 Xiuyan earthquakes occurred on Nov. 29, 1999 and Jan.15, 2000.关键词
direct foreshock/generalized foreshock/ambient shear stressKey words
direct foreshock/generalized foreshock/ambient shear stress分类
天文与地球科学引用本文复制引用
WANG Lin-ying,CHEN Pei-yan,WU Zhong-liang,BAI Tong-xia..Characteristics of foreshock and its identification[J].地震学报（英文版）,2005,18(2):180-188,9.基金项目
Key Project of State Science and Technology in the tenth Five-year Plan (2001BA601B01-01-02).Contribution No. 05FE3008, Institute of Geophysics, China Earthquake Administration. （2001BA601B01-01-02）
