Citation

Wang LY, Chen PY, Wu ZL, Bai TX. Acta Seismol. Sin. Engl. Ed. 2005; 18(2): 180-188.

Affiliation

Inst. of Geophysics, China Earthquake Administration, Beijing 100081, China

Copyright

(Copyright © 2005, Seismological Society of China, Publisher Holtzbrinck Springer Nature Publishing Group)

DOI

unavailable

PMID

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Abstract

In the paper, we analyze 117 moderate-strong earthquakes occurred in Chinese mainland (Msub-s greater than or equal 5.5 in the east and M sub-s greater than or equal 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 M sub-s=5.6 and M sub-s=5.1 Xiuyan earthquakes occurred on Nov. 29, 1999 and Jan.15, 2000.

Language: en