Abstract
In the paper, we analyze 117 moderate-strong earthquakes occurred in Chinese mainland (M S≥5.5 in the east and M S≥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 S=5.6 and M S=5.1 Xiuyan earthquakes occurred on Nov. 29, 1999 and Jan.15, 2000.
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
References
BAI Tong-xia and CHEN Pei-shan. 1998. The tectonic environment shear stress field in the capital area by use of data of Beijing Digital Seismic Telemetry Network [J]. South China Journal of Seismology, 18(1): 9–13 (in Chinese).
CHEN Pei-shan, BAI Tong-xia, CHENG Jin. 1998. A new method of fast determining earthquake moment magnitude using acceleration or velocity recordings [J]. Chinese J Geophy, 41(Suppl.): 290–297 (in Chinese).
CHEN Yun-tai, WU Zhong-liang, WANG Pei-de et al. 2000. Digital Seismology [M]. Beijing: Seismological Press (in Chinese).
Jones L M, Wang Biquan, Xu Shaoxie. 1982. The foreshock sequence of February 4, 1975, Haicheng earthquake (M=7.3) [J]. J Geophys Res, 87: 4 575–4 584.
LIN Bang-hui and LI Da-peng. 1994. Study on foreshocks and foreshock sequence: Extremum analysis of seismic risks in 23 seismic zones (areas) in Chinese mainland [A]. In: Institute of Geophysics of State Seismological Bureau eds. Collection of Writings of Earthquake Prediction [C]. Beijing: Seismological Press, 105–109 (in Chinese).
LIU Zheng-rong and KONG Shao-lin. 1986. Earthquake frequency decay and earthquake prediction [J]. Journal of Seismological Research, 9(1): 6–8 (in Chinese).
LU Yuan-zhong, CHEN Zhang-li, WANG Bi-quan et al. 1985. Seismological Method in Earthquake Prediction [M]. Beijing: Seismological Press (in Chinese).
MEI Shi-rong and FENG De-yi. 1993. An Introduction to Earthquake Prediction in China [M]. Beijing: Seismological Press, 69–73 (in Chinese).
Ohnaka M. 1993. Critical size of the nucleation zone of earthquake rupture inferred from immediate foreshock activity [J]. J Phys Earth, 41: 45–56.
ZHU Chuan-zhen and WANG Lin-ying. 1996. Study on the characteristics of foreshock and its identification [J]. Chinese J Geophys, 39(1): 80–87 (in Chinese).
Author information
Authors and Affiliations
Additional information
Foundation item: 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.
About this article
Cite this article
Wang, Ly., Chen, Py., Wu, Zl. et al. Characteristics of foreshock and its identification. Acta Seimol. Sin. 18, 180–188 (2005). https://doi.org/10.1007/s11589-005-0065-1
Received:
Revised:
Accepted:
Issue Date:
DOI: https://doi.org/10.1007/s11589-005-0065-1