大同 -阳高二次地震前兆异常的对比分析

EARTHQUAKE ›› 2000, Vol. 20 ›› Issue (z1): 188-195.

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Comparison and analysis of precursor anomaly before two Datong-Yanggao earthquakes

WANG Xiu-wen¹, ZHAO Xin-ping², ZHAO Li-hua², PENG Hao²

1. Seismological Bureau of Shanxi Province, Taiyuan 030002, China;
2. Taihang Middle School, Taiyuan 030006, China

Received:2000-06-05 Revised:2000-06-21 Online:2000-09-30 Published:2022-09-23

Abstract

Abstract: Two moderately strong earthquakes with M_S 6. 1 and M_S 5. 8 occurred in the Datong basin, North Shanxi province in October, 1989 and M arch 1991, respectively. There are great differences in seismic sequences, spatial distribution, and energy release and so on between the two earthquakes.Characteristics of space-time-magnitude in precursory field and mechanism of precursor anomaly are analyzed. The analysis shows that the two earthquakes in Da tong-Yanggao region are resulted f rom strengthening of the regional stress field in North China and increasing and transmitting of stress in alargearea.

Key words: Earthquake precursor, Anomalous characteristics, Datong -Y anggao earthquake

CLC Number:

P315.72

WANG Xiu-wen, ZHAO Xin-ping, ZHAO Li-hua, PENG Hao. Comparison and analysis of precursor anomaly before two Datong-Yanggao earthquakes[J]. EARTHQUAKE, 2000, 20(z1): 188-195.

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Comparison and analysis of precursor anomaly before two Datong-Yanggao earthquakes

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