中强地震平静是汶川8.0级地震前最显著的地震活动异常

Abstract

Abstract: This paper analyzed M_S≥5.0 earthquakes since 1923 in the region of Sichuan. The result shows that strong earthquakes in the region experienced four complete cycle of seismic activities, and there is a 16-year quasi-periodic characteristics for medium to strong earthquake. The quiet period lasted about 5 years. Starting from the 2008 Wenchuan 8.0 earthquake, the study area will enter into the fifth active cycle and continue to about 2024. Quiescence intervals for M5.0~5.9, M6.0~6.9, and M7.0~8.0 events reached the historical highest before the May 12 , 2008 Wenchuan 8.0 earthquake. Long-term quiescence of strong earthquake is the most significant anomaly before the Wenchuan 8.0 earthquake.

Key words: Wenchuan 8.0 earthquake, Quiescence interval, Earthquake Activity, Precursory anormaly

CLC Number:

P315.7

GAO Li-Xin, SUN Jia-lin, ZHANG Hui. Moderate-to-strong Earthquake Quiescence is the Most Significant Seismic Anormaly before the Wenchuan 8.0 Earthquake[J]. EARTHQUAKE, 2010, 30(1): 90-97.

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Moderate-to-strong Earthquake Quiescence is the Most Significant Seismic Anormaly before the Wenchuan 8.0 Earthquake

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