汶川8级大地震活动断裂滑动速率异常低的比较讨论

Abstract

Abstract: This paper comparatively discusses the active fault slip rates of 8 great intra-continental shallow thrust earthquakes occurred in the East Asia Triangular Seismic Region based on the collected slip rate data. Preliminary analysis shows that the average vertical slip or shortening rates on the shallow thrust faults are less than 12 mm/a in the region . The great Wenchuan M_S8.0 earthquake of May 12, 2008, Sichuan province, China, occurred in the Longmen Shan active fault with abnormal low slip rate(0.2～1.0 mm/a). The relationship between earthquake magnitude and slip rate is not linear simply. Earthquake magnitude might be related to the geological ages, scale(length, width and depth), rate and history,medium property, stress-strain relation and geodynamic condition of the earthquake faults, which needs further and deep study.

Key words: Wenchuan M_S8.0 earthquake, Fault slip rate, Longmen Shan fault zone, East Asia Triangular Seismic Region

CLC Number:

P315.7

FU Zheng-xiang, LU Xiao-jian, JIN Xue-shen ZHAO Hui-cheng, DAI Ying-hua, HAO Ping. Comparative Discussion of the Abnormal Low Slip Rate on the Active Fault of the Wenchuan M_S8.0 Earthquake[J]. EARTHQUAKE, 2010, 30(2): 1-9.

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Comparative Discussion of the Abnormal Low Slip Rate on the Active Fault of the Wenchuan M_S8.0 Earthquake

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Comparative Discussion of the Abnormal Low Slip Rate on the Active Fault of the Wenchuan MS8.0 Earthquake

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Comparative Discussion of the Abnormal Low Slip Rate on the Active Fault of the Wenchuan M_S8.0 Earthquake