1986年8月26日门源6.4级地震破裂过程研究
A STUDY ON THE FRACTURE PROCESS OF THE MENYUAN M6.4 EARTHQUAKE OCCURRED ON AUGUST 26,1986
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摘要: 本文根据我国基准台基式仪P波记录,利用终止相和地震波谱综合研究了1986年8月26日青海省门源6.4级地震的震源过程,并求出相应的震源动力学参数。结果表明,门源地震的发震构造为北东50°走向,它朝北东方向单侧破裂,破裂长度为20公里,平均破裂速度为1.83公里/秒。Abstract: In this paper, according to the P wave data recorded by seismographs at the basic stations in China,a comprehensive study is made on the focal process of the Menyuan M6.4 earthquake in Qinghai Province occurred on August 26,1986 and the focal dynamic parameters are obtained.The result shows that the seismic structure of the Menyuan earthquake strikes NE50°, showing an unilateral fracture striking NE, with fracture lenght being 20 km and average fracture velocity being 1.83km/s.
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[1] 徐纪人等,1986年8月26日门源6.4级地震及其强余震的震源机制解,西北地震学报,4,1986. [2] 秦保燕、汪进,组合模式与地震图上的终止相,西北地震学报,9,4,1987. [3] 郭增建等,震源孕育模式的初步讨论,地球物理学报,16,1973. -

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