利用JCZ-1T地震计BB通道观测数据检测地球自由振荡

发布时间：2018-04-02 22:09

  本文选题：JCZ-T地震计　切入点：地球自由振荡　出处：《大地测量与地球动力学》2017年12期

【摘要】：采用库尔勒台JCZ-1T地震计BB通道垂直向的观测数据,利用功率谱密度估计方法,在没有对观测资料进行任何改正的情况下,获取2016-03-02印尼苏门答腊岛海域7.8级和2016-04-17厄瓜多尔7.5级大地震激发的0S7~0S60基频球型自由振荡,并与PREM模型理论值进行对比分析。结果表明,实测值与理论值相吻合,除部分振型与理论值偏差较大以外,其余振型与理论值偏差均小于0.1%。印尼苏门答腊岛海域7.8级地震所检测的球型振荡能量频谱分布及振型与厄瓜多尔7.5级地震所检测的球型振荡有一定差别,前者所能检测的振型数量相对较多。
[Abstract]:Using the vertical observation data of BB channel of JCZ-1T seismograph at Korla station, using the method of power spectrum density estimation, without any correction of the observed data,The 0S7~0S60 fundamental frequency spherical free oscillation induced by the earthquake of magnitude 7.8 and M = 7.5 in Sumatra, Indonesia, 2016-03-02 and 2016-04-17, respectively, is obtained and compared with the theoretical values of the PREM model.The results show that the measured values are in good agreement with the theoretical values, except for the partial vibration modes and the theoretical values, the deviations between the other modes and the theoretical values are all less than 0.1.The energy spectrum distribution and vibration pattern of the spherical oscillation detected by the Sumatra earthquake with M = 7.8 in Indonesia are different from those detected by the earthquake of M = 7.5 in Ecuador, and the number of the modes detected by the former is more than that measured by the earthquake of M = 7.5 in Ecuador.
【作者单位】： 新疆维吾尔自治区地震局库尔勒地震台;
【基金】：新疆地震科学基金(201616)~~
【分类号】：P315.7
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本文编号：1702329