本文選題：JCZ-T地震計(jì)　切入點(diǎn)：地球自由振蕩　出處：《大地測量與地球動力學(xué)》2017年12期

【摘要】：采用庫爾勒臺JCZ-1T地震計(jì)BB通道垂直向的觀測數(shù)據(jù),利用功率譜密度估計(jì)方法,在沒有對觀測資料進(jìn)行任何改正的情況下,獲取2016-03-02印尼蘇門答臘島海域7.8級和2016-04-17厄瓜多爾7.5級大地震激發(fā)的0S7~0S60基頻球型自由振蕩,并與PREM模型理論值進(jìn)行對比分析。結(jié)果表明,實(shí)測值與理論值相吻合,除部分振型與理論值偏差較大以外,其余振型與理論值偏差均小于0.1%。印尼蘇門答臘島海域7.8級地震所檢測的球型振蕩能量頻譜分布及振型與厄瓜多爾7.5級地震所檢測的球型振蕩有一定差別,前者所能檢測的振型數(shù)量相對較多。
[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.
【作者單位】： 新疆維吾爾自治區(qū)地震局庫爾勒地震臺;
【基金】：新疆地震科學(xué)基金(201616)~~
【分類號】：P315.7
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本文編號：1702329