利用接收函数H-k-c叠加方法研究新源地震台下方地壳厚度和泊松比

RESEARCH ON CRUSTAL THICKNESS AND POISSO N’S RATION UNDER XINYUAN SEISMIC STATION BY RECEIVE FUNCTION H-k-c METHOD

以新源地震台2016-2020年记录的震中距在30°~90°的远震波形数据为基础,用时间域迭代反褶积方法提取远震P波接收函数,采用一种具有谐波校正的广义接收函数H-k叠加方法H-k-c计算台站下方的地壳厚度及泊松比。结果表明H-k-c方法明显改善地壳厚度和泊松比的估计,新源地震台下方地壳平均厚度约56.3 km,泊松比约0.25。

Based on the teleseismic waveform data recorded by Xinyuan Seismic Station from 2016 to 2020 with a Epicentral distance of 30°~90°,the teleseismic P-wave receiver function is extracted by time domain iterative deconvolution method,and the crustal thickness and Poisso n’s ratio under the station are calculated by using a generalized receiver function H-k stacking method H-k-c with harmonic correction.The results indicate that the H-k-c method significantly improves the estimation of crustal thickness and Poisso n’s ratio,with an average crustal thickness of about 56.3 km and a Poisso n’s ratio of about 0.25 below Xinyuan Seismic Station.