本文選題：同震形變 + 閩粵地區(qū)��； 參考：《大地測量與地球動力學》2017年12期

【摘要】：基于閩粵地區(qū)10個地形變觀測點40個測項的同震形變波記錄,利用幅度比值和小波多尺度分析方法探討其記錄特點和傳導機制,結(jié)果顯示:1)同震形變波到時與震中距有關(guān),波形記錄含有d-P和d-S波,不同測項記錄到的波形不一致,同測項的記錄波形相似;2)幅度比值在一定程度上與震源方位有關(guān),進一步反映其各向異性;3)通過互(自)相關(guān)計算和濾波處理,能識別出同震形變波的頻帶為0.02~0.04 Hz,峰值在0.025Hz附近;4)智利地震形變波序列小波能譜為64~254s,能量集中在128~254s;而尼泊爾地震形變波在不同測點區(qū)別較大,潮州臺為16~32s,廈門臺為16~64s。研究結(jié)果表明,形變記錄中除面波外還包含體波成分,不同震源機制引起的同震形變波傳導機制可能存在各向異性,這對于開展地震引發(fā)應變等研究有借鑒意義。
[Abstract]:Based on 40 coseismic deformation wave records of 10 topographic deformation observation points in Fujian and Guangdong, the characteristics and conduction mechanism of coseismic deformation wave are discussed by using amplitude ratio and wavelet multiscale analysis method. The results show that the arrival time of coseismic deformation wave is related to epicentral distance. The waveform record contains d-P and d-S waves, and the waveform recorded by different items is inconsistent. The amplitude ratio of the recorded waveform of the same item is similar to that of the source to a certain extent, which is related to the location of the source. Further reflecting its anisotropy 3) through mutual (autocorrelation) calculation and filtering, The frequency band of coseismic deformation wave is 0.02 ~ 0.04 Hz and the peak value is near 0.025Hz.) the wavelet spectrum of Chile seismic deformation wave sequence is 64 ~ 254s, and the energy is concentrated at 128m ~ 254s, while the seismic deformation wave of Nepal is different from other seismic deformation waves at different measuring points, which is 16 ~ 32s in Chaozhou station and 1664s in Xiamen station. The results show that the deformation records contain bulk wave components in addition to surface waves, and anisotropy may exist in the co-seismic deformation wave conduction mechanism caused by different focal mechanisms, which is useful for the study of earthquake induced strain.
【作者單位】： 廣東省地震局汕頭地震臺;中國地震臺網(wǎng)中心;
【基金】：國家自然科學基金(41374080)~~
【分類號】：P315.7
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本文編號：1853855