中国数字地震台网记录的昆仑山口西地震的球型自由振荡

Abstract

Abstract: Based on VHZ data recorded by 7 stations of China digital seismograph network (CDSN) for Nov. 14, 2001, earthquake in the west of the Kunlun mountain pass, we extracted spherical mode of ₀S₄~₀S₇₆ of the earth free oscillation using power spectral density (PSD) estimation. Because the frequency response of seismograph in China digital seismograph network suppress information of solid tide, we do not need to remove the solid tide in our procession. Our result is nearly consistent with frequency of the modes of preliminary reference earth model (PREM). The data of the earth spherical free oscillation can be used to invert focal mechanism of this earthquake and to explore the inner structure of the earth.

Key words: China digital seismograph network, Earthquake in the west of the Kunlun mountain pass, Power spectral density estimation, Spherical free oscillation of the earth

CLC Number:

P315.61

WAN Yong-ge, ZHOU Gong-wei, GUO Yan-ping. Spherical mode of the earth free oscillation excitated by the earthquake in the west to the Kunlun mountain pass recorded by China digital seismograph network[J]. EARTHQUAKE, 2005, 25(1): 31-40.

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Spherical mode of the earth free oscillation excitated by the earthquake in the west to the Kunlun mountain pass recorded by China digital seismograph network

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