The Earth’s Free Spherical Oscillations of the Great Japan Earthquake-Reference-Cited by-同舟云学术

The Earth’s Free Spherical Oscillations of the Great Japan Earthquake

Published:2012-12 Issue: Volume:622-623 Page:1664-1669
ISSN:1662-8985
Container-title:Advanced Materials Research
language:
Short-container-title:AMR

Author:

Wu Ye¹,Wan Yong Ge¹,Ding Liang¹

Affiliation:

1. Institute of Disaster-Prevention Science and Technology

Abstract

An M9.0 earthquake struck Japan on March 11, 2011 and the strong earthquake made continuous oscillation of the Earth. We first studied the Earth’s free oscillations using observations of VHZ channel of China Digital Seismic Network (CDSN). Since the frequency response of seismograph in CDSN suppresses the information of low frequency signal, we do not need to remove the solid tide in our data processing. We extracted 72 clear spherical modes of (0S0,0S2to0S72) of the Earth’s free oscillation and 21 harmonic modes and they are consistent and nearly same with the frequencies of the modes of Preliminary Reference Earth Model (PREM). Spectral splitting phenomenon is observed obviously in0S2,0S3,0S4and1S2free oscillation modes.

Publisher

Trans Tech Publications, Ltd.

Subject

General Engineering

Link

https://www.scientific.net/AMR.622-623.1664.pdf

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