In:
Advanced Materials Research, Trans Tech Publications, Ltd., Vol. 622-623 ( 2012-12), p. 1664-1669
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 ( 0 S 0 , 0 S 2 to 0 S 72 ) 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 in 0 S 2 , 0 S 3 , 0 S 4 and 1 S 2 free oscillation modes.
Type of Medium:
Online Resource
ISSN:
1662-8985
DOI:
10.4028/www.scientific.net/AMR.622-623
DOI:
10.4028/www.scientific.net/AMR.622-623.1664
Language:
Unknown
Publisher:
Trans Tech Publications, Ltd.
Publication Date:
2012
detail.hit.zdb_id:
2265002-7
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