| 利用体应变观测智利8.8级大地震激发的地球球型自由振荡 |
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| 引用本文： | 杨跃文,任佳,蒋翠荣,温超,薛志芳.利用体应变观测智利8.8级大地震激发的地球球型自由振荡[J].地震地磁观测与研究,2011,32(1):33-38. |
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| 作者姓名： | 杨跃文 任佳 蒋翠荣 温超 薛志芳 |
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| 作者单位： | 杨跃文,Yang Yuewen(中国云南,650041,丽江地震台);任佳,蒋翠荣,Ren Jia,Jiang Cuirong(中国河北,075000,张家口中心地震台);温超,Wen Chao(中国石家庄,050021,河北省地震局);薛志芳,Xue Zhifang(中国河北,066000,秦皇岛中心地震台) |
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| 摘 要： | 用河北省体应变的数字化观测资料,利用功率谱密度估计方法,在没有对资料进行处理的情况下,准确获得了2010年2月27日智利8.8级大地震激发的0S5-0S35摹频球型自由振荡,并与地球初步参考模型(PREM)的理论自由振荡频率进行对比,发现实测振荡频率与PREM预测的振荡频率基本符合.河北省体应变的数字化观测资料的确可以...
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| 关 键 词： | 体应变 智利8.8级大地震 地球自由振荡 球型振荡 |
Detecting the free oscillation of the Earth excited by Chile M 8.8 earthquake through the observational data of digital borehole dilatometer |
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| Yang Yuewen,Ren Jia,Jiang Cuirong,Wen Chao,Xue Zhifang.Detecting the free oscillation of the Earth excited by Chile M 8.8 earthquake through the observational data of digital borehole dilatometer[J].Seismological and Geomagnetic Observation and Research,2011,32(1):33-38. |
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| Authors: | Yang Yuewen Ren Jia Jiang Cuirong Wen Chao Xue Zhifang |
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| Institution: | 4) Lijiang Seismic Station, Yunnan Province 674100 2) Zhangjiakou Central Seismic Station, Hebei Province 075000, China 3) Earthquake Administration of Hebei Province, Shijiazhuang 050021, China 4) Qinhuangdao Central Seismic Station, Hebei Province 066000, China |
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| Abstract: | By power spectrum density estimation, we extract the fundamental-frequency, spheroidal, free oscillation（0S5--0S35） of the Earth excited by the M 8.8 Chile great earthquake on 27 February 2010 from the data of digital Borehole Dilatometer of Hebei province without elimi- nating the Earth＇s tide. Comparing the period of the extracted oscillation with that of the theoretical oscillation from the Preliminary Reference Earth Model （PREM）, we find that they are accordant with each other. This proves that extracting the free oscillation of the Earth from the data of digital borehole dilatometer is a new approach. |
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| Keywords: | borehole dilatometer M 8 8 Chile earthquake free oscillation of the Earth spherical oscillation |
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