APP  >> Vol. 7 No. 6 (June 2017)

    采用边际谱方法提取地球自由振荡
    Using the Marginal Spectrum Method to Extract Earth Free Oscillation of Strong Earthquakes

  • 全文下载: PDF(5259KB) HTML   XML   PP.173-183   DOI: 10.12677/APP.2017.76024  
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作者:  

李继业,马龙辰:黑龙江省地震局,黑龙江 哈尔滨;
武晓军,张彦吉:哈尔滨市通河地震台,黑龙江 哈尔滨;
任建辉:哈尔滨市防震减灾技术中心,黑龙江 哈尔滨;
孙鹏宇:哈尔滨市延寿地震台,黑龙江 哈尔滨;
孙 强:哈尔滨市阿城地震台,黑龙江 哈尔滨

关键词:
希尔伯特–黄变换边际谱强烈地震自由振荡Hilbert Huang Transform The Marginal Spectrum The Strong Earthquakes Free Oscillation

摘要:

地球自由振荡的研究已成为探查地球内部结构的重要手段之一。本文首次采用基于希尔伯特–黄变换的边际谱方法,利用通河台钻孔应变资料,在没有对数据进行去固体潮的前提下,提取了2008年5月12日汶川M8.0级,2010年2月27日智利M8.8级和2011年3月11日日本本州东海岸附近海域M9.0级强震的地球自由振荡。通过与PREM模型相对比,结果十分接近。其中,汶川地震检测到了24个基频信号,智利地震、日本地震检测到全部76个基频信号,包括0S00S2~0S76。汶川地震检测到的0S2、智利地震检测到的0S60S7等和日本地震检测到的0S20S3等均存在频谱分裂现象。证明边际谱方法可以有效的提取地球自由振荡。

The research of earth free oscillation has become one of important means to ascertain the internal structure of earth. This paper uses the marginal spectrum method based on Hilbert Huang transform for the first time, and the Tonghe station’s borehole strain data without removing solid tide. Then we extracted earth free oscillation mode that are motivated by Wenchuan M8.0 earthquake, Chile M8.8 earthquake and the east coast of Honshu of Japan M9.0 earthquake, and the results are very close to the PREM mode. Among which, the Wenchuan earthquake is tested 24 fundamental frequency modes, the Chile and Japan earthquakes are both 76, which consist of 0S0 and 0S2~0S76. The marginal spectrum method can effectively extract the earth free oscillation because of these strong earthquakes’ mode have spectrum divide phenomenon.

文章引用:
李继业, 武晓军, 马龙辰, 任建辉, 张彦吉, 孙鹏宇, 孙强. 采用边际谱方法提取地球自由振荡[J]. 应用物理, 2017, 7(6): 173-183. https://doi.org/10.12677/APP.2017.76024

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