The strain seismograms of P- and S-waves of a local event recorded by four-gauge borehole strainmeter

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• 作者：Zehua Qiu ; Shunliang Chi ; Zhenming Wang ; Seth Carpenter ; Lei Tang…
• 关键词：Four ; gauge borehole strainmeter (FGBS) ; Strain seismogram ; P wave ; S wave ; Self ; consistency ; Spectrum analysis
• 刊名：Earthquake Science
• 出版年：2015
• 出版时间：June 2015
• 年：2015
• 卷：28
• 期：3
• 页码：209-214
• 全文大小：1,695 KB
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• 作者单位：Zehua Qiu (1)
  Shunliang Chi (2)
  Zhenming Wang (3)
  Seth Carpenter (3)
  Lei Tang (1)
  Yanping Guo (1)
  Guang Yang (4)
  
  1. Institute of Crustal Dynamics, China Earthquake Administration, Beijing, 100085, China
  2. Earthquake Administration of Hebi, Hebi, 458000, He鈥檔an Province, China
  3. Kentucky Geological Survey, University of Kentucky, Lexington, KY, 40506, USA
  4. Guza Seismic Station, Earthquake Administration of Sichuan Province, Kangding, 626001, Sichuan Province, China
  
• 刊物主题：Geophysics/Geodesy;
• 出版者：Springer Berlin Heidelberg
• ISSN：1867-8777

文摘

At a sampling rate of 100 samples per second, the YRY-4 four-gauge borehole strainmeters (FGBS) are capable of recording transient strains caused by seismic waves such as P and S waves or strain seismograms. At such a high sampling rate, data from the YRY-4 strainmeters demonstrate fairly satisfactory self-consistency. The strain tensor seismograms demonstrate the senses of motion of P waves, that is, the type of seismic wave travels in the direction of the maximum normal strain change. The observed strain patterns of S waves significantly differ from those of P waves and should contain information about the source mechanism. Spectrum analysis shows that the strain seismograms are consistent with conventional broadband seismograms from the same site.