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福建仙游5.0级地震序列波谱变化研究
STUDY ON SEISMIC WAVE SPECTRUM OF XIANYOU 5.0EARTHQUAKE SEQUENCE
- DOI:
- 作者:
- 蔡杏辉 段刚
Cai Xinghui, DuaiGang
- 作者单位:
- 中国福州350003 福建省地震局
The monitoring center of Fujian Seismological bureau Fuzhou 35003
- 关键词:
- 仙游地震序列；仙游ML5.0地震；地震波谱；拐角频率比
Xianyou Earthquake Sequence；Xianyou ML5.0 earthquake ;Seismic Wave Spectrum； Corner Frequency Ratio
- 摘要:
-
利用福建仙游震区附近的3个数字地震台记录的仙游地震序列波形资料，采用PITSA软件，对2013年9月4日仙游ML5.0地震发生前后73个前、余震作波谱分析。结果表明：3个地震台的拐角频率比值在主震前均出现较明显的下降趋势，不同台站间主震前后的变化形态存在较明显差异。
By using wave datum of Xianyou earthquake sequence recorded by three stations near the Xianyou epicenter region in Fujian，we use the PITSA software to analyze the 73 earthquakes of Xianyou ML5.0 earthquake sequence that occurred on Sep.4,2013 by spectral analysis.The result shows that the corner frequency ratio all have obvious dropping on 3 stations before the main earthquake,and it is different between different stations before and after the main earthquake.
