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EARTHQUAKE ›› 2007, Vol. 27 ›› Issue (4): 43-50.

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Correlation analysis of the parallel tidal observation at Tai'an station and its significance for anomaly judgments

WANG Mei1,2, NIU An-fu3, JI Ai-dong2, MAO Yu-hua2   

  1. 1. University of Science and Technology of China, Hefei 230026;
    2. Earthquake Administration of Shandong Province, Jinan 250014;
    3. China Earthquake Networks Center, Beijing 100036, China
  • Received:2007-06-12 Revised:2007-07-20 Online:2007-10-31 Published:2021-10-29

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Abstract: The curve shape and tidal parameter (mainly phase lag) of parallel observation of different components, observed at Tai'an station, have been compared with each other in this paper. The results show a great correlation between parallel observations of different instruments. Considering the frequency response traits of each kind of instruments, several remarkable deformation changes recorded by different instruments have been analyzed synthetically. Instead of earthquake anomalies, the characteristics of these changes all indicate that they were caused by the instabilities of instruments or partly change of observational condition. The study manifested the significance for the judgments of earthquake anomaly by parallel observation.

Key words: Tai'an station, Earth tide, Correlation, Anomaly judgment

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