1 Institute of Geophysics, China Earthquake Administration, Beijing 100081, China 2 Chongming Observatory, Earthquake Administration of Shanghai Municipality, Shanghai 202164, China 3 Kashi Observatory, Earthquake Administration of Xinjiang Uygur Autonomous Region, Urumuqi 844000, China 4 Jinghai Observatory, Earthquake Administration of Tianjin Municipality, Tianjin 301600, China
Detection of ULF electromagnetic emissions as a precursor to two earthquakes in China
1 Institute of Geophysics, China Earthquake Administration, Beijing 100081, China 2 Chongming Observatory, Earthquake Administration of Shanghai Municipality, Shanghai 202164, China 3 Kashi Observatory, Earthquake Administration of Xinjiang Uygur Autonomous Region, Urumuqi 844000, China 4 Jinghai Observatory, Earthquake Administration of Tianjin Municipality, Tianjin 301600, China
摘要The geomagnetic data recorded by Kashi and Jinghai observatories in China were analyzed with improved polarization method. We compared the result around 0.01 Hz which is thought to be useful to detect the ULF anomaly with the result around 0.1 Hz which was inferred from the earthquake depth according to the skin effect, and found that 0.1 Hz is more proper to detect the ULF anomaly for both earthquakes studied in this paper.
Abstract：The geomagnetic data recorded by Kashi and Jinghai observatories in China were analyzed with improved polarization method. We compared the result around 0.01 Hz which is thought to be useful to detect the ULF anomaly with the result around 0.1 Hz which was inferred from the earthquake depth according to the skin effect, and found that 0.1 Hz is more proper to detect the ULF anomaly for both earthquakes studied in this paper.
基金资助:the Special Project for Earthquake Research (200708033)
通讯作者:
Qi Li
E-mail: darcyli@163.com
引用本文:
Qi Li, Peiyu Zhu, Alimjan Mamatemin, Xuegong Xu. Detection of ULF electromagnetic emissions as a precursor to two earthquakes in China[J]. 《地震学报》英文版, 2011, 24(6): 601-607.
Qi Li, Peiyu Zhu, Alimjan Mamatemin, Xuegong Xu. Detection of ULF electromagnetic emissions as a precursor to two earthquakes in China. Earthquake Science, 2011, 24(6): 601-607.
