中国地震电磁扰动观测研究

Abstract

Abstract: Electromagnetic disturbance observation has been started after Tangshan M_S7.8 earthquake occurred in 1976, and more than 170 observation stations have been built. Observational frequency value has been changed from wide frequency band to ULF and several kHz or several tens of kHz. It decreases the disturbances and at the same time, the data are more believable. Modern observation instruments more and more adopt digital recording and the data are easier to analyze and process. Several earthquake cases show that the signs of the electromagnetic disturbance do not appear during the earthquake. The amplitude of anomaly is similar to the result of theory computation and experiment. The selection of ULF frequency band is beneficial to remove disturbance.

Key words: Electromagnetic disturbance, Electromagnetic anomaly, Short-impending precursor, Observational station

CLC Number:

P315.7

GUAN Hua-ping, XIAO Wu-jun, LI Mei. The observation research of electromagnetic disturbance in China[J]. EARTHQUAKE, 2007, 27(增刊): 71-79.

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The observation research of electromagnetic disturbance in China

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