Pre-seismic geomagnetic anomaly and earthquake location

Chieh Hung Chen, Jann Yenq Liu, Pei Ying Lin, Horng Yuan Yen, Katsumi Hattori, Wen Tzong Liang, Yuh Ing Chen, Yih Hsiung Yeh, Xiaoping Zeng

Research output: Contribution to journalArticlepeer-review

34 Scopus citations


Many researchers studied the relationships between appearances of geomagnetic anomalies and their distances to earthquake epicenters or faults. Yet, occasionally some magnetometer stations located nearby earthquake epicenters and/or faults do not observe geomagnetic anomalies. In this paper, a new hybrid system which simultaneously takes the hypocenter and fault plane solution into account is constructed to examine 38 earthquakes interpreted to be associated with geomagnetic anomalies during the period 1988-2001 in Taiwan. The Surface Magnetic Anomaly Reference Tip (SMART) of the new system is used instead of the epicenter or the fault to investigate statistically the distance relationship between the anomalies and the earthquake parameters. Results show that the anomalies gather along the fault and in the belt zone to the SMART. Possible mechanisms causing the anomalies in the two zones are proposed and discussed. Characteristics of the anomaly might shed some light on locations of faults before earthquake occurrences.

Original languageEnglish
Pages (from-to)240-247
Number of pages8
Issue number1-4
StatePublished - Jun 2010


  • Earthquake forecast
  • Focal mechanism
  • Geomagnetic field


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