A statistical study of Seismo-Ionospheric Precusors of magnitude 5.0 and greater during 1994-1999 in Taiwan

Yen hao Huang1, Chi-Hsuan Huang1, Jann-Yenq G Liu1 and Yuh-Ing Chen2, (1)NCU National Central University of Taiwan, Jhongli, Taiwan, (2)Graduate Institute of Statistics, National Central University, Taoyuan, Taiwan
Abstract:
Statistical evidence of the Seismo-Ionospheric Precursors (SIPs) is reported by statistically investigating the relationship between the Total Electron Content (TEC) in GPS receivers and 170 M≥5.0 earthquakes during 1994-1999 in Taiwan. A median-based method and a z test are employed to detect the overall earthquake signatures. The SIPs, defined as the abnormal decrease more than lower qauntitle in the GPS-TEC during the afternoon period, significantly occurs within 1-5 days before the earthquakes. Finally, Molchan’s error diagram are used to measure the power of TEC for predicting M≥5.0 earthquakes in Taiwan.
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