Receiver Operating Characteristic curves of the seismo-ionospheric precursors in GIM TEC associated with magnitude greater than 6.0 earthquakes in China during 1998-2013.

Chi-Hsuan Huang1, Yuh-Ing Chen2, Jann-Yenq G Liu3 and Yen hao Huang3, (1)Institute of Space Science National Central University, Jhongli, Taiwan, (2)Graduate Institute of Statistics, National Central University, Taoyuan, Taiwan, (3)NCU National Central University of Taiwan, Jhongli, Taiwan
Abstract:
Statistical evidence of the Seismo-Ionospheric Precursors (SIPs) is reported by statistically investigating the relationship between the Total Electron Content (TEC) in Global Ionosphere Map (GIM) and 56 M≥6.0 earthquakes during 1998-2013 in China. A median-based method and a z test are employed to detect the overall earthquake signatures. It is found that a reduction of positive signatures and an enhancement of negative signatures appear simultaneously on 3-5 days prior to the earthquakes in China. Finally, receiver operating characteristic (ROC) curves are used to measure the power of TEC for predicting M≥6.0 earthquakes in China.
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