本論文利用全球電離層圖(Global Ionospheric Map, GIM)的全 電離層電子含量(Total Electron Content, TEC)研究 1999-2014 年 環太平洋地震帶上的地震電離層前兆(seismo-ionospheric precursors, SIPs)。分析環太平洋地震帶上 5 個區域為台灣、蘇門答臘、 南美洲、日本和中美洲。以 15 天為背景計算規一化 TEC 與 Z 檢定判 斷可能的前兆出現時間。利用接收者作業特徵曲線評估前兆的預測 性。檢視台灣地區 129 筆規模 M≧5.5 的地震後發現，前兆時間發生 在地震前 2-4 天 1600-2000LT 種類為負異常。而蘇門答臘 153 筆規 模 M≧6 的地震，前兆則出現在地震 1-2 天前的 0200-0600LT。南美 洲 3-5 天前 1800-2300LT 負異常預測 151 筆地震有較好的效果。日 本地區 220 筆地震分析的結果顯示地震電離層前兆出現在地震 1-4 天前的正異常。而中美洲地區 1991-2014 年 122 筆規模大於 6 個地 震前兆出現在 10-15 天前，種類是負異常。規模越大的地震強照現 象越強烈，顯示可能有能量漏釋的現象。;Evidence of the seismo-ionospheric precursor (SIP) is reported by statistically investigating the relationship between the total electron content (TEC) in global ionosphere map (GIM) and earthquake of Circum-Pacific seismic zone during 1999-2014. This paper was studied the earthquakes occurred in Taiwan, Sumatra, South America, Japan, and Central America. A median-based method together with the z test is employed to examine the TEC variations 30 days before and after the earthquake. The receiver operating characteristic (ROC) curve is then used to evaluate the efficiency of TEC for predicting earthquakes during a specified time period. It is found that the TEC significantly decreases 1600-2000 LT in 2-4 days before the 129 M≥5.5 earthquake in Taiwan. The statistical result in Sumatra shows that TEC reductions appeared 0200-0600 LT 1-2 days before 153 M 6.0 earthquakes. 151 M 6.0 earthquakes in South America was studied and TEC significantly decreases 1800-2300 LT 3-5 days before earthquakes. An abnormal increase was found 1-4 days before 220 M 6.0 earthquakes in Japan. The TEC in Central America decrease 10-15 days before 122 M6.0 earthquakes
