由於有研究提出，地震前似乎會以某種機制使得電離層發生擾動，並以此電離層擾動現象為地震前兆。因此，本論文的主軸，就是希望藉由地震事件的深入分析，探討電離層擾動現象是否可能為地震前兆。研究中我依循過去已發表的電離層地震前兆事件，利用相同的定義標準和分析方法，進行電離層全電子含量(total electron content, TEC)的統計分析，即以四分位統計法來確認電離層擾動現象，並為這個統計方法設定篩選條件，只要一天內超過1/3的觀測值超過定義的平均上下限時，即認定該天為電離層擾動現象天數。
在汶川地震事件的研究中，我分別以時間與空間做為變數，而其他條件相同的情形下進行電離層地震前兆的統計。首先，在排除明顯太空天氣干擾的前提下，從不同時間區段進行相同的統計分析，得到了超過90%以上的電離層擾動現象是沒有地震發生的；其次，透過不同空間地點的交叉分析之下，結果發現相同電離層擾動是沿著地磁緯度發生的全球性現象，並非地震可能導致的區域性現象。因此，過去提出的地震前兆相當有可能是電離層本身區域性的隨機擾動，或整體性的變化所呈現必然的統計結果。所以，以此現象與地震做關聯性是具有相當爭議性的方式。

The main purpose of this paper is to explore whether the ionospheric disturbance phenomenon may be an earthquake precursor through the in-depth analysis of the Wenchuan earthquake. The analysis method follows the quartile statistical method proposed by previous research studies, and takes time and space as variables to carry out the statistics of ionospheric earthquake precursors. First, on the premise of excluding the obvious space weather interference, the ionospheric disturbance phenomenon is located in the Wenchuan area based on the same statistical analysis from different time intervals, more than 90% of the ionospheric disturbances are not accompanied by earthquakes. Secondly, through the cross analysis of different spatial locations, it is found that the ionospheric disturbances 1-6 days before the Wenchuan earthquake are global phenomena along the geomagnetic latitude, not regional phenomena that may be caused by earthquakes The earthquake precursor proposed by the research studies may be the inevitable statistical result of the regional random disturbance or the global change of the ionosphere itself.

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