在台灣中部地區底下，發現有深度40～80公里的深部地震之存在，依其分佈形態大略可分為東、西兩側地震群；本研究使用中央氣象局所提供1991年至2004年之三分量短週期數位地震資料，研究範圍在中央山脈中段，且深度30公里以下，而藉由三維地震重新定位、震源機制解以及應力反演等方法來加以討探其發震構造。

　　研究結果顯示，東側地震群主要是受到板塊的推擠，而有向北、向西下傾的現象，σ1方向以N100oE為主，由於菲律賓海板塊斜向碰撞的關係，造成與區域最大應力方向垂直的側向伸張，形成東北-西南向之伸張方向；西側地震群則呈一寬約20公里的狹長地震帶，向東下傾至中央山脈底下深度75公里處，由於菲律賓海板塊持續不斷的向西北方進行推擠，進而產生呈現西北-東南向壓縮之逆斷層，而在碰撞造山的過程中，中央山脈底下會產生局部的斷塊，破裂的岩體受浮力所影響向上抬升，而產生西北-東南向伸張的正斷層。

中文部分

交通部中央氣象局地震季報，第五十卷，第四號，第1~9頁，2004。
經濟部中央地質調查所，臺灣地質圖，2000。

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