台灣人口密度高且地質活動頻繁，兩項因素為評估適宜台灣的地震災害模型重要參數，在災害性地震事件中降低風險是台灣人民保護自身財產安全最重要的課題。本研究藉由限制非餘震序列下地震事件的規模、位置，篩選出地震對，其特性為具有相似規模且相近距離的獨立地震事件群，憑此特性剖析台灣發震區域特徵，並利用此要素建造符合災害風險的建築及制定適宜法規。本研究使用中央氣象局地震觀測網( Central Weather Bureau Seismic Network, CWBSN ) 1994 年1 月1 日至2017 年8 月的全台地震目錄且利用時間與空間特性剔除餘震後篩選出地震對，條件為目錄內獨立地震事件且符合（1）芮氏規模相差0.15 內、（2）震源間距相差 2√2 公里、（3）發震時間間隔 365 天以上，一次地震事件往往會配對到多個地震對而組成相似地震群，並結合前人速度構造與東部重複地震目錄分析相似地震群其發震區域分布及特性。
資料分析結果顯示相似地震群內含有15 個以上地震對時，可從地震目錄中挑選出50354 筆符合地震對條件的地震事件，判釋出其特性如下：主要規模集中於芮氏規模2.8 以內其中以最小完整規模至芮氏規模2.4 為最多事件的區間；深度集中於30 公里以內並在10 公里與20 公里出現事件數的峰值，另外時間間隔主要分布於1 年至10 年區間。依據上述結果發現限制地震事件規模及震源間距並篩選出符合條件且相似地震群內含15 個以上地震對時，相似地震群分布的位置主要可分成花東地區、中央山脈南段與潮州斷層區域及觸口斷層區域，且在這些區域均有著穩定大地構造提供錯動能量，致使於地震目錄中發現接連發生的相似規模、距離的地震事件。
綜合上述研究結果繪製剖面且結合前人速度構造模型及重複地震地震目錄分析，相似地震群對多落在Vp/Vs 比值約為1.73 的等值線附近或是較低Vp/Vs 區域，表示地震群多受地下構造破裂密度及流體等因素影響產生的地震事件，另外加入東部重複地震目錄與相似地震群比較，相比於重複地震對於地震事件波形、規模、震源機制解等等參數去挑選，發現相似地震群因為僅限制規模、距離及時間間隔下，依然可在東部常見的孕震區域中發現，代表相似地震群可以用較簡單的限制去尋找可能的孕震區域，並於未來工作中可作為一項參數輔助台灣地震災害模型保障人民財產安全。

Taiwan is located at the junction of the Eurasian plate and the Philippine Sea plate. How the people of Taiwan protect their lives and property under highfrequency seismicity has become the most important issue. This study used the earthquake catalog of the Central Weather Bureau Seismic Network (CWBSN) from January 1994 to August 2017. We selected which are larger than the magnitude of completeness in the catalog and eliminated which are possible to be aftershocks and a series of aftershocks caused by the Chi-Chi earthquake on September 21, 1999 according to the earthquake occurrence time and distance, and then the collated catalog was used for selecting earthquake pairs, which the magnitude difference is within 0.15, the hypocenter interval is within 2√2 kilometers, and non-aftershocks of each other. And the different seismogenic regions are analyzed through the distribution in Taiwan. This study found that when the similar earthquake clusters contained more than 15 earthquake pairs contained, there were 54,626 earthquake events that met the conditions in Taiwan. And the characteristics of these earthquake events and their rules, depth, and time interval were furtherly analyzed. Therefore, it is found that most of the similar earthquake clusters are located in Hualian-Taitung area, the southern section of the Central Mountains-the Chaozhou fault area and the Chukou fault area. These areas are all located on a stable geotectonic stress environment, and thus the earthquake events of similar magnitude and distance are generated.

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中文部分

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