大地震發生之後是否成災，為眾人所注意之焦點，然而地震災害之發生與強地動分布有密切關係。因此，瞭解大地震發生之後強地動大小之分布為地震減災的一項重要之工具。計算強地動分布首先需瞭解各區域下之場址效應，在過去強地動觀測網測站之場址效應已經廣泛被討論及分析。但部分測站以過去所收錄之地震記錄進行分析比較後，會發現部分測站會有異常放大之現象。故本研究希望藉由93年度所得到各測站之場址效應修正係數做為基準，找出場址效應有異常反應之測站，並分析造成此異常場址效應之原因，提供業務單位參考。進而使該測站能在大地震發生後，能更精確地推估該地區之強地動分布，以獲得較好之災害估算。 After a disaster earthquake, most people focus on the building structures that will severe damage or not. However, the seismic damage is very closely correlated with the ground motion. Therefore, understand the strong ground motion's shakemap of a disaster earthquake could be useful for seismic disaster reduction. For calculation the strong ground motion distribution, the site effect at each area need to be understand first. The effect of site condition to the ground motion always was considered and analyzed. But the record data at some sites were found to have unusual amplification phenomenon. The purpose of this project is to investigate these unusual stations we found in the project of 2004 and try to find out why causes its unusual local site effects at that site. The result will improve the model for estimating the strong ground shaking, and precisely estimate the shakemap for disaster earthquake. Finally, it will give us better damage estimation results. 研究期間：9401 ~ 9412
