頁籤選單縮合
題 名 | 臺灣地區地震預警之初探=A Preliminary Study of the Earthquake Early Warning System in the Taiwan Area |
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作 者 | 辛在勤; | 書刊名 | 氣象學報 |
卷 期 | 42:2 1998.06[民87.06] |
頁 次 | 頁118-134 |
分類號 | 351.249232 |
關鍵詞 | 地震預警; Early warning system; |
語 文 | 中文(Chinese) |
中文摘要 | 本文利用 22 組中央氣象局在過去 6 年所收錄的強震資料,探討地震預警的可行 性, 在簡化某些繁雜的計算及模擬後,可歸納出適用於臺灣地區的 PGA 衰減公式及各測站 的場址效應因子, 配合所得 PGA 在震源處與 ML 之關係,各地震度可在地震位置及規模被 計算出的同時獲得,而估的結果已能有效的描述地振動加速度在 8gal 以上之區域。雖有小 局部地方的加速度仍舊超出估算值,其是否受波徑的影響尚待探討,但此地震預警模式已具 相當程度之應用性。 |
英文摘要 | Using the 22 sets of strong motion data collected by the Central Weather Bureau, the feasibility of an earthquake early warning system for the Taiwan area is studied. The attenuation curve of peak ground accerleration (PGA), site effects of strong motion site, and the relationships between PGA and the magnitudes of earthquakes are constructed for the prediction of PGA. The results can be easily applied right after the determination of earthquake epicenter and magnitude. Comparing the observed and calculated isoseismal map of the 22 earthquakes used by this study, it shows that the area of ground motion exceeding 8gal(cm/sec �� ) can be effectively depicted. Some of strong motion sites occasionally show very local site effects which are underestimated by using this method. This may be caused by the effects of radiation pattern or path effects. Nevertheless, the results are stable enough to be tested in the operational mode. |
本系統中英文摘要資訊取自各篇刊載內容。