台灣位於菲律賓海板塊的西部邊緣,處於地震多發的環太平洋火山帶附近。 相片:Facebook

台灣的地震預警系統將很快大幅提升其監測和警報能力。在地震儀檢測到地震後,新技術將能夠更快地發出警報,讓島上居民得以提前做好防範措施。亞洲時報(Asiatimes.com)報導

約有580公里的新海底電纜將於明年完成,該工程也將有助於該島更好地監測深海板塊運動。台灣位於菲律賓海板塊的西部邊緣,處於地震多發的環太平洋火山帶附近。

該島報警系統由中央氣象局運作,並且目前的響應時間為15至16秒。該局設有陸基站和海底電纜以偵測地震,現在地震檢測站的設施和相關軟體也逐漸得到更新和完善。

增強後的系統旨在更快速地發現地震並及時警告人們,以便讓人們在更安全的地方例如樓梯間或者桌子下面尋找庇護。

對於地震中心點在陸地上的地震,可以在檢測到震顫後15至16秒內發送警報。但是,如果地震中心點發生在海上,系統可能需要25到30秒才能發出警報。

然而,根據中央通訊社的報導,如果地震中心距離該地區太近,預警系統將仍然無法對這些「地震盲點」提供及時的警報。

當地震發生時,地震儀能夠記錄初級(P)波和剪切(S)波。 P波的傳播速度比S波快。前者造成的傷害非常小,而S波則會於波浪移動的方向垂直震動地面。

該局表示,如果地震發生在距離城市100公里的地方,P波將在地震發生15秒後到達該市,而S波將在25秒內到達。如果在城市中安裝了檢測地震波的設備,它會在檢測到P波時發出警報,讓居民在S波到達前10秒鐘做好準備。

一個人對地震作出反應的時間取決於他們與震中的距離,該局說,並補充說,如果在花蓮發生地震,預警系統可能對他們不起作用,但它可以幫助那些在宜蘭縣或台北的人們尋求庇護。

撰文:Asia Times Staff
原文:Taiwan to speed up earthquake alerts
更多:https://www.asiatimes.com/lang/chinese/
相片:Facebook

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