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    Please use this identifier to cite or link to this item: http://ir.lib.ncu.edu.tw/handle/987654321/56765

    Title: 重力、磁力變化與地震活動關聯性之研究(III);Study of the Variations of Gravity and Geomagnetic Associated with the Seismicity (III)
    Authors: 顏宏元
    Contributors: 中央大學物理研究所
    Keywords: 地球科學類;地磁場;重力;地震;geomagnetic;gravity;earthquake
    Date: 2006-09-01
    Issue Date: 2012-10-01 15:01:39 (UTC+8)
    Publisher: 交通部中央氣象局
    Abstract: 許多大地震發生之前,都可以偵測到地磁與重力的改變。當岩層受到應力作用,因岩石脹容(Rock dilatancy)現象會造成地表變形;另外應力作用也可能使岩層有質量轉移(Mass transfer)的現象,這些現象都會造成地表重力值的改變。六年前的921大地震後,我們檢視全省磁力連續觀測資料發現,位於車籠埔斷層兩端的磁力站—鯉魚潭站及灣丘站,都觀測到磁力異常訊號,這些異常訊號與地震的發生有時間上的巧合。本計畫將分兩部份進行,重力方面選擇橫跨斷層的重力基點進行重複觀測,根據文獻報告,在規模較大的地震發生前,震央附近重力基點的重力值有變化的情形,因此,重力重複觀測可作為地震前兆現象研究項目之一。本計畫選擇橫跨觸口斷層的重力基點進行重複觀測,以監測該斷層活動所衍生的重力變化。以監測該斷層活動所衍生的重力變化;磁力方面將藉由全省地磁連續觀測網,分析磁力變化與地震發生的關聯性。 ; Local changes in gravity field can be expected from changes in elevation for the rock dilatancy and the redistribution of mass of earth?HHH?HHHs crust due to the tectonic stresses. Many examples of gravity changes accompanying both seismic and aseismic deformations have been reported. The repeated microgravity survey along profile across known active fault is one of the items included in the earthquake precursor research program. Repeated microgravity survey will be made to detect the gravity variation across the Chukou fault. In the year, remarkable gravity changes in the hanging-wall side at the Chukou fault were maybe associated with the earthquake occurred in Chiayi area. ; 研究期間 9501 ~ 9512
    Relation: 財團法人國家實驗研究院科技政策研究與資訊中心
    Appears in Collections:[物理研究所] 研究計畫

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