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台灣及鄰近地區地體動力學研究VII-GOTTA VII：利用高密度地震陣列探討北臺灣桃園–新竹地區的地震活動與S 波速度構造;Using a Dense Seismic Array to Investigate Seismic Activity and Shear-Wave Structure in the Taoyuan–Hsinchu Area, Northern Taiwan

Mon, 27 Jul 2026 07:27:31 GMT

title: 台灣及鄰近地區地體動力學研究VII-GOTTA VII：利用高密度地震陣列探討北臺灣桃園–新竹地區的地震活動與S 波速度構造;Using a Dense Seismic Array to Investigate Seismic Activity and Shear-Wave Structure in the Taoyuan–Hsinchu Area, Northern Taiwan abstract: 基於機器學習的震相判讀運用在本研究所設計之觀測陣列，在六個月的佈署期間，我們將能晚整描繪桃新苗地區地震活動的時空分布特徵。環境雜訊層析成像可獲得淺部高解析度的三維剪力波速度結構，初步估計其可解析深度約為 7.5 公里。結合活動斷層位置與地震活動時空分布結果，將可桃新苗地區的地體構造環境，有進一步了解。在地球物理探勘方面，地熱資源通常伴隨流體誘發地震活動及低速度異常，本計畫的研究成果也能加以辨識這些特徵。

Present-day surface deformation and tectonic insights of the extensional Ilan Plain, NE Taiwan

Thu, 23 Apr 2026 10:20:49 GMT

title: Present-day surface deformation and tectonic insights of the extensional Ilan Plain, NE Taiwan abstract: 摘要： •PSI results from ENVISAT radar images have been carried out.•Rapid subsidence occurs in the southern part of the Ilan Plain.•Sansing and Choshui faults are the most active structures in the Ilan Plain.•Opening of the Ilan Plain is controlled by the propagation of Okinawa Trough. Taiwan’s mountain belt is an ideal location to address major questions regarding mechanisms of lithospheric deformation in convergent settings, mountain building processes from oceanic subduction to continental subduction, and post orogenic extension. In the northeast of this belt, the Ilan Plain is a triangular, deltaic plain characterized by a flat topography close to the sea level, and surrounded by the high mountains of the Hsuehshan Range to the northwest, and the Central Range to the southeast. Its eastern coast faces the western tip of the Okinawa Trough, the back-arc basin of the Ryukyu subduction zone. In this study, we analyzed the present-day surface deformation of the Ilan Plain, aiming at deciphering its relationships with basement faults and the regional geodynamic setting. Our approach is mainly based on surface vertical displacements revealed by Persistent Scatterer Interferometry Synthetic Aperture Radar (PSI), which indicate that there is an area of active subsidence (∼18mm/yr) located in the southern part of the plain in probable connection with active basement faults and in agreement with previous geodetic measurements and existing geophysical data. Our PSI results also suggest that the subsidence occurring in the Ilan Plain has moved from north to south during Quaternary in relation with extrusion of the belt due to the westward propagation of the Okinawa Trough through the Taiwan Mountains. 出版者： Elsevier Ltd 出版日期： 2015-06-01 出處： Journal of Asian earth sciences, 2015-06, Vol.105, p.408-417 資源來源： Access articles in the ScienceDirect collection 版權： 2015 Elsevier Ltd 識別號： ISSN: 1367-9120 識別號： EISSN: 1878-5786 識別號： DOI: 10.1016/j.jseaes.2015.02.013

Pleistocene alluvial deposits dating along frontal thrust of Changhua Fault in western Taiwan: The cosmic ray exposure point of view

Thu, 23 Apr 2026 10:20:48 GMT

title: Pleistocene alluvial deposits dating along frontal thrust of Changhua Fault in western Taiwan: The cosmic ray exposure point of view abstract: 摘要： To tackle the history of active thrusts, it is necessary to open the observation window on time scales on the order of 104–105 years by studying the surface morphologies resulting from their activities. Because fluvial systems are particularly sensitive to recent environmental changes, geomorphic features such as alluvial terraces are frequently used as markers to gauge tectonic deformation. Together with the measurement of cumulative displacements, the chronological framework of emplacement and abandonment of these geomorphic markers is thus fundamental to determine long-term fault slip-rates. In Taiwan, the geomorphic features associated with fault activity have been studied in detail with a high level of resolution; however, the use of deformed and partially preserved alluvial terraces is often hampered by the absence of well-documented ages. The purpose of this paper is two-fold. First, we take the opportunity to review the chronological constraints that have been published in Taiwan so far. Second, we present how the cosmogenic dating method (in situ-produced 10Be) can be used to constraint the chronological framework of alluvial deposits over a Pleistocene time scale. Thanks to a comparison of our cosmogenic-derived ages with existing data, we present a consistent regional chronological framework for the Pakua–Tadu area along the Changhua Fault, one of the most active frontal thrusts in the Western Foothills of the Taiwan mountain belt. We also discuss its relationships with global eustatism and its tectonic implications for the timing of propagation of the deformation front during the last 450kyr. 出版者： Elsevier Ltd 出版日期： 2012-06-02 出處： Journal of Asian earth sciences, 2012-06, Vol.51, p.1-20 資源來源： Elsevier ScienceDirect Journals Complete - Autoholdings 版權： 2012 Elsevier Ltd 版權： CC0 1.0 - Universal 識別號： ISSN: 1367-9120 識別號： EISSN: 1878-5786 識別號： DOI: 10.1016/j.jseaes.2012.02.002

利用衛星測地資料分析花東縱谷北段之地殼變形

Thu, 23 Apr 2026 03:50:56 GMT

title: 利用衛星測地資料分析花東縱谷北段之地殼變形 abstract: 摘要：臺灣東部為歐亞板塊與菲律賓海板塊交界處，地震發生頻繁，但近20年來花東縱谷北段僅有少數規模大於五的地震，因此此段的縱谷斷層被視為震間鎖定狀態，和南段的淺部潛移深部發震行為不同。透過觀測縱谷北段的地表變形有助於瞭解兩板塊間現今的碰撞及運動方式，並可提供地震潛勢分析的依據。本研究結合全球衛星定位系統(GPS)及永久散射體差分干涉(PSInSAR)兩種衛星測地資料，分析2004年至2010年間縱谷北段的三維地表變形。結果顯示此區的水平速度大致以20-25 mm/yr朝向西北，並呈現由南往北順時針變小的情形。垂直運動上，海岸山脈在23.4°N以北呈現最大10 mm/yr的下沈，推測此運動可能和菲律賓海板塊在此處外海向北隱沒至歐亞板塊或是東部外海一西傾斷層的震間滑移有關。此外，應變率分析與地震觀測指出：(1)中央山脈東側發生的正斷層地震應與此處接近東西向伸張的地表變形有關；(2)縱谷北段有快速的應變能累積，加上近20年僅發生過兩個地震矩規模大於五的的地震，顯示此區可能有較高的地震潛勢。出版者：中華民國地籍測量學會出版日期： 2016-07-01 出處：國土測繪與空間資訊, 2016-07, Vol.4 (2), p.117-138 資源來源： Airiti Library