科技部地球科學學門地球物理學之研究發展，為推動地震及地球物理科學與 對國家社會永續發展之整合研究，期能對國家社會、經濟、學術發展有所貢獻。
2019 年我們持續推動「台灣地震科學研究中心 (Taiwan Earthquake Center)」之相 關計畫，深入探討台灣地震之孕震、發震、及地震循環過程。持續規劃 2020 年 3 月臺紐造山運動研討會及拓展菲律賓及東南亞各國相關計畫。加強推動與美國、
日本及紐西蘭國際合作。我們目標在於進一步瞭解地震循環過程及對地震的防減 災有所貢獻。
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科技部補助專題研究計畫出席國際學術會議心得報告
計畫編號 MOST 108-2114-M-006-001
計畫名稱 地球科學學門(地物組)研究發展及推動計畫 出國人員姓名
服務機關及職稱 饒瑞鈞 國立成功大學地球科學系 教授 會議時間及地點 2019 年 07 月 29 日- 08 月 02 日 新加坡
會議名稱 16th Asia Oceania Geosciences Society (AOGS) Annual Meeting
發表論文題目 Continuous GPS observations along the West Valley Fault in Metro Manila, Philippines 告的題目為 Continuous GPS observations along the West Valley Fault in Metro Manila, Philippines。
7/27 台南-桃園。
1. 聆聽 Kevin Furlong 的 co-seismic deformation may partition long-term strain accumulation.
Megathrust rupture often deviate from simple plate motion rebound.
2. 聆聽澳洲學生報告 Dynamics of arc-continent collision, explaining arc thickness controls collision dynamics
3. James Moore explains the importance of ductile deformation 4. 下午與三位學生會談
8/01 開會，發表論文『Continuous GPS observations along the West Valley Fault in Metro Manila,
Philippines』。 8/02 開會。
聆聽一系列之 Fibre-optic distribute sensing 研究，受益良多。
8/03 新加坡-桃園-台南。
二、與會心得
今年 AOGS (Asia Oceania Geosciences Society) 年會有三位台灣學者參與競選 AOGS president 及 IG and Ocean Science 分項學門之主席，我參與此會也是對他們表示支持。 結果 AOGS president 及 IG 分項學門主席由台灣學者勝出。本人於會中與多位學者討論與台灣地震科學中心之合作計畫。與 Earth Observatory of Singapore 之 Chung-Han Chan 探討東南亞及台灣地震災害問題。此次會議聆聽 了一系列之 Fibre-optic distribute sensing 專題演講，受益良多。本人於會中與日本地球科學聯盟 Kiyoshi Suyehiro 討論合作事宜(圖一)。
三、建議
亞洲地球科學大會(Asia Oceania Geosciences Society)為亞洲地球科學重要的一個會議；它是提供亞 洲地球科學家在一週之內集中且廣泛的吸收新知、交換意見的場合。此會議不僅對研究學者，更是 對學生一個很重要的學習機會。後續我們將考慮補助研究生參與此會。
圖一 與日本地球科學聯盟 Kiyoshi Suyehiro 及 TEC 梁文宗合照
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摘要
Continuous GPS observations along the West Valley Fault in Metro Manila, Philippines
Ruey-Juin Rau, Choon-Muar Ker, Kuo-En Ching National Cheng Kung University, Tainan, Taiwan
Genesis Sapla, Teresito C. Bacolcol, and Renato U. Solidum, Jr.
Philippine Institute of Volcanology and Seismology
CP Garcia Avenue, UP Campus, Diliman, Quezon City, PHILIPPINES email: [email protected]; fax: +886-6-2740285
Abstract
The West Valley Fault (WVF) is a 100-km-long NNE-trending linear fault transecting most of the eastern Metro Manila. Based on the displaced alluvial fans, offset streams, and structural geology analyses, the WVF revealed a right-lateral slip motion during late Pleistocene to Holocene, and post-dated the normal fault displacement that created the Marikina Valley to the east. Historical earthquake catalogue for the past 350 years indicates that there are three events probably related to the activations of WVF, as the 1863 M 6.5 event being the largest and the latest. Paleoseismology study indicates that there had been 3-4 surface rupture events occurred during the last 1400 years with the most probably earthquake magnitudes are Mw 6-7.
Considering its close proximity to the Metro Manila with a population of 12 million, the mode of deformation of WVF requires a closer evaluation for a better earthquake hazard assessment of the Metro Manila. We have established a 20-stations single-frequency GPS network with a combination of 6 dual-frequency GPS stations from IGS and PHIVOLCS in the 30-km-length crossing eastern Metro Manila part of the WVF area since July 2016. The continuous, two-year (2016-2018) single- and dual-frequency GPS data were processed with Bernese 5.0, where the station PIMO is used as the reference station. Our results indicate that central and northern parts of the stations consistently show a 25 mm/yr, WNW-trending horizontal velocity, while the southern stations directing westward. There is a negligible velocity difference across the WVF. All the WVF station velocities are in general coherent with the other station velocities south of the Digdig fault in central Luzon, in that the central Luzon behaves as a rigid block. Taking into account the geological, seismological and GPS observations, the earthquake potential of the WVF will be evaluated.
108年度專題研究計畫成果彙整表
Rau, R.-J.*, and Tseng, T.-L., Introduction to the special issue on the 2018 Hualien, Taiwan, earthquake”, TAO, 30, 281-283, doi:10.3319/TAO.2019.05.31.01,