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姓名 ?世名(Shih-Ming Wen)  查詢紙本館藏   畢業系所 地球科學學系
論文名稱 以雙差分定位法重新定位2017 Batangas地震序列
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摘要(中) 菲律賓群島由菲律賓海板塊與巽他板塊(Sunda Plate)聚合所形成,巽他板塊向東隱沒形成馬尼拉海溝,明多洛島位於馬尼拉海溝南端隱沒終止處,為巴拉望陸塊與菲律賓移動帶的碰撞邊界。本研究於2013年起在明多洛島西北架設4部寬頻地震站監測周遭地震事件,為增加測站包覆性,我們結合菲律賓火山地震局(PHIVOLCS)的測站資料,分析2017年4月八打雁省(Batangas)與明多洛島之間的地震序列,以了解此地震序列的空間分布與應力狀態。
我們使用監測網記錄到此地震序列的P波與S波走時資料,搭配人工調整地震波到時反演震源參數,並使用HypoDD重新定位,消除速度構造對定位結果的影響。定位的結果顯示Batangas地震序列可分為4/4 12:58事件為首的前震序列,及以4/8 07:07與07:09事件為首的雙主震序列。在空間的分佈上,前震序列活動範圍較窄,接近南北走向,主震序列的分佈較廣,呈現西北-東南向的分佈。此分佈與GCMT目錄中4月8日Mw 5.9的西北東南走向的右移破裂面一致。在GCMT目錄中搜尋走向滑移地震多為在SVPF上的左移破裂,右移破裂自1976年以來只有1994年民多洛地震與此地震序列,我們推測Sibuyan Verde Passage Fault (SVPF)進入明多洛島北部為應力轉換區域。
Batangas地震序列的震源機制主要由東西向的張應力控制,且依壓應力軸傾角可分為兩組形式,前震序列的分佈與南北向的東傾正斷層面較一致,主震序列與西北-東南走向右移斷層面較一致。另外,此地震序列南邊緊鄰左移破裂的SVPF,北邊則是火山地熱活躍的Macolod Corridor(MC)。故本研究探討此地震序列的應力狀態亦可幫助我們了解MC的東西拉張環境。

關鍵字:明多洛、八打雁、地震序列。
摘要(英) The Philippine archipelago are formed by the aggregation of the Philippine Sea Plate and the Sunda Plate. The Sunda plate subducted eastward to form the Manila Trench. Mindoro is located at the southern end of the Manila Trench, which is collision of south-moving Philippine mobile belt (PCB) and NW-moving Palawan continental block (PMB).To tackle the issue of 2017 Batangas earthquake sequence, we deployed a broadband seismic array of four stations since 2013. To increase station coverage, we recorded by the array provides an opportunity to better understand the tectonics by analyzing its distribution and stress state.
We use the monitoring network to record the P-wave and S-wave travel time data of this earthquake sequence. The artificially adjusted seismic wave is used to invert the source parameters and relocation using HypoDD to eliminate the influence of the velocity structure on the positioning results. The results of the positioning show that the Batangas earthquake sequence can be divided into 4/4 12:58 event-based foreshock sequence and double main shock sequence headed by 4/8 07:07 and 07:09 events. In the spatial distribution, the range of motion of the foreshock sequence is narrow, trend to the north-south trend. The main shock sequence is widely distributed, showing a northwest-southeast distribution. The search for the trending slip earthquake in the GCMT catalogue is mostly the left shift rupture on the Sibuyan Verde Passage Fault (SVPF), and the right shift rupture only the 1994 Mindoro earthquake and this earthquake sequence. We speculate that SVPF enters the northern part of Mindoro as a stress-converting region.
Keywords: Mindoro、Batangas、Earthquake sequence
關鍵字(中) ★ 明多洛
★ 八打雁
★ 地震序列
關鍵字(英) ★ Mindoro
★ Batangas
★ Earthquake sequence
論文目次 中文摘要……………………………………………………………………i
英文摘要……………………………………………………………………ii
致謝…………………………………………………………………………iii
目錄…………………………………………………………………………iv
圖目錄………………………………………………………………………v
表目錄………………………………………………………………………vii
第一章、緒論………………………………………………………………1
1.1 研究動機……………………………………………………………1
1.2 本文架構……………………………………………………………2
第二章、地質背景…………………………………………………………4
2.1 區域地體構造………………………………………………………4
2.2 地震特性……………………………………………………………5
第三章、資料與資料處理…………………………………………………14
3.1 儀器與測站介紹……………………………………………………14
3.2 地震定位……………………………………………………………14
3.3 利用雙差分定位法重新定位………………………………………15
3.3.1 雙差分地震定位法……………………………………………15
3.3.2 利用雙差分定位法之參數設定………………………………17
第四章、結果………………………………………………………………32
4.1 殘差分佈與定位誤差分析…………………………………………32
4.2 Batangas地震序列分佈 .…………………………………………32
第五章、討論………………………………………………………………41
5.1 與PHIVOLCS地震目錄比較 ………………………………………41
5.2 能量釋放……………………………………………………………41
5.3 前震與主震序列之分佈與震源機制………………………………42
5.4 地震序列與地震構造關聯性………………………………………43
第六章、結論………………………………………………………………54
參考文獻……………………………………………………………………55
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Yumul, Graciano P., Carla B. Dimalanta, Edanjarlo J. Marquez, and Karlo L. Queano. (2009). ′Onland signatures of the Palawan microcontinental block and Philippine mobile belt collision and crustal growth process: A review′, Journal of Asian Earth Sciences, 34: 610- 23.
王晨維,利用短週期臨時地震觀測網分析菲律賓明多洛島地震分佈,國立中央大學地球科學學系碩士論文,共65 頁,2013 年。
指導教授 陳伯飛(Po-Fei Chen) 審核日期 2018-8-23
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