속도구조와 지진발생 현황으로부터 밝혀진 판충돌대에서의 지각규모 약층 연구

Title
속도구조와 지진발생 현황으로부터 밝혀진 판충돌대에서의 지각규모 약층 연구
Alternative Title
Crustal-scale weak zone along a collisional suture revealed by spatial variations in velocity structures and seismicity
Author(s)
김광희; Kou-Cheng Chen; Jer-Ming Chiu; Hong-Yuan Yen; 강수영; 석봉출
Publication Year
2011-12-08
Abstract
High-quality first-arrival data collected with a high-density temporary seismic array andregional seismic network were used to construct a P-wave velocity model and identify the precise location of earthquakes in the active collision zone of southeastern Taiwan. A crustal-scale weak zone, defined by high seismicity, is characterized by a steeply east-dipping lower-velocity anomaly and represents a boundary between an uplifted upper-mantle and the Luzon volcanic arc. The main features of the weak zone, with its associated low-velocity zone and seismicity pattern, vary significantly along the collisional boundary of southeastern Taiwan. Along the weak zone, unlithified sediments or highly fractured materials are compacted as the Philippine Sea plate moves toward the Eurasian plate. In areas of more advanced collision, soft material is more compacted and can therefore store significantly greater amounts of strain energy. This energy is released through episodic earthquakes.
URI
https://sciwatch.kiost.ac.kr/handle/2020.kiost/27988
Bibliographic Citation
AGU Fall Meeting 2011, 2011
Publisher
AGU
Type
Conference
Language
English
Publisher
AGU
Files in This Item:
There are no files associated with this item.

qrcode

Items in ScienceWatch@KIOST are protected by copyright, with all rights reserved, unless otherwise indicated.

Browse