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JDR Vol.16 No.8 pp. 1257-1264
(2021)
doi: 10.20965/jdr.2021.p1257

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Benefits of Defining Geological Sensitive Zones in the Mitigation of Disasters Along Earthquake Fault Zones in Taiwan – The Case of Milun Fault

Tyan-Ming Chu*1, Wen-Jeng Huang*2, Tsung-Yi Lin*3, Shih-Ting Lu*4, Yen-Chiu Liu*4, Cheng-Shing Chiang*5,†, and Yi-Huei Chang*6

*1Pro-Vision Environmental Engineering Corporation
9F-4, No.65, Songde Road, Xin-Yi District, Taipei, Taiwan

*2Graduate Institute of Applied Geology, National Central University, Taoyuan, Taiwan

*3Department of Geography, National Taiwan Normal University, Taipei, Taiwan

*4Central Geological Survey, Ministry of Economic Affairs (MOEA), New Taipei, Taiwan

*5921 Earthquake Museum of Taiwan, National Museum of Natural Science, Taichung, Taiwan

†Corresponding author

*6Systems and Technology Corporation, New Taipei, Taiwan

Received:
May 18, 2021
Accepted:
September 29, 2021
Published:
December 1, 2021
Creative Commons License
Keywords:
earthquake fault zone, surface rupture, Milun Fault, Taiwan
Abstract

In Taiwan, the main purpose of earthquake fault zone legislation is to prevent earthquake-related disasters around the surface traces of active faults, particularly in urban areas. Here, the Geologically Sensitive Area (GSA) of the Milun Fault (Milun Earthquake Fault Zone) is used as an example to reveal the importance of such legislation. Field data collected along the Milun Fault before and after the 2018 Hualien Earthquake were used to reveal the reappearance of damages within the GSA. The 2018 Hualien Earthquake represents one of the shortest recurrence intervals (67 years) among all major faults in Taiwan. Most of the surface ruptures and damaged buildings in Hualien City were within the Milun Fault GSA and concentrated on the hanging wall of the fault. Moreover, 61% (91/148) of the damaged buildings and 83% (692/835) of the surface ruptures occurred within 100 m of the fault line. The results of this study demonstrate the importance of defining GSAs of active faults for mitigating earthquake hazards.

Cite this article as:
T. Chu, W. Huang, T. Lin, S. Lu, Y. Liu, C. Chiang, and Y. Chang, “Benefits of Defining Geological Sensitive Zones in the Mitigation of Disasters Along Earthquake Fault Zones in Taiwan – The Case of Milun Fault,” J. Disaster Res., Vol.16 No.8, pp. 1257-1264, 2021.
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Last updated on Apr. 22, 2024