A study of microseisms induced by typhoon nanmadol using ocean-bottom seismometers

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Title:	A study of microseisms induced by typhoon nanmadol using ocean-bottom seismometers
Authors:	林靜怡;Lin, Jing-Yi;Lee, Tzu-Chuan;Hsieh, Hsin-Sung;Chen, Yen-Fu;Lin, Yi-Chin;Lee, Hsin-Hua;Wen, Yi-Ying
Contributors:	地球科學學院地球科學學系
Keywords:	amplitude;Asia;bathymetry;earthquakes;elastic waves;Far East;frequency;instruments;microearthquakes;monitoring;ocean bottom seismographs;ocean floors;Pacific Ocean;seismic energy;seismic networks;seismicity;seismograms;seismographs;Seismology;signals;Taiwan;technology;Typhoon Nanmadol;West Pacific
Date:	2014-10-01
Issue Date:	2026-04-23 11:27:22 (UTC+8)
Publisher:	Seismological Society of America
Abstract:	摘要： From the end of August to early September 2011, 15 ocean-bottom seismometers (OBSs) were deployed offshore northeastern Taiwan for approximately 20 days. During this period, the typhoon Nanmadol formed in the western Pacific, moved northwestward from the East Philippines, and made landfall on the island of Taiwan. In this study, we analyzed the seismic signals from the OBSs and the marine metrological data to investigate the influence of the typhoon on submarine seismic records. Our results show that the signals induced by the typhoon occurred mainly at approximately 0.15-0.5 Hz frequency. The magnitude of these signals depends substantially on water depth. Some exceptions, most likely generated by site effects, were observed. Also, a positive correlation exists between the signals energy and the local wave height, which suggests that the microseisms were affected by the pressure changes produced by the local wave activity as the typhoon passed over the stations. However, when an OBS was outside the typhoon periphery, any wave energy variations could only be caused by the elastic wave formed around the typhoon area, the energy of which is transmitted through the ocean bottom to the stations. Thus, no local waves were excited by the strong winds, and only a relatively small amount of energy was recorded. 出版者： Seismological Society of America 出版日期： 2014-10 出處： Bulletin of the Seismological Society of America, 2014-10, Vol.104 (5), p.2412-2421 資源來源： GeoScienceWorld 版權： GeoRef, Copyright 2020, American Geosciences Institute. Reference includes data from GeoScienceWorld Alexandria, VA USA United States. Abstract, Copyright, Seismological Society of America 識別號： ISSN: 0037-1106 識別號： DOI: 10.1785/0120130237
Appears in Collections:	[Department of Earth Sciences ] journal & Dissertation

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