Links between microseisms and extreme waves during typhoons

Li Ching Lin, Jiing-Yih Liou, Hwung Hweng Hwung, Frédéric Bouchette, Samuel Meulé

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Ocean-Solid Earth coupling is the main forcing of generating seismic noise. It has been well known that seismic noise in the frequency band from 0.05 to about 1 Hz results from ocean waves. Components of noise spectrum, also called microseisms, are used to study extreme waves during typhoons. During the KUN-SHEN project (2011-2014), wave measurements have collected at the Cigu coast of Taiwan and compared with microseisms observations at inland seismometers from Broadband Array in Taiwan for Seismology (BATS) network. By comparing between background and storm induced microseisms, peaks in the noise spectrum can be divided in to two frequency bands. Comparison of microseism band between 0.1 and 0.2 Hz with buoys in the deep sea shows a strong correlation of seismic amplitude with storm generating waves, implying mat this energy portion could originates at the remote regions. Microseism amplitudes above 0.2 Hz show a good correlation with wind-generating waves near coasts. Findings also show mat maximum amplitudes of two different portions have the significant time lag, implying that source locations of generating microseisms can be identified. Results indicate that secondary microseisms observed at inland sites can be a potential tool of tracking typhoon motions and monitoring extreme waves near coasts in real time. Seismic noise in the l-10Hz band has rough correlation with wave activities in swash zone. Further examination is required to investigate those differences.

Original languageEnglish
Title of host publicationProceedings of the 34th International Conference on Coastal Engineering, ICCE 2014
EditorsPatrick Lynett
PublisherAmerican Society of Civil Engineers (ASCE)
ISBN (Electronic)9780989661126
Publication statusPublished - 2014 Jan 1
Event34th International Conference on Coastal Engineering, ICCE 2014 - Seoul, Korea, Republic of
Duration: 2014 Jun 152014 Jun 20

Publication series

NameProceedings of the Coastal Engineering Conference
Volume2014-January
ISSN (Print)0161-3782

Other

Other34th International Conference on Coastal Engineering, ICCE 2014
CountryKorea, Republic of
CitySeoul
Period14-06-1514-06-20

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All Science Journal Classification (ASJC) codes

  • Civil and Structural Engineering
  • Ocean Engineering
  • Oceanography

Cite this

Lin, L. C., Liou, J-Y., Hwung, H. H., Bouchette, F., & Meulé, S. (2014). Links between microseisms and extreme waves during typhoons. In P. Lynett (Ed.), Proceedings of the 34th International Conference on Coastal Engineering, ICCE 2014 (Proceedings of the Coastal Engineering Conference; Vol. 2014-January). American Society of Civil Engineers (ASCE).