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Observation of Teleseismic S Wave Microseisms Generated by Typhoons in the Western Pacific Ocean
Author(s) -
Liu Qiaoxia,
Ni Sidao,
Qiu Yong,
Zeng Xiangfang,
Zhang Baolong,
Wang Fuyun,
Duan Yonghong,
Xu Zhiping
Publication year - 2020
Publication title -
geophysical research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.007
H-Index - 273
eISSN - 1944-8007
pISSN - 0094-8276
DOI - 10.1029/2020gl089031
Subject(s) - microseism , geology , seismology , typhoon , storm , seafloor spreading , wind wave , seismometer , surface wave , geophysics , significant wave height , oceanography , physics , astronomy
Microseisms generated by storms primarily propagate as surface and P waves. However, there has been only one report of S wave microseisms excited by strong storms in the North Atlantic, not from typhoons in the Pacific. In this paper, we present the first observations for S wave microseisms caused by typhoons in Western Pacific, via analyzing ambient seismic waveform recorded by a large‐aperture seismic array in China. The results show that three super typhoons clearly generated S wave microseisms at periods of 5–10 s. The strength of S wave microseism is found to be correlated with P wave. The excitation mechanism for S wave microseism observed in regions with flat seafloor may be related to the interaction between P waves and sub‐ocean sedimentary structure.