Study of S-Wave Microseisms Generated by Storms in the Southeast Australia and North Atlantic,Geophysical Research Letters

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Study of S-Wave Microseisms Generated by Storms in the Southeast Australia and North Atlantic
Geophysical Research Letters ( IF 4.6 ) Pub Date : 2021-07-21 , DOI: 10.1029/2021gl093728
Han Xiao ₁ , Toshiro Tanimoto ₁ , Mei Xue ₂

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Using continuous data from a dense seismic array in Southwestern China, we tracked S-wave microseism sources generated by two storms in Southeast Australia and the North Atlantic. In the frequency band 0.1–0.2 Hz, the beam strengths for SV- and SH-wave sources can reach 29% and 18% of P-wave, respectively. We found that the strong SH-wave is only observed when the seismic sources are near the thick sedimentary regions whereas P- and SV-wave is irrespective of that. It appears that in addition to a three-dimensional structure that is needed for conversion from P-wave to SH-wave, amplitude enhancement by a sedimentary layer is essential for the detection of SH-wave.

更新日期：2021-08-03

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