Exploring the Deep Ocean Single‐Frequency Microseisms Southwest of Japan in Northern Philippine Sea
Abstract Single‐frequency microseisms (SFMs) have been revealed to be only generated in shallow water for decades, while some recent studies reported them in a deep ocean. Using the continuous waveform data recorded by ocean bottom seismometers, we investigate the deep ocean SFMs in the northern Phi...
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| Language: | English |
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Wiley
2022-06-01
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| Series: | Geophysical Research Letters |
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| Online Access: | https://doi.org/10.1029/2021GL097444 |
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| author | Bin Huang Mei Xue Zhen Guo Wenkai Song |
| author_facet | Bin Huang Mei Xue Zhen Guo Wenkai Song |
| author_sort | Bin Huang |
| collection | DOAJ |
| description | Abstract Single‐frequency microseisms (SFMs) have been revealed to be only generated in shallow water for decades, while some recent studies reported them in a deep ocean. Using the continuous waveform data recorded by ocean bottom seismometers, we investigate the deep ocean SFMs in the northern Philippine Sea. Based on the spectrum analysis, we find that the SFMs can be detected in deep ocean and the detection is time variable. To determine the source locations of SFMs, we perform polarization analysis and calculate the cross‐correlation coefficients between SFMs on vertical components and ocean wave energy spectra considering the attenuation of SFMs. Both the polarization and correlation results show that the sources nearby stations dominate the observed Rayleigh‐wave SFMs though distant sources also contribute. Our investigation suggests that the SFMs can be generated in a deep ocean likely by infragravity ocean waves interacting with seafloor topography, which is strengthened by strong ocean storms. |
| format | Article |
| id | doaj-art-caedc33be93544b492748e6a5fcdf281 |
| institution | Kabale University |
| issn | 0094-8276 1944-8007 |
| language | English |
| publishDate | 2022-06-01 |
| publisher | Wiley |
| record_format | Article |
| series | Geophysical Research Letters |
| spelling | doaj-art-caedc33be93544b492748e6a5fcdf2812025-01-22T14:38:16ZengWileyGeophysical Research Letters0094-82761944-80072022-06-014912n/an/a10.1029/2021GL097444Exploring the Deep Ocean Single‐Frequency Microseisms Southwest of Japan in Northern Philippine SeaBin Huang0Mei Xue1Zhen Guo2Wenkai Song3State Key Laboratory of Marine Geology School of Ocean and Earth Science Tongji University Shanghai ChinaState Key Laboratory of Marine Geology School of Ocean and Earth Science Tongji University Shanghai ChinaState Key Laboratory of Marine Geology School of Ocean and Earth Science Tongji University Shanghai ChinaState Key Laboratory of Marine Geology School of Ocean and Earth Science Tongji University Shanghai ChinaAbstract Single‐frequency microseisms (SFMs) have been revealed to be only generated in shallow water for decades, while some recent studies reported them in a deep ocean. Using the continuous waveform data recorded by ocean bottom seismometers, we investigate the deep ocean SFMs in the northern Philippine Sea. Based on the spectrum analysis, we find that the SFMs can be detected in deep ocean and the detection is time variable. To determine the source locations of SFMs, we perform polarization analysis and calculate the cross‐correlation coefficients between SFMs on vertical components and ocean wave energy spectra considering the attenuation of SFMs. Both the polarization and correlation results show that the sources nearby stations dominate the observed Rayleigh‐wave SFMs though distant sources also contribute. Our investigation suggests that the SFMs can be generated in a deep ocean likely by infragravity ocean waves interacting with seafloor topography, which is strengthened by strong ocean storms.https://doi.org/10.1029/2021GL097444microseismspolarization analysissources determinationRayleigh waves attenuationdeep oceanWestern Pacific |
| spellingShingle | Bin Huang Mei Xue Zhen Guo Wenkai Song Exploring the Deep Ocean Single‐Frequency Microseisms Southwest of Japan in Northern Philippine Sea Geophysical Research Letters microseisms polarization analysis sources determination Rayleigh waves attenuation deep ocean Western Pacific |
| title | Exploring the Deep Ocean Single‐Frequency Microseisms Southwest of Japan in Northern Philippine Sea |
| title_full | Exploring the Deep Ocean Single‐Frequency Microseisms Southwest of Japan in Northern Philippine Sea |
| title_fullStr | Exploring the Deep Ocean Single‐Frequency Microseisms Southwest of Japan in Northern Philippine Sea |
| title_full_unstemmed | Exploring the Deep Ocean Single‐Frequency Microseisms Southwest of Japan in Northern Philippine Sea |
| title_short | Exploring the Deep Ocean Single‐Frequency Microseisms Southwest of Japan in Northern Philippine Sea |
| title_sort | exploring the deep ocean single frequency microseisms southwest of japan in northern philippine sea |
| topic | microseisms polarization analysis sources determination Rayleigh waves attenuation deep ocean Western Pacific |
| url | https://doi.org/10.1029/2021GL097444 |
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