Slow Earthquakes in the Microseism Frequency Band (0.1–1.0 Hz) off Kii Peninsula, Japan
Abstract It is difficult to detect the signal of slow deformation in the 0.1–1.0 Hz frequency band between tectonic tremors and very low frequency events, where microseism noise is dominant. Here we provide the first evidence of slow earthquakes in this microseism band, observed by the DONET1 ocean...
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| Format: | Article |
| Language: | English |
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Wiley
2018-03-01
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| Series: | Geophysical Research Letters |
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| Online Access: | https://doi.org/10.1002/2017GL076773 |
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| author | Lisa Kaneko Satoshi Ide Masaru Nakano |
| author_facet | Lisa Kaneko Satoshi Ide Masaru Nakano |
| author_sort | Lisa Kaneko |
| collection | DOAJ |
| description | Abstract It is difficult to detect the signal of slow deformation in the 0.1–1.0 Hz frequency band between tectonic tremors and very low frequency events, where microseism noise is dominant. Here we provide the first evidence of slow earthquakes in this microseism band, observed by the DONET1 ocean bottom seismometer network, after an Mw 5.8 earthquake off Kii Peninsula, Japan, on 1 April 2016. The signals in the microseism band were accompanied by signals from active tremors, very low frequency events, and slow slip events that radiated from the shallow plate interface. We report the detection and locations of events across five frequency bands, including the microseism band. The locations and timing of the events estimated in the different frequency bands are similar, suggesting that these signals radiated from a common source. The observed variations in detectability for each band highlight the complexity of the slow earthquake process. |
| format | Article |
| id | doaj-art-9e4bed781f6b498aa493bfe63f03ab15 |
| institution | OA Journals |
| issn | 0094-8276 1944-8007 |
| language | English |
| publishDate | 2018-03-01 |
| publisher | Wiley |
| record_format | Article |
| series | Geophysical Research Letters |
| spelling | doaj-art-9e4bed781f6b498aa493bfe63f03ab152025-08-20T01:58:15ZengWileyGeophysical Research Letters0094-82761944-80072018-03-014562618262410.1002/2017GL076773Slow Earthquakes in the Microseism Frequency Band (0.1–1.0 Hz) off Kii Peninsula, JapanLisa Kaneko0Satoshi Ide1Masaru Nakano2Department of Earth and Planetary Science The University of Tokyo Tokyo JapanDepartment of Earth and Planetary Science The University of Tokyo Tokyo JapanR&D Center for Earthquake and Tsunami Japan Agency for Marine‐Earth Science and Technology Yokohama JapanAbstract It is difficult to detect the signal of slow deformation in the 0.1–1.0 Hz frequency band between tectonic tremors and very low frequency events, where microseism noise is dominant. Here we provide the first evidence of slow earthquakes in this microseism band, observed by the DONET1 ocean bottom seismometer network, after an Mw 5.8 earthquake off Kii Peninsula, Japan, on 1 April 2016. The signals in the microseism band were accompanied by signals from active tremors, very low frequency events, and slow slip events that radiated from the shallow plate interface. We report the detection and locations of events across five frequency bands, including the microseism band. The locations and timing of the events estimated in the different frequency bands are similar, suggesting that these signals radiated from a common source. The observed variations in detectability for each band highlight the complexity of the slow earthquake process.https://doi.org/10.1002/2017GL076773microseism frequency bandtremorslow earthquakeNankaiVLFDONET1 |
| spellingShingle | Lisa Kaneko Satoshi Ide Masaru Nakano Slow Earthquakes in the Microseism Frequency Band (0.1–1.0 Hz) off Kii Peninsula, Japan Geophysical Research Letters microseism frequency band tremor slow earthquake Nankai VLF DONET1 |
| title | Slow Earthquakes in the Microseism Frequency Band (0.1–1.0 Hz) off Kii Peninsula, Japan |
| title_full | Slow Earthquakes in the Microseism Frequency Band (0.1–1.0 Hz) off Kii Peninsula, Japan |
| title_fullStr | Slow Earthquakes in the Microseism Frequency Band (0.1–1.0 Hz) off Kii Peninsula, Japan |
| title_full_unstemmed | Slow Earthquakes in the Microseism Frequency Band (0.1–1.0 Hz) off Kii Peninsula, Japan |
| title_short | Slow Earthquakes in the Microseism Frequency Band (0.1–1.0 Hz) off Kii Peninsula, Japan |
| title_sort | slow earthquakes in the microseism frequency band 0 1 1 0 hz off kii peninsula japan |
| topic | microseism frequency band tremor slow earthquake Nankai VLF DONET1 |
| url | https://doi.org/10.1002/2017GL076773 |
| work_keys_str_mv | AT lisakaneko slowearthquakesinthemicroseismfrequencyband0110hzoffkiipeninsulajapan AT satoshiide slowearthquakesinthemicroseismfrequencyband0110hzoffkiipeninsulajapan AT masarunakano slowearthquakesinthemicroseismfrequencyband0110hzoffkiipeninsulajapan |