Relation between earthquake swarm activity and tides in the Noto region, Japan
Abstract The Noto region in Japan has been experiencing earthquake swarm activity since mid-2018, with repeated rises and falls in activity. Crustal deformation (expansion and uplift) observed there since the end of 2020 has been connected to crustal fluids. Studies in other regions have suggested t...
| Main Authors: | , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
SpringerOpen
2024-02-01
|
| Series: | Earth, Planets and Space |
| Subjects: | |
| Online Access: | https://doi.org/10.1186/s40623-024-01985-x |
| _version_ | 1797219931746467840 |
|---|---|
| author | Fuyuki Hirose Koji Tamaribuchi Akio Kobayashi Kenji Maeda |
| author_facet | Fuyuki Hirose Koji Tamaribuchi Akio Kobayashi Kenji Maeda |
| author_sort | Fuyuki Hirose |
| collection | DOAJ |
| description | Abstract The Noto region in Japan has been experiencing earthquake swarm activity since mid-2018, with repeated rises and falls in activity. Crustal deformation (expansion and uplift) observed there since the end of 2020 has been connected to crustal fluids. Studies in other regions have suggested that tides are related to earthquake swarm activities associated with crustal fluids. Therefore, we investigated whether tides are also involved in the Noto earthquake swarm activity. Our results suggest a tidal correlation only at greater depths in the southern part of the analyzed area (‘region Sd’). There, we inferred that an increase in pore fluid pressure caused by the inflow of deep fluids may have led to a decrease in fault fracture strength, making the local seismicity relatively susceptible to the effects of tidal forces. The significantly high value in region Sd of the scaling parameter $$b$$ b of the Gutenberg–Richter law (describing the earthquake magnitude–frequency distribution) and observed crustal deformation are consistent with this interpretation. Graphical Abstract |
| first_indexed | 2024-03-07T15:15:01Z |
| format | Article |
| id | doaj.art-687b53fad43143a093fe90ba9788d095 |
| institution | Directory Open Access Journal |
| issn | 1880-5981 |
| language | English |
| last_indexed | 2024-04-24T12:41:29Z |
| publishDate | 2024-02-01 |
| publisher | SpringerOpen |
| record_format | Article |
| series | Earth, Planets and Space |
| spelling | doaj.art-687b53fad43143a093fe90ba9788d0952024-04-07T11:11:22ZengSpringerOpenEarth, Planets and Space1880-59812024-02-0176111310.1186/s40623-024-01985-xRelation between earthquake swarm activity and tides in the Noto region, JapanFuyuki Hirose0Koji Tamaribuchi1Akio Kobayashi2Kenji Maeda3Meteorological Research Institute, Japan Meteorological AgencyMeteorological Research Institute, Japan Meteorological AgencyMatsushiro Seismological Observatory, Japan Meteorological AgencyMeteorological Research Institute, Japan Meteorological AgencyAbstract The Noto region in Japan has been experiencing earthquake swarm activity since mid-2018, with repeated rises and falls in activity. Crustal deformation (expansion and uplift) observed there since the end of 2020 has been connected to crustal fluids. Studies in other regions have suggested that tides are related to earthquake swarm activities associated with crustal fluids. Therefore, we investigated whether tides are also involved in the Noto earthquake swarm activity. Our results suggest a tidal correlation only at greater depths in the southern part of the analyzed area (‘region Sd’). There, we inferred that an increase in pore fluid pressure caused by the inflow of deep fluids may have led to a decrease in fault fracture strength, making the local seismicity relatively susceptible to the effects of tidal forces. The significantly high value in region Sd of the scaling parameter $$b$$ b of the Gutenberg–Richter law (describing the earthquake magnitude–frequency distribution) and observed crustal deformation are consistent with this interpretation. Graphical Abstracthttps://doi.org/10.1186/s40623-024-01985-xTideNoto regionEarthquake swarmCrustal fluidsGutenberg–Richter law |
| spellingShingle | Fuyuki Hirose Koji Tamaribuchi Akio Kobayashi Kenji Maeda Relation between earthquake swarm activity and tides in the Noto region, Japan Earth, Planets and Space Tide Noto region Earthquake swarm Crustal fluids Gutenberg–Richter law |
| title | Relation between earthquake swarm activity and tides in the Noto region, Japan |
| title_full | Relation between earthquake swarm activity and tides in the Noto region, Japan |
| title_fullStr | Relation between earthquake swarm activity and tides in the Noto region, Japan |
| title_full_unstemmed | Relation between earthquake swarm activity and tides in the Noto region, Japan |
| title_short | Relation between earthquake swarm activity and tides in the Noto region, Japan |
| title_sort | relation between earthquake swarm activity and tides in the noto region japan |
| topic | Tide Noto region Earthquake swarm Crustal fluids Gutenberg–Richter law |
| url | https://doi.org/10.1186/s40623-024-01985-x |
| work_keys_str_mv | AT fuyukihirose relationbetweenearthquakeswarmactivityandtidesinthenotoregionjapan AT kojitamaribuchi relationbetweenearthquakeswarmactivityandtidesinthenotoregionjapan AT akiokobayashi relationbetweenearthquakeswarmactivityandtidesinthenotoregionjapan AT kenjimaeda relationbetweenearthquakeswarmactivityandtidesinthenotoregionjapan |