Relation between earthquake swarm activity and tides in the Noto region, Japan

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...

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Bibliographic Details
Published inEarth, Planets and Space Vol. 76; no. 1; pp. 37 - 13
Main Authors Hirose, Fuyuki, Tamaribuchi, Koji, Kobayashi, Akio, Maeda, Kenji
Format Journal Article
LanguageEnglish
Published Berlin/Heidelberg Springer Science and Business Media LLC 28.02.2024
Springer Berlin Heidelberg
Springer
Springer Nature B.V
SpringerOpen
Subjects
4. Seismology
Crust
Crustal deformation
Crustal fluids
Deformation
Earth
Earth and Environmental Science
Earth Sciences
Earthquake magnitude
Earthquake swarm
Earthquakes
Environmental aspects
Fluid pressure
Fracture strength
Frequency distribution
G
Geodesy
Geography. Anthropology. Recreation
Geology
Geophysics/Geodesy
Gutenberg–Richter law
Japan
Noto region
Observations
QB275-343
QE1-996.5
Seismic activity
Seismic waves
Seismicity
Texas
The 2024 M7.6 Noto Peninsula earthquake and seismic swarm
Tidal effects
Tide
Tides
Texas
Japan
Earthquake swarm
Tide
Noto region
Crustal fluids
Gutenberg–Richter law
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Summary: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 of the Gutenberg–Richter law (describing the earthquake magnitude–frequency distribution) and observed crustal deformation are consistent with this interpretation. Graphical Abstract
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ISSN:1880-5981
1343-8832
1880-5981
DOI:10.1186/s40623-024-01985-x