Journal
EARTH PLANETS AND SPACE
Volume 66, Issue -, Pages -Publisher
SPRINGER HEIDELBERG
DOI: 10.1186/1880-5981-66-114
Keywords
Geofluids; Seismic velocity structure; Seismicity; Naruko volcano; 2008 Iwate-Miyagi Nairiku earthquake
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Funding
- Scientific Research Program on Innovative Areas, 'Geofluids: Nature and Dynamics of Fluids in Subduction Zones,' at the Tokyo Institute of Technology [21109002]
- Grants-in-Aid for Scientific Research [21109001] Funding Source: KAKEN
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Geofluids is important for understanding volcanic and earthquake generation processes. In this study, we obtained a detailed seismic velocity structure in and around the Naruko volcano, northeastern Japan, using data from a dense seismic observation network. We found a distinct seismic low-velocity zone (LVZ) beneath the Naruko volcano, with a diameter of nearly 10 to 20 km in the lower crust. This LVZ could correspond to a magma chamber. We also found a seismic low-velocity zone beneath the aftershock region of the 2008 Iwate-Miyagi Nairiku earthquake. This LVZ could correspond to an area with overpressurized fluid, which promoted the occurrence of the 2008 Iwate-Miyagi Nairiku earthquake.
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