Other
Scientific paper
Dec 1999
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999georl..26.3509k&link_type=abstract
Geophysical Research Letters, Volume 26, Issue 23, p. 3509-3512
Other
8
Geodesy And Gravity: Seismic Deformations, Hydrology: Groundwater Hydrology, Seismology: Seismic Hazard Assessment And Prediction, Seismology: Volcano Seismology
Scientific paper
We have observed the groundwater level at Omuroyama-kita (OMR) well on the Izu Peninsula, Japan since October 1994. During the observation period, there were four earthquake swarms. We detected one or two preseismic groundwater level changes together with preseismic crustal deformation recorded at the other nearby stations. Therefore those preseismic groundwater level changes are considered to be caused by crustal deformation or volumetric strain changes. The crustal deformation are inferred to be caused by the magmatic dike intrusion, which is a possible source of the earthquake swarms off the east coast of the Izu Peninsula.
Kamigaichi Osamu
Koizumi Naoji
Matsumoto Norio
Sato Tsutomu
Takahashi Makoto
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