TY - JOUR
T1 - Groundwater-level changes due to pressure gradient induced by nearby earthquakes off Izu Peninsula, 1997
AU - Ohno, Masao
AU - Sato, Tsutomu
AU - Notsu, Kenji
AU - Wakita, Hiroshi
AU - Ozawa, Kunio
PY - 2006/4
Y1 - 2006/4
N2 - Anomalous water level changes were observed at two wells associated with seismic swarm activity off Izu Peninsula on March, 1997. These are coseismic water level drops followed by gradual postseismic water level rise at the time of large earthquakes during the swarm activity. The post-seismic water level rises, which can be fitted by an exponential function with a time constant of about six hours, are explained in terms of the horizontal pressure diffusion due to the pressure gradient in the aquifer induced by the coseismic static strain.
AB - Anomalous water level changes were observed at two wells associated with seismic swarm activity off Izu Peninsula on March, 1997. These are coseismic water level drops followed by gradual postseismic water level rise at the time of large earthquakes during the swarm activity. The post-seismic water level rises, which can be fitted by an exponential function with a time constant of about six hours, are explained in terms of the horizontal pressure diffusion due to the pressure gradient in the aquifer induced by the coseismic static strain.
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U2 - 10.1007/s00024-006-0041-2
DO - 10.1007/s00024-006-0041-2
M3 - Article
AN - SCOPUS:33646375166
SN - 0033-4553
VL - 163
SP - 647
EP - 655
JO - Pure and Applied Geophysics
JF - Pure and Applied Geophysics
IS - 4
ER -