TY - JOUR
T1 - P-wave velocity structure beneath Asama Volcano, Japan, inferred from active source seismic experiment
AU - Aoki, Yosuke
AU - Takeo, Minoru
AU - Aoyama, Hiroshi
AU - Fujimatsu, Jun
AU - Matsumoto, Satoshi
AU - Miyamachi, Hiroki
AU - Nakamichi, Haruhisa
AU - Ohkura, Takahiro
AU - Ohminato, Takao
AU - Oikawa, Jun
AU - Tanada, Rie
AU - Tsutsui, Tomoki
AU - Yamamoto, Keigo
AU - Yamamoto, Mare
AU - Yamasato, Hitoshi
AU - Yamawaki, Teruo
N1 - Funding Information:
We are grateful to the participants of the active seismic experiment. The active seismic experiment is supported by the National Project for the Prediction of Volcanic Eruption and Japan Meteorological Agency . Comments by an anonymous reviewer improved the manuscript. Some figures are created with the Generic Mapping Tools ( Wessel and Smith, 1998 ).
Copyright:
Copyright 2009 Elsevier B.V., All rights reserved.
PY - 2009/11/10
Y1 - 2009/11/10
N2 - An active seismic survey with unprecedented density of seismometers found a high velocity zone to the west of the summit of Asama Volcano, Japan. The high velocity zone coincides with an area of magma-filled crack (dike) intrusion associated with the 2004 eruptions inferred from precise earthquake relocations and ground deformation modeling. It also coincides with an area of high resistivity surrounded by low resistivity, indicating that the solidification of magma due to repeating intrusions is responsible for the high velocity. This thus endorses the magma pathway previously speculated by seismic and geodetic observations. These findings demonstrate that dense seismic exploration combined with geophysical monitoring is an effective way to understand the dynamics of volcanic eruptions.
AB - An active seismic survey with unprecedented density of seismometers found a high velocity zone to the west of the summit of Asama Volcano, Japan. The high velocity zone coincides with an area of magma-filled crack (dike) intrusion associated with the 2004 eruptions inferred from precise earthquake relocations and ground deformation modeling. It also coincides with an area of high resistivity surrounded by low resistivity, indicating that the solidification of magma due to repeating intrusions is responsible for the high velocity. This thus endorses the magma pathway previously speculated by seismic and geodetic observations. These findings demonstrate that dense seismic exploration combined with geophysical monitoring is an effective way to understand the dynamics of volcanic eruptions.
KW - P-wave velocity structure
KW - active source seismic experiment
KW - dike intrusion
KW - magma pathway
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U2 - 10.1016/j.jvolgeores.2009.09.004
DO - 10.1016/j.jvolgeores.2009.09.004
M3 - Article
AN - SCOPUS:70350244374
SN - 0377-0273
VL - 187
SP - 272
EP - 277
JO - Journal of Volcanology and Geothermal Research
JF - Journal of Volcanology and Geothermal Research
IS - 3-4
ER -