TY - JOUR
T1 - Seismic velocity structure in and around the Naruko volcano, NE Japan, and its implications for volcanic and seismic activities Geofluid processes in subduction zones and mantle dynamics 4. Seismology
AU - Okada, Tomomi
AU - Matsuzawa, Toru
AU - Nakajima, Junichi
AU - Uchida, Naoki
AU - Yamamoto, Mare
AU - Hori, Shuichiro
AU - Kono, Toshio
AU - Nakayama, Takashi
AU - Hirahara, Satoshi
AU - Hasegawa, Akira
N1 - Funding Information:
This work was conducted under the support of the Scientific Research Program on Innovative Areas, ‘Geofluids: Nature and Dynamics of Fluids in Subduction Zones,’ at the Tokyo Institute of Technology (21109002). We used data from JMA and Hi-net/NIED. This study is also a part of the ‘multidisciplinary research project for high strain rate zone’ promoted by the Ministry of Education, Culture, Sports, Science and Technology (MEXT), Japan. Some of the temporary stations are operated cooperatively with the JNES. We thank Prof. Yasuo Ogawa (TITECH), Dr. Hikaru Iwamori (JAMSTEC), Prof. Michihiko Nakamura, Prof. Tohru Watanabe (Toyama U), Dr. Takashi Hoshide (Akita U), Dr. Masaaki Ichiki, Prof. Dapeng Zhao, Prof. Norihito Umino, Prof. Takeyoshi Yoshida, and Prof. Eiichi Takahashi (TITECH) for valuable discussions. We acknowledge the efforts towards seismic observation by T. Sato, K. Tachibana, S. Suzuki, T. Demachi, T. Kaida, and Y. Chiba. The comments by Dr. Toh (the associate editor), and two anonymous reviewers improved the manuscript well.
Publisher Copyright:
© 2014 Okada et al.; licensee Springer.
PY - 2014/12/1
Y1 - 2014/12/1
N2 - 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.
AB - 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.
KW - 2008 Iwate-Miyagi Nairiku earthquake
KW - Geofluids
KW - Naruko volcano
KW - Seismic velocity structure
KW - Seismicity
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U2 - 10.1186/1880-5981-66-114
DO - 10.1186/1880-5981-66-114
M3 - Article
AN - SCOPUS:84919388533
SN - 1343-8832
VL - 66
JO - Earth, Planets and Space
JF - Earth, Planets and Space
IS - 1
M1 - 114
ER -