TY - JOUR
T1 - Aftershock observation of the Noto Hanto earthquake in 2007 using ocean bottom seismometers
AU - Yamada, Tomoaki
AU - Mochizuki, Kimihiro
AU - Shinohara, Masanao
AU - Kanazawa, Toshihiko
AU - Kuwano, Asako
AU - Nakahigashi, Kazuo
AU - Hino, Ryota
AU - Uehira, Kenji
AU - Yagi, Takeo
AU - Takeda, Naoto
AU - Hashimoto, Shinichi
N1 - Funding Information:
Acknowledgments. We would like to express our gratitude to Mr. I. Ogino for his help with the preparation for the OBS observation. The skillful work of the officers and crews of the M/V Fujisan-maru is appreciated. Ishikawa Prefectural of Fisheries Co-operative Associations, Prefectural office of Ishikawa, and Mr. M. Nagata of the Ministry of Education, Culture, Sports, Science and Technology (MEXT) cooperated with the OBS observation. The group for the aftershock observations of the 2007 Noto Hanto earthquake provided us information of hypocenters determined by their urgent land seismic network data. We used seismic data from ERI and NIED, information of hypocenters located by JMA, and focal solutions determined by F-net, NIED. This study is supported by the Grant-in-Aid for Special Purposes (No. 19900001), MEXT, Japan. The work is also conducted as a part of the 2nd new program of research and observation for earthquake prediction (2004 to 2008). Comments by reviewers (Dr. S. Kodaira and Dr. Y. Murai) helped us improve the manuscript. Most of the figures were created using GMT (Wessel and Smith, 1995).
PY - 2008
Y1 - 2008
N2 - The Noto Hanto earthquake in 2007 (Mj 6.9) occurred on March 25, 2007 near the west coast of the Noto peninsula, Honshu, Japan. To study the aftershock activity under the sea, we deployed pop-up type ocean bottom seismometers (OBSs) from April 5 to May 8, 2007. We combined data from ten ocean bottom and four onshore seismic stations located around the rupture area of the earthquake and determined the preliminary distribution of the aftershocks. Most of the offshore aftershocks are located in a depth range between 2 and 10 km, and no earthquakes are observed in the lower crust. Hypocenters of deep events occurring at depths greater than 5 km are confined to an area northeastward from the largest aftershock in offshore region. Most of the aftershocks aligned along a high angle and southeast dipping plane, which is consistent with the geometry of the active faults revealed by previous seismic reflection surveys.
AB - The Noto Hanto earthquake in 2007 (Mj 6.9) occurred on March 25, 2007 near the west coast of the Noto peninsula, Honshu, Japan. To study the aftershock activity under the sea, we deployed pop-up type ocean bottom seismometers (OBSs) from April 5 to May 8, 2007. We combined data from ten ocean bottom and four onshore seismic stations located around the rupture area of the earthquake and determined the preliminary distribution of the aftershocks. Most of the offshore aftershocks are located in a depth range between 2 and 10 km, and no earthquakes are observed in the lower crust. Hypocenters of deep events occurring at depths greater than 5 km are confined to an area northeastward from the largest aftershock in offshore region. Most of the aftershocks aligned along a high angle and southeast dipping plane, which is consistent with the geometry of the active faults revealed by previous seismic reflection surveys.
KW - Aftershock distribution
KW - CBS
KW - The 2007 Noto Hanto earthquake
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U2 - 10.1186/BF03352860
DO - 10.1186/BF03352860
M3 - Article
AN - SCOPUS:40949159796
SN - 1343-8832
VL - 60
SP - 1005
EP - 1010
JO - Earth, Planets and Space
JF - Earth, Planets and Space
IS - 10
ER -