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| 2007 Noto earthquake | |
|---|---|
| Name | 2007 Noto earthquake |
| Native name | 能登半島地震 (Noto Hantō Jishin) |
| Caption | Shaking intensity map and epicenter region |
| Date | 2007-03-25 |
| Time | 10:42 JST |
| Magnitude | 6.9 Mj (Japan Meteorological Agency), 6.7 Mw (USGS) |
| Depth | 10 km |
| Epicenter | Noto Peninsula, Ishikawa Prefecture, Japan |
| Type | Strike-slip / reverse (complex) |
| Affected | Ishikawa Prefecture, Noto Peninsula, Hokuriku region, Tokyo (felt) |
| Casualties | 1 dead, ~300 injured |
2007 Noto earthquake was a strong earthquake that struck the Noto Peninsula in Ishikawa Prefecture, Japan, on 25 March 2007, causing damage across the Hokuriku region and shaking that was felt in Tokyo. The event prompted emergency responses by the Japan Self-Defense Forces, Fire and Disaster Management Agency, and local municipalities, and it stimulated a series of seismological studies by institutions such as the Japan Meteorological Agency, Geological Survey of Japan, and numerous universities. The quake highlighted crustal stress along the Nankai Trough-related plate boundaries and renewed attention to seismic hazards in the Sea of Japan margin.
The Noto Peninsula lies on the eastern margin of the Sea of Japan, within a complex plate boundary zone involving the Philippine Sea Plate, Pacific Plate, and the Eurasian Plate as interpreted by the Japan Trench and Nankai Trough frameworks. Historical seismicity in the region includes events cataloged by the Japan Meteorological Agency and documented in studies from the University of Tokyo, Tohoku University, and the National Research Institute for Earth Science and Disaster Resilience. The tectonics of the Hokuriku region involve intraplate deformation, reactivated fault systems, and interactions with older structures such as the Itoigawa-Shizuoka Tectonic Line and offshore fault zones mapped by the Japan Agency for Marine-Earth Science and Technology.
The mainshock occurred at 10:42 JST on 25 March 2007 with a magnitude of 6.9 on the Japan Meteorological Agency scale and ~6.7 moment magnitude as reported by the United States Geological Survey. Focal mechanisms derived by the Seismological Society of Japan and the Geological Survey of Japan indicated a complex combination of strike-slip and reverse faulting at shallow crustal depth near the western coast of the Noto Peninsula, with the epicenter located offshore from Wajima, Ishikawa and near Suzu, Ishikawa. Strong-motion recordings from the K-NET and KiK-net seismic networks documented peak ground accelerations that contributed to building damage assessments led by prefectural authorities and research teams from Kyoto University and Nagoya University.
The earthquake caused one confirmed fatality and approximately 300 injuries, with structural damage concentrated in municipalities including Wajima, Anamizu, and Noto. Traditional wooden houses, modern reinforced concrete structures, and lifelines suffered varying degrees of damage, prompting inspections by the Ministry of Land, Infrastructure, Transport and Tourism and local building bureaus. Cultural heritage sites and regional museums documented non-structural losses, while insurance claims were processed through entities such as the General Insurance Association of Japan and the Fukui Prefectural Government participated in regional recovery coordination.
After the mainshock, the region experienced numerous aftershocks recorded by the Japan Meteorological Agency and international networks including the USGS and Incorporated Research Institutions for Seismology. Significant aftershocks persisted for weeks, with some reaching magnitudes above 5.0, prompting temporary evacuations and continued monitoring by research centers such as the Disaster Prevention Research Institute, Kyoto University and the Earthquake Research Institute, University of Tokyo. Seismicity patterns informed debates in the Science Council of Japan and publications in journals like Earth, Planets and Space and Journal of Geophysical Research.
Immediate response involved municipal emergency services, the Japan Self-Defense Forces, the Fire and Disaster Management Agency (Japan), and volunteer organizations including branches of the Japanese Red Cross Society and local chapters of Seikatsu Club Consumers' Co-operative Union aiding shelters. The Cabinet Office (Japan) coordinated disaster response, mobilizing resources and dispatching inspection teams from the Ministry of Health, Labour and Welfare (Japan) to assist displaced residents. International monitoring centers and foreign embassies in Tokyo issued advisories while academic collaborations accelerated field surveys by teams from Hokkaido University and Osaka University.
The quake disrupted transportation on routes serving the Noto Peninsula, affecting services by operators such as West Japan Railway Company and regional ferry lines, and causing temporary closures of highways overseen by the Ministry of Land, Infrastructure, Transport and Tourism (Japan). Utility interruptions included localized outages of electricity by companies like Hokuriku Electric Power Company and water supply disruptions managed by municipal bureaus. Economic effects were concentrated in fisheries, tourism in places like Noto Kongo Coast, and small-to-medium enterprises documented by the Ishikawa Prefectural Government, with recovery costs estimated by prefectural planners and insurers.
The event stimulated multidisciplinary studies from institutions including the Japan Agency for Marine-Earth Science and Technology, Geological Survey of Japan, Earthquake Research Institute, University of Tokyo, and international partners such as USGS researchers, producing analyses of rupture processes, stress transfer, and ground-motion characteristics published in outlets like Bulletin of the Seismological Society of America and Geophysical Research Letters. Findings emphasized the importance of dense strong-motion networks (K-NET, KiK-net), rapid distribution of seismic data by the Japan Meteorological Agency and National Research Institute for Earth Science and Disaster Resilience, and reinforcement of regional mitigation measures promoted by the Cabinet Office (Japan) and local governments. Lessons informed revisions to seismic hazard maps used by the Ministry of Land, Infrastructure, Transport and Tourism (Japan) and influenced retrofitting programs championed by universities and professional societies such as the Architectural Institute of Japan.
Category:2007 earthquakes Category:Earthquakes in Japan Category:Ishikawa Prefecture