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| Noto Peninsula earthquake (2007) | |
|---|---|
| Name | Noto Peninsula earthquake (2007) |
| Native name | 能登半島地震 (2007年) |
| Date | 2007-03-25 |
| Time | 09:41 JST |
| Magnitude | 6.9 Mj (Japan Meteorological Agency) |
| Depth | 11 km |
| Location | Noto Peninsula, Ishikawa Prefecture, Japan |
| Countries affected | Japan |
| Casualties | 1 dead, 332 injured |
Noto Peninsula earthquake (2007) The 2007 Noto Peninsula earthquake struck off the coast of the Noto Peninsula in Ishikawa Prefecture, Japan on 25 March 2007, causing widespread shaking across Hokuriku, Hokuriku and parts of Chūbu. The event produced significant structural damage, disruptions to rail services, and prompted emergency response from agencies including the Fire and Disaster Management Agency and local prefectural authorities. Scientific institutions such as the Japan Meteorological Agency and the Japan Agency for Marine-Earth Science and Technology rapidly characterized the event.
The earthquake occurred near the western coast of the Noto Peninsula in northern Ishikawa Prefecture, affecting municipalities including Wajima, Nanao, and Suzu. Strong ground motion was recorded in cities like Kanazawa and smaller towns along the Sea of Japan coast. The event triggered landslides in rural slopes, damage to coastal infrastructure, and temporary closures of sections of the Hokuriku Main Line and other regional railways. National media such as NHK and agencies including the Japan Meteorological Agency provided continuous coverage.
The seismicity of the Noto Peninsula region is governed by the complex interaction of the Eurasian Plate, North American Plate (often referred to as the Okhotsk Plate in local studies), and the subducting Pacific Plate and Philippine Sea Plate. The western coast of Honshu near the Sea of Japan is subject to intraplate seismicity and deformation associated with back-arc processes linked to the Japan Trench and broader Pacific Ring of Fire. The 2007 event has been interpreted by researchers at institutions such as the National Research Institute for Earth Science and Disaster Resilience and the University of Tokyo as resulting from reverse faulting on shallow crustal faults beneath the peninsula, consistent with focal mechanisms reported by the Japan Meteorological Agency and global agencies like the United States Geological Survey.
The Japan Meteorological Agency initially reported a magnitude of 6.9 on the JMA scale with a hypocenter depth of about 11 km. The United States Geological Survey and other international centers provided complementary moment magnitude estimates. Strong-motion records from installed instruments operated by the National Research Institute for Earth Science and Disaster Resilience (NIED) and the Ministry of Land, Infrastructure, Transport and Tourism captured peak ground accelerations that informed engineering assessments. The focal mechanism indicated predominantly reverse (thrust) faulting, and subsequent aftershock sequences were monitored by networks including the Hi-net seismic array and regional observatories at Kanazawa University.
Damage was concentrated in coastal towns along the Noto Peninsula, with collapsed traditional wooden houses in Wajima and damage to modern reinforced concrete structures in Nanao. Landslides and rockfalls affected routes such as parts of National Route 249 and local roads, disrupting access to remote communities. Ports and fishing infrastructure in the Sea of Japan harbors suffered damage, impacting local fisheries and prompting inspections of seawalls and quays. Critical lifelines including power distribution by regional utilities such as Hokuriku Electric Power Company and water services experienced interruptions. Cultural heritage sites and shrines in the region were inspected following reports of structural damage.
Official tallies compiled by the Ishikawa Prefectural Police and the Fire and Disaster Management Agency reported one fatality and hundreds of injuries, with approximately 332 people treated for injuries ranging from minor to severe. The sole reported fatality involved a collapse-related incident in a residential area. Evacuations were ordered in at-risk zones, and temporary shelters were established in gymnasia and municipal buildings overseen by local municipal governments including Wajima City Hall and Nanao City Hall.
Immediate emergency response mobilized units from the Japan Self-Defense Forces, the Japanese Red Cross Society, prefectural disaster response teams, and volunteer organizations. The Ministry of Land, Infrastructure, Transport and Tourism coordinated road clearance and infrastructure inspections, while rail operators such as West Japan Railway Company and local private lines conducted safety checks before resuming services. Reconstruction aid and subsidies were administered under national disaster assistance frameworks involving the Cabinet Office (Japan) and the Ministry of Finance (Japan), with longer-term recovery plans developed by the Ishikawa Prefectural Government. International monitoring organizations and academic groups offered technical support for aftershock hazard assessment.
The 2007 event prompted renewed attention to seismic hazard along the Sea of Japan margin and to shallow crustal faulting beneath the Noto Peninsula. Studies by institutions such as the Geological Survey of Japan and the University of Tokyo reassessed fault maps and building-code considerations, influencing retrofitting priorities for heritage structures and municipal facilities. Enhanced early warning utilization by the Japan Meteorological Agency and expanded deployment of strong-motion sensors by NIED followed as part of broader resilience measures after the event. The earthquake also informed regional tsunami preparedness exercises coordinated by the Japan Coast Guard and local port authorities, even though the event produced limited tsunami effects. The legacy of the 2007 quake persists in updated hazard zoning and continued research into the seismic behavior of western Honshu.
Category:Earthquakes in Japan Category:2007 earthquakes Category:Ishikawa Prefecture