2003 Tokachi earthquake

Earthquake in Japan 2003 Tokachi earthquake 平成15年（2003年）十勝沖地震 (Heisei15-nen (2003-nen) Tokachi-Oki Jishin) 2003-09-25 19:50:06 usp000c8kv 7134409 26 September 2003 04:50:06 JST (UTC+9) USGS United States Geological Survey ShakeMap 2003年十勝沖地震による苫小牧での石油タンクの火災.jpg Oil tank fire in Tomakomai 8.0 j y8.3 w y 27 km 41.78 N 143.86 E type:event_scale:50000000 inline,title Megathrust Hokkaido, Iwate and Aomori Prefectures, Japan 6- MMI 9 ¥213 billion (US$1.9 billion, equivalent to $3.32 billion in 2025) 4.4 m ft Yes 181 ≥w4.0Strongest: w 7.4 2 fatalities (1 indirect), 849 injuries, 1 missing 1.11 g 1,091 Gal The 2003 Tokachi earthquake, known in Japanese as the 2003 Tokachi-Oki earthquake 平成15年十勝沖地震 Heisei jūgo-nen Tokachi-Oki jishin, occurred off the coast of Hokkaido, Japan on 26 September at 04:50 local time (19:50 UTC 25 September). At a focal depth of 27 km (17 mi), this great undersea earthquake measured 8.3 on the moment magnitude scale, making it the most powerful earthquake of 2003, as well as one of the most intense earthquakes to hit Japan since modern record-keeping began in 1900. The Hokkaido earthquake caused extensive damage, damaging roads all around Hokkaidō, and triggered power outages and extensive landslides.M 8.2 - 134 km SSW of Kushiro, Japan 2003 usp000c8kv Over 800 people were injured.http://www.neduet.edu.pk/Civil/2004-1.pdf https://web.archive.org/web/20061004095348/http://www.neduet.edu.pk/Civil/2004-1.pdf dead October 4, 2006 S. F. A. Rafeeqi and S. H. Lodi Earthquakes Cause Damages in Pakistan, Iran, Japan and Morocco Cowasjee Earthquake Study Centre April 2004 May 20, 2012 The earthquake also caused a tsunami reaching 4.4 m ft in height. Tectonic setting The location and moment tensor solution of this earthquake are consistent with it being a result of thrust faulting between the North American plate and the subducting Pacific plate. In addition to experiencing large thrust earthquakes that originate on the interface between the plates, eastern Hokkaidō experiences great earthquakes that originate from the interior of the subducted Pacific plate. The region experienced a catastrophic earthquake and tsunami with an estimated magnitude of 9.0 a few decades before 1667,AIST http://www.aist.go.jp/aist_e/latest_research/2005/20050120/20050120.html Transient Uplift After a 17th-Century Giant Earthquake in Hokkaido December 10, 2004 May 20, 2012 https://web.archive.org/web/20120420192837/http://www.aist.go.jp/aist_e/latest_research/2005/20050120/20050120.html April 20, 2012 dead a magnitude 8.2 event in 1952,http://www.kagakunavi.jp/document/show/53/documents かがくナビ > 読む > 科学よみもの > 地球科学現象の解明に役立つ地震研究 kagakunavi.jp 15 January 2022 https://web.archive.org/web/20120316110755/http://www.kagakunavi.jp/document/show/53/documents 16 March 2012 dead a 1968 quake measuring 8.3 w, and one in 2008 measuring 7.1, all bearing the name Tokachi-Oki, and a 1973 event to the immediate north along the Kuril Trench plate boundary. Earthquake With a magnitude of j y 8.0, or w y 8.3,ISC-GEM Global Instrumental Earthquake Catalogue (1904–2018) http://www.isc.ac.uk/iscgem/index.php ISC 2022 International Seismological Centre Version 9.1 the earthquake occurred as the result of shallow megathrust faulting on or near the plate interface between the overriding North American Plate and the subducting Pacific Plate. According to a finite fault model provided by the United States Geological Survey (USGS), earthquake rupture was recorded on an area of around 240 km mi × 210 km mi with a majority of the slip being concentrated on a 120 km mi × 115 km mi patch of the torn subduction interface and a maximum slip of 7.746 m ft. The earthquake had a maximum intensity of Shindo 6- on the Japan Meteorological Agency seismic intensity scale, which was observed in Kushiro, Tokachi and Hidaka Subprefectures.26 September 2003 Earthquake information https://www.data.jma.go.jp/eqdb/data/shindo/index.html#20030926045007 12 July 2025 Japan Meteorological Agency It also measured IX (Violent) on the Modified Mercalli intensity scale.Kenji Hirata Yuichiro Tanioka Kenji Satake Shigeru Yamaki Eric L. Geist The tsunami source area of the 2003 Tokachi-oki earthquake estimated from tsunami travel times and its relationship to the 1952 Tokachi-oki earthquake Earth, Planets and Space 2004 56 3 367–372 10.1186/BF03353066 2004EP&S...56..367H 55586940 https://www.researchgate.net/publication/228869488 free By 31 December 2003, there were 181 aftershocks measuring w 4.0 or higher.USGS earthquake catalog United States Geological Survey https://earthquake.usgs.gov/earthquakes/map/?extent=40.54303,141.55884&extent=43.32118,148.23853&range=search&timeZone=utc&search=%7B%22name%22:%22Search%20Results%22,%22params%22:%7B%22endtime%22:%222003-12-31T19:50:06.360Z%22,%22latitude%22:41.815,%22longitude%22:143.91,%22maxradiuskm%22:120,%22minmagnitude%22:4,%22starttime%22:%222003-09-25T19:50:06.360Z%22%7D%7D The largest of them measured w 7.4 and struck at 21:08 UTC.M 7.4 - 119 km ESE of Shizunai-furukawachō, Japan 2003 usp000c8mb At 09:06 UTC on 8 October, a w 6.7 aftershock occurred near Kushiro.M 6.7 - 39 km SSE of Kushiro, Japan 2003 usp000c9x7 +Locations with a seismic intensity of Shindo 5- and higherIntensity Locations6− Kushiro Town, Toyokoro, Makubetsu, Shikaoi, Urakawa, Shinhidaka, Niikappu, Akkeshi5+Kushiro, Betsukai, Teshikaga, Honbetsu, Ashoro, Sarabetsu, Hiroo, Obihiro, Atsuma5−Shinshinotsu, Kuriyama, Iwamizawa, Naganuma, Nanporo, Tomakomai, Memuro, Otofuke, Kamishihoro, Nakafurano, Kunneppu, Kitami, Kiyosato Damage and casualties Despite the earthquake's great intensity, structural damage to the region was comparatively light; the epicenter was located nearly 100 km mi nmi offshore, with most structures in its vicinity reported to be resistant to earthquake shaking.http://www.absconsulting.com/resources/Catastrophe_Reports/Hokkaido%20EQ_FIN.pdf The 2003 Tokachi-oki Earthquake of September 26 1, 19 American Bureau of Shipping EQE Japan Division 2003 2011-05-18 https://web.archive.org/web/20110928141105/http://www.absconsulting.com/resources/Catastrophe_Reports/Hokkaido%20EQ_FIN.pdf 2011-09-28 dead The majority of the destruction was confined to coastal areas, such as sea and fishing ports, mostly inflicted by subsequent tsunami waves. Although soil liquefaction was observed over a broad geological area, it occurred in localized areas almost exclusively limited to man-made embankments.http://www.eeri.org/lfe/pdf/Japan_Hokkaido_Article_Nov03.pdf EERI Newsletter Volume 37, Number 11 November 2003 2011-06-01 EERI 2024-09-07 https://web.archive.org/web/20240907141734/http://www.eeri.org/lfe/pdf/Japan_Hokkaido_Article_Nov03.pdf live The earthquake affected a total of 36 local rivers, including the major Abashiri and Ishikari Rivers. At least 849 people were injured; 847 in Hokkaido and one each in Aomori and Iwate Prefectures, with 69 of the injuries being serious.Significant Earthquake Database https://www.ngdc.noaa.gov/hazel/view/hazards/earthquake/search National Geophysical Data Center / World Data Service (NGDC/WDS) National Geophysical Data Center, NOAA 10.7289/V5TD9V7K 1972 Data Set Monetary losses in Hokkaido amounted to at least ¥213 billion (2003 JPY), or $1.9 billion (2003 USD).http://www.kiso.co.jp/pdfs/jishin/2003tokachi/2higaigaiyo.PDF ja:被害の概要 Kiso-Joban Company 2003 2011-05-18 1–2 https://web.archive.org/web/20120324055117/http://www.kiso.co.jp/pdfs/jishin/2003tokachi/2higaigaiyo.PDF 2012-03-24 dead ja One person died after being hit by a car while cleaning up earthquake damage.Strong quake hits north Japan https://news.bbc.co.uk/2/hi/3141074.stm BBC News 26 September 2003 25 December 2022 7 September 2024 https://web.archive.org/web/20240907141846/http://news.bbc.co.uk/2/hi/3141074.stm live The tsunami swept away two fishermen in the Tokachi River near Toyokoro, killing one and leaving the other missing.平成15年（2003年）十勝沖地震 https://www.jma-net.go.jp/sapporo/jishin/2003tokachi.html ja Japan Meteorological Agency 14 July 2025 The earthquake and tsunami destroyed several oceanside home communities and damaged many others. Over 1,500 houses or buildings, most of them in Kushiro city, suffered considerable damage, with of a total of 141 reported to be partially or completely destroyed. Strong shaking affected many bridges in the region, some sustaining severe damage due to relative motion between spans in excess of design standards. The center of the Rekifune Bridge, located in Taiki, Hiroo, was reported to have sunk about 0.12 m (0.39 ft) at the joint section following significant ground deformation. Some local schools were also damaged, ranging from shattered windows to severed expansion joints and columns. Two town halls in Kushiro and Taiku suffered partial collapses. At Kushiro Airport, the tremor caused the control tower ceiling to collapse, prompting officials to halt control work for several days. Small cracks were reported in the gates of the Takami Dam, though no threat of dam failure existed.http://www.mlit.go.jp/bosai/disaster/saigaijyouhou/h15/tokachi_jishin_18.pdf ja:平成１５年（２００３年）十勝沖地震について MLIT 2003-10-03 2011-05-17 6–7 ja 2011-03-23 https://web.archive.org/web/20110323233749/http://www.mlit.go.jp/bosai/disaster/saigaijyouhou/h15/tokachi_jishin_18.pdf live Several sea ports in the area sustained moderate damage, such as cracks and collapsing walls, due to lateral ground spreading caused by liquefaction. Some 123 coastal fishing ports and facilities in eastern Hokkaido reported significant damage, with an additional 25 ports damaged in Iwate. At least three major ports were affected by the disaster; Kushiro's port sustained sever damage to one of its piers as a result of ground displacement and sand boils.http://www.eeri.org/lfe/pdf/Japan_Hokkaido_Insert_Dec03.pdf Preliminary Observations on the Tokachi-Oki, Japan Earthquake of September 26, 2003 December 2003 2011-06-01 EERI 2011-09-27 https://web.archive.org/web/20110927162039/http://www.eeri.org/lfe/pdf/Japan_Hokkaido_Insert_Dec03.pdf live Tsunami waves stranded several small boats onshore; various ship containers and oil tanks along coastlines sustained damage. The earthquake left marine oil spills in its wake, though the conditions were quickly normalized.http://www.bousai.go.jp/kinkyu/030926kushiro/030926kushiro1430.pdf ja:釧路沖を震源とする地震について 2003-09-26 2011-05-18 Cabinet Office, Government of Japan 4 https://web.archive.org/web/20110928141004/http://www.bousai.go.jp/kinkyu/030926kushiro/030926kushiro1430.pdf 2011-09-28 dead ja See also Japan Earth sciences List of earthquakes in 2003 List of earthquakes in Japan References External links 7134409 eq-2003-000476-jpn Tokachi Earthquake, 2003 Tokachi Earthuqake, 2003 Category:Earthquakes of the Heisei era Category:Megathrust earthquakes in Japan Category:2003 tsunamis Category:September 2003 in Japan Category:Landslides in Japan Category:2003 disasters in Japan Category:Kushiro