The tsunami height that had been initially predicted by the tsunami warning system was lower than the actual tsunami height; this error contributed to the delayed escape of some residents. This is the fourth largest earthquake in the world and the largest in Japan since instrumental recordings began in 1900. The large number of views made the video one of the most popular examples of sonification on the web. NHK BS News reported 2011-04-03-02:55 JST, One estimate of 10–15 minutes came from German seismologist Rainer Kind of the, Another estimate of 15–30 minutes came from Vasily V. Titov, director of the. Overall electricity consumption during July and August was also 14% less than in the previous year. 8 years ago. But most deaths occur on the coast closest to the epicenter. [95] These are expected changes[40] for an earthquake of this magnitude. On March 11, 2011, at 2:46 p.m. local time, a magnitude-9.0 earthquake ruptured a 500-kilometer-long fault zone off the northeast coast of Japan. According to some reports, one wave penetrated some 6 miles (10 km) inland after causing the Natori River, which separates Sendai from the city of Natori to the south, to overflow. Cities and towns listed here reported at least US$100,000 in damage or at least one death. [368], 754 cultural properties were damaged across nineteen prefectures, including five National Treasures (at Zuigan-ji, Ōsaki Hachiman-gū, Shiramizu Amidadō, and Seihaku-ji); 160 Important Cultural Properties (including at Sendai Tōshō-gū, the Kōdōkan, and Entsū-in, with its western decorative motifs); one hundred and forty-four Monuments of Japan (including Matsushima, Takata-matsubara, Yūbikan, and the Site of Tagajō); six Groups of Traditional Buildings; and four Important Tangible Folk Cultural Properties. Most of these deaths occurred during the first six months after the earthquake and the number dropped thereafter, but as time has passed, the number has continued to increase. Friday’s biggest quake occurred 80 miles offshore and 15.2 miles underwater in a subduction zone called the Japan Trench, part of that plate boundary. MORE. A tsunami—Japanese for “harbor wave”—is a series of powerful waves caused by the displacement of a large body of water. [295], The Fukushima Daiichi, Fukushima Daini, Onagawa Nuclear Power Plant and Tōkai nuclear power stations, consisting of a total eleven reactors, were automatically shut down following the earthquake. Be on the lookout for your Britannica newsletter to get trusted stories delivered right to your inbox. [121], An upthrust of 6 to 8 metres (20 to 26 ft) along a 180 kilometres (110 mi) wide seabed at 60 kilometres (37 mi) offshore from the east coast of Tōhoku[122] resulted in a major tsunami that brought destruction along the Pacific coastline of Japan's northern islands. Relevance. At this time Japan's Disaster Management Office (Naikakufu Bosai Keikaku) published a bi-lingual guide in Japanese and English, Disaster Management in Japan, to outline the several varieties of natural disaster and the preparations being made for the eventuality of each. The waves were expected to come ashore over a period of several hours, with the highest and most powerful expected at 0930 (1730 GMT), Geophysicist Gerard Fryer at the Pacific Tsunami Warning Center in Honolulu said high water reached Port Orford at 0730 (1530 … ", Liquefaction driving away Chiba residents, Tokyo Disneyland's parking lot shows the risk of reclaimed land, "Japan Earthquake May Have Shifted Earth's Axis", "Magnitude 7.1 – NEAR THE EAST COAST OF HONSHU, JAPAN", "Fresh quake triggers tsunami warning in Japan", "Four dead as new tremor hits Japan disaster zone", "At least 6 killed in new Japan earthquake", "USGS 10-degree Map Centered at 35°N,140°E of earthquakes of magnitude 4.5 or over", "Aftershocks Associated With Impaired Health Caused by the Great East Japan Disaster Among Youth Across Japan: A National Cross-Sectional Survey Interact J Med Res 2013;2(2):e31", "Alert sounded a minute before the tremor struck", 経験則からのずれ ―はじめの数秒と強震動：τc, Pd，スペクトル，簡易震源域推定方法―, "Earthquake Early Warning and Tsunami Warning of JMA for the 2011 off the Pacific Coast of Tohoku Earthquake", "Tsunami warnings issued for at least 20 countries after quake", "Distance between Dichato, Chile and Sendai, Japan is 17228km", "Chile Lifts Tsunami Alerts After Japan Quake Spawns Waves", "Chilean site: (Tsunami) waves penetrated 70–100 m in different parts of the country", "Tsunami Information (Estimated Tsunami arrival time and Height)", Helmholtz Research Centre for Geosciences, Japan's tsunami victims only had 15 minutes warning, National Oceanic and Atmospheric Administration, Japan tsunami: Toll could rise to more than 1,300, "News: Tsunami rolls through Pacific, Sendai Airport under water, Tokyo Narita closed, Pacific region airports endangered", "10-meter tsunami observed in area near Sendai in Miyagi Pref", "Japan 8.9-magnitude earthquake sparks massive tsunami", "Earthquake, tsunami wreak havoc in Japan", Tsunami hit more than 100 designated evacuation sites, "9,500 unaccounted for in Miyagi's Minamisanriku: local gov't", "東北地方太平洋沖地震を教訓とした地震・津波対策に関する専門調査会中間とりまとめ", U.S. rescue teams find devastation in northern city of Ofunato, "Whole towns gone-no cars or people seen", "Honderden doden in Japanse kuststad (Hundreds dead in Japanese coastal town)" (in Dutch), "Japan army says 300–400 bodies found in Rikuzentakata: Report", Miyagi coastal whaling port pulverized, little more than memory, 'Nothing can prepare you to witness this', Tsunami Slams Japan After Record Earthquake, Killing Hundreds, "Japan disaster: 30 powerful images of the earthquake and tsunami", Survivors on cut-off isle were ready for disaster, Tsunami Information NUMBER 64 (Tsunami Observation), "Tsunami Information NUMBER 64(Tsunami Observations)", "Executive Summary of Urgent Field Survey of Earthquake and Tsunami Disasters by the 2011 off the Pacific coast of Tōhoku Earthquake", "Researchers: 30-meter tsunami in Ofunato", "38-meter-high tsunami triggered by 11 March quake: survey", Earthquake Research Institute, University of Tokyo, "東北地方太平洋沖地震による津波被害を踏まえた津波警報の改善の方向性について（最終とりまとめ）", "Evacuate all coastal areas immediately, Hawaii Civil Defense says", "Text of PTWC Pacific-wide tsunami warning", "Tsunami from Japanese quake prompts evacuation of 11,000 residents on Russia's Pacific islands", "Tsunami Warning and Advisory No. In … Problems in issuing updates also contributed to delays in evacuations. [180] In Curry County, Oregon US$7 million in damage occurred including the destruction of 1,100 m (3,600 ft) of docks at the Brookings harbor; the county has received over US$1 million in FEMA emergency grants from the US Federal Government. This resulted in an underestimation of the tsunami's height in initial reports. At 2:46 pm (0546 GMT) of March 11, 2011, a 9.0-magnitude underwater quake struck the Pacific seabed roughly 130 kilometres (80 miles) east of Japan's Miyagi prefecture. [36][70][71] Three tsunami deposits have been identified within the Holocene sequence of the plain, all formed within the last 3,000 years, suggesting an 800 to 1,100 year recurrence interval for large tsunamigenic earthquakes. [94] The axial shift was caused by the redistribution of mass on the Earth's surface, which changed the planet's moment of inertia. Scientific information about the Tōhoku earthquake, Satellite Photos of Japan, Before and After the Quake and Tsunami, Japan in Crisis: A Series of Interviews with Scholars by Peter Shea at the University of Minnesota, Special: The Tōhoku-Oki Earthquake, Japan, Japan Gigantic Earthquake and Tsunami 2011, The East Japan Earthquake Archive (Testimonies of survivors, Photographs and Videos on Google Earth), Gross, Richard. Japan Earthquake and Tsunami 2011 (Direct Relief photo) Immediately following the disaster, Direct Relief and the Japanese American Citizens League established the Japan Relief and Recovery Fund, committing 100 percent of all contributions to be used exclusively to help people in Japan in the most productive, efficient manner possible. The rolling blackouts brought on by the crises at the nuclear power plants in Fukushima had a profound effect on the rail networks around Tokyo starting on 14 March. [301], The Energy Commissioner of the European Union Günther Oettinger addressed the European Parliament on 15 March, explaining that the nuclear disaster was an "apocalypse". The tsunami raced outward from the epicentre at speeds that approached about 500 miles (800 km) per hour. [212] As of March 2012, Japanese police data showed that 70% of the 3,279 still missing were aged 60 or over, all found, including 893 in their 70s and 577 in their 80s. The earthquake was caused by the rupture of a stretch of the subduction zone associated with the Japan Trench, which separates the Eurasian Plate from the subducting Pacific Plate. [333][334] All railway services were suspended in Tokyo, with an estimated 20,000 people stranded at major stations across the city. But most deaths occur on the coast closest to the epicenter. The one contingency not envisioned in the Japan government’s disaster planning was the awesome size of the tsunami, and how this could affect the nation’s nuclear power plants. 22 March 2011 On Friday, March 11, Japan was rocked by an earthquake. Fishing equipment was scattered on the high cliff above the bay. The earthquake is often referred to in Japan as the Great East Japan Earthquake (東日本大震災, Higashi nihon daishinsai)[14][15][fn 1] and is also known as the 2011 Tōhoku earthquake,[30] the Great Sendai Earthquake,[31] the Great Tōhoku Earthquake,[31] and the great earthquake of March 11. A ship washed ashore during the 2011 Japan tsunami lies amidst wreckage in Kesennuma, Miyagi, Japan. [59][60] According to a 2020 study, "the earthquake and its aftermaths resulted in a 0.47 percentage point decline in Japan’s real GDP growth in the year following the disaster. Also, observed data from tidal meters that were located off the coast were not fully reflected in the second warning. [324] The plant was shut down as a precaution. Japan's monster quake: Do scientists have key to decode future tremblors? [114], One minute before the earthquake was felt in Tokyo, the Earthquake Early Warning system, which includes more than 1,000 seismometers in Japan, sent out warnings of impending strong shaking to millions. 5 Answers. The Japan Meteorological Agency assigned a magnitude of 7.4 MJMA, while the U.S. Geological Survey lowered it to 7.1 Mw. It was the fifth most powerful earthquake ever recorded, and within 30 minutes, a 133-foot high tsunami pummeled Japan's northeastern shoreline. [159] The tsunami washed away the sole bridge to Miyatojima, Miyagi, isolating the island's 900 residents. [242] His body was found on 2 April 2011 along Ocean Beach in Fort Stevens State Park, Oregon, 530 km (330 mi) to the north. An upthrust of 6 to 8 metres (20 to 26 ft) along a 180 kilometres (110 mi) wide seabed at 60 kilometres (37 mi) offshore from the east coast of Tōhoku resulted in a major tsunami that brought destruction along the Pacific coastline of Japan's northern islands. For the best answers, search on … Because tsunami walls had been overtopped, the committee also suggested, besides building taller tsunami walls, also teaching citizens how to evacuate if a large-scale tsunami should strike. The economic impact included both immediate problems, with industrial production suspended in many factories, and the longer term issue of the cost of rebuilding which has been estimated at ¥10 trillion ($122 billion). The Japanese Foreign Ministry confirmed the deaths of nineteen foreigners. It is believed that the early warning by the Japan Meteorological Agency (JMA) saved many lives. Get a Britannica Premium subscription and gain access to exclusive content. [311] Later, a state of emergency was also declared at the Fukushima Daini nuclear power plant about 11 km (6.8 mi) south. c. Nuclear Meltdown in 2011 Earthquake in Japan. The largest fault slip ever recorded caused the tsunami that hit Japan. However, the strong quake had exceeded the measurement limit of all of the teleseismometers within Japan, and thus it was impossible to calculate the moment magnitude based on data from those seismometers. All damaged dams are functioning with no problems. [194][196], After a 2 m (6 ft 7 in) high surge hit Chile, it was reported that the reflection from those surges traveled back across the Pacific, causing a 30–60 cm (12–24 in) surge in Japan, 47–48 hours after the earthquake, according to observation from multiple tide stations [ja], including in Onahama, Owase, and Kushimoto. Subsequent analysis found that many Japanese nuclear plants, including Fukushima Daiichi, were not adequately protected against tsunamis. The event began with a powerful earthquake off the coast of Honshu, Japan’s main island, which initiated a series of large tsunami waves that devastated many coastal areas. People were displaced, a nuclear reactor was in trouble, and the world watched as a tsunami flooded Japan, threatened the islands of the Pacific, and ultimately hit the western coasts of North and South America. Hence, earthquakes in this area with magnitudes of about 7 since 1926 had only released part of the accumulated energy. There may be a need to replace the contaminated soil. Massive magnitude 9.0 earthquake happened off coast of Japan on Friday, March 11th 2011 at 2:46pm local time (05:46 GMT), which triggered the tsunami that hit Japan a few minutes later. Researchers soon after the full extent of the disaster was known launched a project to gather all digital material relating to the disaster into an online searchable archive to form the basis of future research into the events during and after the disaster. [241], The tsunami was reported to have caused several deaths outside Japan.
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