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1896 Sanriku earthquake
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1896 Sanriku earthquake
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title | 1896 Sanriku earthquake|pre-1900= yes|image = Sanriku Great Tsunami.JPG|image alt =
| Moment magnitude scale>Mw, 7.2 Surface wave magnitude | NISHIMURA | AUTHOR2=MIURA S. | AUTHOR4=HASHIMOTO K. | AUTHOR6=HORI S. | AUTHOR8=KONO T. | AUTHOR10=MISHINA M. | AUTHOR12=MIYAZAKI S. | YEAR=2000 | JOURNAL=TECTONOPHYSICS | ISSUE=3â4 | DOI=10.1016/S0040-1951(00)00108-6 | ACCESSDATE=14 NOVEMBER 2011, 2000Tectp.323..217N, |depth=Shallow | 39.5 | display=inline,title}} | Megathrust earthquake>Megathrust|countries affected = Japan, United States|damage = Tsunami | 38.2 | ft | Kesen District, Iwate>Kesen, Iwate Prefecture | , TÅhoku region>TÅhoku|casualties = 22,066 people dead or missing}}The 1896 Sanriku earthquake was one of the most destructive seismic events in Japanese history. The 8.5 magnitude earthquake occurred at 19:32 (local time) on June 15, 1896, approximately {{convert|166|km}} off the coast of Iwate Prefecture, Honshu. It resulted in two tsunamis which destroyed about 9,000 homes and caused at least 22,000 deaths. The waves reached a then-record height of {{convert|38.2|m}}; this would remain the highest on record until waves from the 2011 TÅhoku earthquake exceeded that height by more than {{convert|2|m}}.WEB,weblink March 11th tsunami a record 40.5 metres high NHK, .nhk.or.jp, 13 August 2011, 15 June 2018,weblink" title="web.archive.org/web/20110728013451weblink">weblink 28 July 2011, yes, dmy-all, Seismologists have discovered the tsunami's magnitude (Mt = 8.2)JOURNAL, Abe, K., 1981, Physical size of tsunamigenic earthquakes of the northwestern Pacific, Phys. Earth Planet. Inter., 27, 3, 194â205, 10.1016/0031-9201(81)90016-9, 1981PEPI...27..194A, was much greater than expected for the estimated seismic magnitude. This earthquake is now regarded as being part of a distinct class of seismic events, the tsunami earthquake.JOURNAL, Kanamori, H., 1972, Mechanism of tsunami earthquakes, Phys. Earth Planet. Inter., 6, 5, 346â359,weblink 10.1016/0031-9201(72)90058-1, 1972PEPI....6..346K, yes,weblink" title="web.archive.org/web/20110614131951weblink">weblink 2011-06-14, Geology(File:Meiji-Sanriku earthquake 02.jpg|thumb|left|Houses heavily damaged by the earthquake)The epicenter lies just to the west of the Japan Trench, the surface expression of the west-dipping subduction zone. The trench forms part of the convergent boundary between the Pacific and Eurasian plates.JOURNAL, Tanioka, Yuichiro, Sataka K., 1996, Fault parameters of the 1896 Sanriku Tsunami Earthquake estimated from Tsunami Numerical Modeling, Geophysical Research Letters, 23, 3, 1549â1552, 10.1029/96GL01479,weblink 1996GeoRL..23.1549T,MagnitudeThe unusual disparity between the magnitude of the earthquake and the subsequent tsunami may be due to a combination of forces:
TsunamiOn the evening of June 15, 1896, communities along the Sanriku coast in northern Japan were celebrating a Shinto holiday and the return of soldiers from the First Sino-Japanese War. After a small earthquake, there was little concern because it was so weak and many small tremors had also been felt in the previous few months. However 35 minutes later the first tsunami wave struck the coast, followed by a second a few minutes later.Corkill, Edan, "Heights of survival", Japan Times, 12 June 2011, pp. 9â10. Damage was particularly severe because the tsunamis coincided with high tides. Most deaths occurred in Iwate and Miyagi although casualties were also recorded from Aomori and Hokkaido.The power of the tsunami was great: large numbers of victims were found with broken bodies or missing limbs.WEB,weblink The Great Meiji Sanriku Tsunami June 15, 1896, at the Sanriku coast of the Tohoku region, Nakao, Masayuki, 2009-10-18,weblink" title="web.archive.org/web/20081223230738weblink">weblink 2008-12-23, yes, As was their normal practice each evening, the local fishing fleets were all at sea when the tsunamis struck. In the deep water the wave went unnoticed. Only when they returned the next morning did they discover the debris and bodies.BOOK, Kusky, Timothy M., Geological hazards: a sourcebook, Greenwood Press, 2003, 312,weblink 978-1-57356-469-4, Wave heights of up to {{convert|9|m|ft|sp=us}} were also measured in Hawaii. They destroyed wharves and swept several houses away.WEB,weblink Today in Earthquake History: June 15, USGS, 2009-10-18, JOURNAL, Hatori, Tokutaro, 1963, On the Tsunamis along the Island of Hawaii, Bulletin of the Earthquake Research Institute, 41, 49â59,weblinkweblink" title="web.archive.org/web/20111006004245weblink">weblink yes, 2011-10-06,LegacyPreventive coastal measures were not implemented until after another tsunami struck in 1933. Due to higher levels of tsunami awareness, fewer casualties were recorded following the Sanriku earthquake. Nevertheless, the earthquake of 11 March 2011 caused a huge tsunami that resulted in thousands of deaths across the same region and the nuclear disaster at Fukushima.See also
References{{commons category|1896 Meiji-Sanriku earthquake}}{{Reflist}}{{JapanTrenchMegathrust}}{{Earthquakes in Japan}} |
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