Some figures were plotted using the GMT software (Wessel & Smith 1991).". Based on a combination of P-wave first motions and inversion of surface wave spectral amplitudes, we propose a normal-faulting focal mechanism (φ = 200°, δ = 61° and λ= 271°) and a seismic moment M0 = (7 ± 1) × 1028 dyn cm (Mw = 8.5). Die Sanriku-Küste ist als eine Zone häufig auftretender Tsunamis bekannt, die in der Vergangenheit eine Reihe besonders schwerer Tsunamikatastrophen erlebt hat … which used exclusively arrival times at Japanese stations. Sanriku tsunami of 1896, in which 2859 people (about 95% of the total population) were killed. Some figures were plotted using the GMT software (Wessel & Smith 1991). author = "Okal, {Emile A.} This study uses advanced methods to investigate this event using far-field seismological and tsunami data and complements a sister study by Uchida et al. Because this earthquake occurred about 290 km (180 mi) off the coast of Honshu, most of the casualties and damage were caused by the large tsunami that was generated, instead of directly from the earthquake itself. Tsunamis können als integraler Bestandteil der Geschichte der Sanriku-Region betrachtet werden. This study emphasizes the need to include off-trench normal-faulting earthquake sources in global assessments of tsunami hazards emanating from the subduction of old and cold plates, whose total length of trenches exceed 20 000 km, even though only a handful of great such events are known with confidence in the instrumental record.". Later studies found that tsunamis in general become larger in V-shaped bays when the earthquake occurs relatively close to shore. Relocated aftershocks show a band of genuine shallow aftershocks parallel to the Japan Trench under the outer trench slope and a region of post-mainshock events landward of the trench axis that occur over roughly the same latitude range and are thought to be the result of stress transfer to the interplate thrust boundary following the normalfaulting rupture. (adsbygoogle = window.adsbygoogle || []).push({}); Your email address will not be published. A great earthquake occurred on March 2, 1933 (UTC DATE) in the Sanriku region of Japan and generated a destructive tsunami that caused extensive damage along the Sanriku coast of the Tohoku region of the island of Honshu. 2012), 1611 Keicho (Hatori 2009), 1896 Meiji Sanriku (Tanioka and Satake 1996; Tanioka and Seno 2001), 1933 Sanriku (Kanamori 1971), and 2011 Tohoku-oki earthquakes (Ozawa et al. The strong power of the earthquake caused a tsunami with almost 30 m height. The most recent tsunami entirely destroyed the newly-constructed … The Sanriku region was the most affected area in Japan. After 83 yr, the great normal-faulting earthquake of 1933 March 2, which took place off the Japan Trench and produced a devastating tsunami on the Sanriku coast and damaging waves in Hawaii, remains the largest recorded normal-faulting earthquake. RESEARCH ARTICLE Open Access Paleo-tsunami history along the northern Japan Trench: evidence from Noda Village, northern Sanriku coast, Japan Taiga Inoue1*, Kazuhisa Goto2, Yuichi Nishimura3, Masashi Watanabe4, Yasutaka Iijima1,5 and Daisuke Sugawara2,6 Abstract Throughout history, large tsunamis have frequently affected the Sanriku area of the Pacific coast of the Tohoku Dit systeem is een samenwerking tussen 26 verschillende landen rondom de Stille Oceaan om eventuele tsunami-activiteiten voortijdig te meten en daarop adequaat te kunnen reageren. Because of the steep-sloped valleys, alluvial deposits are … Based on a combination of P-wave first motions and inversion of surface wave spectral amplitudes, we propose a normal-faulting focal mechanism (φ = 200°, δ = 61° and λ= 271°) and a seismic moment M0 = (7 ± 1) × 1028 dyn cm (Mw = 8.5). The 1933 Sanriku earthquake (昭和三陸地震 Shōwa Sanriku Jishin?) At least six layers of tsunami deposit during the recent 500 years were found in a small valley on the Sanriku coast, just north of Taro (Miyako city, Iwate prefecture), where the 2011 tsunami heights from the Tohoku earthquake ranged from 17 to 34 m. The Sanriku coast is a Ria coast characterized by sawtooth-shaped coastline. Abstract. ACKNOWLEDGEMENTS We are grateful to Hiroo Kanamori for sending us a preliminary write up of his solution for the moment of the 1933 earthquake, and to Naoki Uchida for collaboration and a data set of Uchida et al. März 1933 (Shōwa 8) 290 km östlich von Japan ereignete. 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