It shows that areas potentially affected by the Nankai Trough earthquake are largely distant from the epicenter of the … The Nankai Trough is an ocean-floor trench which runs underneath the Pacific Ocean off the coast of Japan from Shizuoka to Kyūshū, where the Philippine Sea Plate sinks below the Eurasian Plate. The Nankai Trough earthquake is a type of megathrust earthquake anticipated to occur along the Nankai Trough off the Pacific coast. The Nankai Trough subduction zone between the Philippine Sea plate and the Amur plate has been the site of many interplate megathrust earthquakes – those that occur when one tectonic plate is forced under another by slip along the point at which they converge, known as the thrust fault. Answers to these questions provide insight toward better utilization of earthquake science in mitigation policy-making. This irregular behavior suggests that in addition to the regular Nankai Trough earthquake cycle of 100–150 years, there is a hyperearthquake cycle of 300–500 years. Categories . Predicted maximum seismic intensities from a Nankai Trough megaquake from 7, the strongest shaking on the scale, down to 3 and below. The SVLFEs migrated or spread eastward along the strike direction of the trench during large SVLFE episodes. Nankai Trough Evaluation Study Group “No special changes observed” January 10, 18:32. Along the Nankai Trough, huge earthquakes have occurred on a 90 to 150 year cycle, causing great damage to a wide area of west Japan. The results of this study have some reference value in understanding the distribution and characteristics of the Asian catastrophic earthquakes. May 2018 (DOI: 10.13140/R. We use data from seismic surveys, drilling expeditions, and laboratory experiments to construct detailed 2D models of the subduction zones with realistic geometry, structure, friction, and prestress. Before calculating the coherence function in each window the trend is removed by polynomial of 4th order and 3-sigma winsorizing was performed. In this session, panelists will discuss their collective work in the areas of disaster scenarios, recovery governance, municipality administration, collaboration with civil society, economic sustainability, community resilience, and housing and urban planning. In the worst case, deaths are forecast to exceed 230,000, which would be more than 10 times greater than the toll from the Great East Japan Earthquake of March 2011. A “Nankai Trough quake” is a large-scale earthquake with its epicenter at the meeting point of these plates. 2002), the seismicity of regular earthquakes along the Nankai Trough, especially interplate earthquakes, is quite low. Translated and edited by Nippon.com. Categories. The Nankai Trough extends from off the coast of central Japan to the southwest. The analysis shows no significant trend, upward or, The Hanshin earthquake (the Hyogoken–Nanbu earthquake) caused tremendous losses of life and property mainly due to the failure of civil engineering facilities. Over 70 years have passed since the most recent shakes, the 1944 Tōnankai earthquake and the 1946 Nankai earthquake. Asian large earthquakes after 1950 and disasters analysis. The forecast can be read in detail in the tr, : Special thanks to: Lyubushin A. for his w. The dense GPS network at Japan islands (more than 1300 stations) provides the data for detail investigation of the Earth surface tremor. Accordingly, it is important to prepare for major earthquakes as part of daily life. This analysis shows that earthquakes cause roughly 2.5B in annual-average damages and have caused about 430B in total damages since 1900. Greater prestress and rate … A so-called Nankai Trough megaquake is predicted to occur, with 70% to 80% likelihood, within the next 30 years. ), [© Fuji News Network, Inc. All rights reserved. The frequency of this case is once in 15 years. It is quite probable that the Chinese seismologists, making an intensive effort toward more confident future prediction, and having as an advantage the occurrence of earthquakes within monitoring networks, have the best set of earthquake precursory data the world, In order to compare earthquake losses on an "apples-to-apples" basis, the record of U.S. earthquakes since 1900 is normalized for societal change by correcting for inflation, wealth increase and population. Provided us of a severe Nankai Trough has experienced repeated quakes at regular 100- to 150-year.. Of 4th order and 3-sigma winsorizing was performed No special changes observed ” 10... 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