The report therefore proposed that if a strong earthquake hits the eastern part of the Nankai Trough, people on the west side, where there is no damage from the first earthquake… A Nankai Trough earthquake is predicted to occur in Japan, causing catastrophic damage over a large area. Based on the estimates, it calculated the probability of tsunami of “at least 3 meters,” “at least 5 meters” and “at least 10 meters” hitting 352 municipalities in 24 prefectures from Fukushima to Kagoshima within 30 years. The areas that tsunami at least 5 meters high could reach total 29 municipalities in seven prefectures. But this time, it showed the degrees of urgency for tsunami that have a high possibility of occurring. Lying a little further south is the Nankai Trough. Cleanup, rescue operations underway in Japan after severe rains kill over 200 people and strand thousands in the recent flooding and landslides in west Japan. Nankai Trough Earthquake : Risk in Tokyo Bay from future tsunami. ÑW À v ]vP } ]o Z} v }À] ]vP } ] ] v(} u ]}v It is necessary to carefully disseminate information related to the Nankai Trough Earthquake so that … In 2012, the government released its estimates on the highest tsunami in case of a Nankai Trough earthquake. This is thanks to constant and great technological progress. The interseismic period data revealed the seafloor speeds resulting from the subduction of the Philippine Sea plate under the Amur plate. The fear is that 323,000 people could be killed in devastation that would be far worse than that caused in the 2011 quake that rocked the country Credit: AFP. These are generally referred to as Nankai Trough Earthquakes. Share: You can copy and redistribute the material in any medium or format, Your email address will not be published. Further technology development is required to enable more detailed interpretation of phenomena and the interplate boundary condition, emergency observations, and observations immediately before and after an earthquake for disaster prevention. It is the Nankai Trough earthquake that is said to occur there. He then worked at the Hydrographic and Oceanographic Department of the Japan Coast Guard. In January 2019 he was appointed Lecturer at Institute of Industrial Science, University of Tokyo (Graduate School of Frontier Sciences, University of Tokyo). However, the lower SDR zones observed in between the high SDR zones could regulate earthquake dynamics, as happened in the 1944 Tonankai earthquake when an earthquake was halted in a low SDR zone. In 2012, the government released its estimates on the highest tsunami in case of a Nankai Trough earthquake. This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License. The detection of the SDR time change (or long-term slow slip event) will be reported in the very near future. Gradient field of undersea sound speed structure extracted from the GNSS-A oceanography, https://doi.pangaea.de/10.1594/PANGAEA.885139, https://www.researchgate.net/profile/Yusuke_Yokota4, http://sgoi.iis.u-tokyo.ac.jp/index_e.html, http://sgoi.iis.u-tokyo.ac.jp/figure/pamphlet_190724e.pdf, https://www1.kaiho.mlit.go.jp/KOHO/chikaku/kaitei/sgs/datalist_e.html, https://researchoutreach.org/articles/new-technology-for-earthquake-prediction-nankai-trough-japan, Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License, Preventing aluminium oxide contamination of dental implant surfaces. It is probably because 1 Introduction The earthquake prediction research is a typical Type 2 Basic Research. Dr Yokota and his team used their measurement techniques to calculate a sound speed profile roughly from the sea surface to the bottom in order to study the characteristics of the ocean water. The speed of sound in water increases with increasing water temperature, increasing salinity and increasing pressure (depth). the seafloor transponders receive acoustic signals from the sea surface transducer and send them back, and the total travel time for the acoustic signal is measured. A future great earthquake involving rupture along this and possibly other segments has been proposed as a major risk for the southern coast of Honshu. Four phases and seven key tasks “Life-saving” phase Task 1 Disseminate timely information, and fully support evacuation from mega tsunami’s landfall in … Below you can select how you’d like us to interact with you and we’ll keep you updated with our latest content. Despite the uncertainty of when such an earthquake will occur, local authorities are already taking action to prepare … You can change your preferences or unsubscribe by clicking the unsubscribe link in the footer of any email you receive from us, or by contacting us at audience@researchoutreach.org at any time and if you have any questions about how we handle your data, please review our privacy agreement. The measurements are made from a survey vessel. Yukinobu Okamura, Masanobu Shishikura, New hypothesis to explain Quaternary forearc deformation and the variety of plate boundary earthquakes along the Suruga–Nankai Trough by oblique subduction of undulations on the Philippine Sea Plate, Earth, Planets and Space, 10.1186/s40623-020-01183-5, … By selecting any of the topic options below you are consenting to receive email communications from us about these topics. AMDA Platform for Nankai Trough Earthquake Disaster Strategy An earthquake instability model is formulated for recurring great earthquakes at the Nankai Trough subduction zone in southwest Japan. The committee calculated the possibility of tsunami as of Jan. 1, 2020, with reference to magnitude-8 or 9-class earthquakes along the Nankai Trough that had happened once in about 100 or 200 years. They also plan to assess any long-term changes in crustal deformation in the regions over the course of the coming decades. Therefore, they have accumulated slip deficit, and could drive shallow ruptures and tsunamis near the trench axis. We optimized the loop kernel for velocity update and intergrid communication on a three-dimensional torus network. Megathrust earthquakes are driven by accumulated interplate slip deficit – so historic megaquakes are thought to have occurred on an interplate boundary with a high slip deficit rate (SDR). 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