The Earthquake Research Committee announced in May 2013 that the chance of a quake of magnitude 8 or more happening in the Nankai Trough within 30 years was between 60 and 70 percent. 1904~1995 . In the recent Showa-Nankai earthquake occurred in December 1946, there were severe damage such as 1,330 casualties, 11,591 houses in complete destruction, 2599 buildings burned, 2,991 vessels damaged and destroyed. The magnitude was 8.6, and it triggered a large tsunami. Recent studies of slow earthquakes along plate boundaries have shown that tectonic tremor, low-frequency earthquakes, very-low-frequency events (VLFEs), and slow-slip events (SSEs) often accompany each other and appear to share common source faults.However, the source processes of slow events occurring in the shallow part of plate boundaries are not well known because seismic observations … With this background, the GNSS network in Japan has detected transients along the Suruga and Nankai trough subduction zones from approximately 2013, after the 2011 Tohoku earthquake (Ozawa et al. We propose, based on geologic data on crustal movements of the forearc wedge, that these earthquake variations are controlled by two separate locked zones in the deeper part of the plate … Nihonkai Chubu Earthquake / Approx. The Showa-Nankai earthquake also caused coastal subsidence of at least 0.3 m or more in this area, such that groins built to stand above spring high tides were submerged to about 0.3 m depth at spring tides after the earthquake (Editing Committee of the History of Tokushima Prefecture 1963). 140 people / 5 - 6 m. 1968. number=22. This map takes into account every possible situation in order to hypothesize the largest conceivable earthquake. pages=195-202. Earthquake . The tsunami washed away the building statue of the Great Buddha in Kamakura. Chilean Earthquake and Tsunami / Approx. Earthquakes in and around Japan . On the irregular tide just before the Showa Nankai earthquake (D31-09)(abs.) Nankai Trouph earthquake occurrence by BPT distribution.png 840 × 450; 17 KB Nankai-Tonankai-Tokai earthquake history.png 500 × 1,660; 442 KB Otani-showa.jpg 2,592 × 1,944; 2.12 MB Huge Polling Flops in U.S. Election: The ‘Great Blue Wave’ for Biden Never Arrived Simulation of the Great Earthquakes along the Nankai Trough: An Attempt to Simulate Event History, Slip Areas of the Showa Tonankai / Nankai Earthquakes, Heterogeneous Slip Deficit Rate Distribution, and Long-term Slow Slips Fuyuki Hirose1, Kenji Maeda2, Kenichi Fujita1, and Akio Kobayashi1 Sea level fluctuation over 12 hours was recorded on tide gauge in Tosashimizu Bay at the time of the 1944 Showa Tonankai Earthquake tsunami. Along from the Nankai Trough to the Ryukyu Trench, shallow slow earthquake seismicity has been found by some previous studies. Publish_Country=Japan. Request PDF | On Jan 1, 2013, Atsushi Mikami and others published DAMAGE TO LEVEES DURING THE SHOWA-NANKAI EARTHQUAKE | Find, read and cite all the research you need on ResearchGate Seismic Intensigy Evaluation of the Showa-Nankai Earthquake based on the Experienced Person's Testimony and the Unevenness of Seismic Intensity. Thus, it is necessary to analyze and monitor long-term slow slip events in southwest Japan. Authors=NAKAMURA Fujio Journal/Book_names=Programme and Abstracts, the Seismological Society of Japan, Fall Meeting The 1944 Tonankai earthquake (M 7.9) and the 1946 Nankai earthquake (M 8.0), the most recent pair, occurred 2 years apart. two Nankai Trough Earthquakes, the 1944 Showa Tonankai Earthquake and the 1946 Showa Nankai Earthquake (Figure 1). On the other hand, the Hoei earthquake had a seismic-b.eq similar to those of the Showa earthquakes. About 70 years have passed since the occurrence of these earthquakes, which is about half the average recurrence interval of a Nankai Trough 100 people / More than 6 m. 1993. We set characteristic displacement L in 0.05-0.20 m on slip distributions of the Showa Tonankai / Nankai earthquakes and in 7.5 m on regions corresponding to small slip deficit rate distributions. In addition, the strong measures to be taken after the Tokai Earthquake prediction have become regarded as not appropriate considering the uncertainty of short-term prediction, that is, the Recently, ocean bottom observation using seismometer and pressure gauge successes to document shallow slow earthquakes activity occurring in some subduction zones [e.g., Ito et al., 2013; Yamashita et al., 2015; Wallace et al., 2017]. Besides limited instrumental data of seismic waves and tsunami, distribution of ground shaking (seismic intensity) and tsunami heights (4–9 m) were documented. The cores has no evidence of tsunami sediment such as Ansei Nankai (M8.4) and Showa Nankai (M8.0) earthquakes. 50 people / 3 - 5 m. 1983. Tōkai, Tōnankai and Nankai earthquakes occurred at the same time with magnitude 8.4–8.6. The last event was the 1946 Nankai earthquake (the Showa Nankai earthquake). Showa Nankai, 1946 Showa Tonankai, 1944 . To be ready for a national crisis should the Nankai Trough Mega Earthquake occur, we are making every effort to promote various operations. Nankai (Southern sea) Trough Earthquake The frequency of occurrence of the Nankai Trough Earthquake assumed by this map is 1/1,000years or lower, but if it occurs, Tsushima city will suffer serious damage. “Nankai Trough Mega Earthquake Operation Plan” at a glance (This video is in Japanese only.) Slow earthquakes, as defined by anomalously low rupture velocity, reflect a different slip regime than fast faulting of regular earthquakes. 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