Nankai Trough Earthquake
At the Nankai Trough Earthquake in 1707, the easternmost peak collapsed
Mt. Goken, also known as Mt. Yaguri, is located on the border between Mure and Aji -cho in Takamatsu City, Kagawa Prefecture, and Yaguri Temple, the 85th temple of the 88 temples of Shikoku, is located at its foot. It is said that the mountain originally had five peaks, but at the Nankai Trough Earthquake in 1707, the easternmost peak collapsed, giving the mountain its current shape. This is evidence that only about 300 years ago, there was a tremor big enough to change the shape of the mountain here in Takamatsu City, Kagawa Prefecture.
Japan is located on the boundary of several plates, and the Nankai Trough earthquake is a trench-type earthquake caused by the subduction of the Philippine Sea Plate under the Eurasian Plate. These earthquakes are large-scale earthquakes that have occurred repeatedly in a cycle of about 100 to 150 years, and now, more than 70 years after the last Nankai Trough earthquake in 1946, the imminence of the next Nankai Trough earthquake is increasing. According to the Japanese government's current assumptions (2021), the probability of the next Nankai Trough earthquake occurring within the coming 30 years is 70-80%.
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Storm Surge Disaster
Storm sarge damage caused by Typhoom No.16 in2004
Typhoon No. 16 hit on August 30, 2004, caused a lot of damage due to the storm surge in the center of Takamatsu City. August is the month with the highest tides of the year, and it is said that the arrival of the typhoon on that high tide day was a factor that caused the storm surge to cause more damage.
In the current situation where there are concerns about super typhoons with unprecedented strength due to the effects of global warming, there is no guarantee that areas that have been safe in the past will be safe in the future. It is very important to think about your timeline in case of a disaster so that you can take evacuation action as soon as possible.
Institute of Education, Research and Regional Cooperation for Crisis Management Shikoku
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