The Coordinating Committee for Earthquake Prediction, which was formed by earthquake researchers 10 years before the occurrence of the huge earthquake off the coast of Tohoku, held a meeting, and this month, seismic activity in a place with a relatively deep epicenter like the one that occurred off the coast of Fukushima Prefecture. The latest research and observation results were reported, such as the fact that the situation is somewhat active off the coast of Tohoku.
At the Coordinating Committee for Earthquake Prediction held on the 26th, reports were made on the research results and the latest observations of the last 10 years.
Among them, Katsuhiko Shiomi, Senior Researcher of the Institute for Disaster Prevention Science and Technology, said that the number of earthquakes with a magnitude of 5 or more in the aftershock area of a huge earthquake has decreased to almost the same level as before the huge earthquake, but this month it is the largest. He pointed out that seismic activity that occurs at a location deeper than 40 km, such as the earthquake off the coast of Fukushima Prefecture, which observed shaking with a seismic intensity of 6 or higher, continues to be rather active.
From the eastern offshore of Aomori prefecture to the offshore of Iwate prefecture, the situation is still a little active, so caution is required.
In addition, Senior Researcher Bunichiro Shibasaki of the Institute of Architecture explained the research on the interval between large earthquakes, and as a research result of Assistant Professor Reiko Nakata of Tohoku University, the huge earthquake 10 years ago and the large earthquakes before and after it were described. As a result of simulating the subject, we introduced that the interval between occurrences of the magnitude 7 class "Miyagiken-oki Earthquake" may be shorter than the previous 30 to 40 years.
Professor Koshun Yamaoka of Nagoya University Graduate School, who is the chairman of the Coordinating Committee for Earthquake Prediction, said, "It is impossible to predict 100% when, where, and what kind of earthquake will occur, but it is not completely uncertain. I would like to continue making efforts to get people to understand how much they know. "