Report of activity
Abstract of the 250th meeting of CCEP
The 250th meeting of the Coordinating Committee for Earthquake Prediction (CCEP) was held at the Kanto Regional Survey Department of the GSI on February 20, 2026. And the meeting was onsite and online confference. Firstly, the nationwide monitoring data of the seismic activity was reported. Secondary, the CCEP members discussed the intensive discussion subject ”10 Years After the Kumamoto Earthquake: Current Understanding and Future Challenges” was explained. * The materials on this site are written in Japanese.
１.Monitoring Crustal Deformation
１.１ General crustal activities
(1) Seismic activities of Japan. p.2 (JMA)
(2) Strain changes in Japanese Islands. p.3-4 (GSI)
(3) Seismic activities of Japan. p.5 (ISM)
１.２ State of interplate coupling and its change.
(1) Japan trench,Chishima trench.
p.6-13,p.14-23 (JMA),
p.24-35 (GSI),
p.36 (JMA),
p.37 (JAMSTEC),
(2) Nankai trough and Nansei islands trench.
p.38-39 (NIED),
p.40-43 ,p.44 ,p.45-49(GSI),
１.３ Others
(1) Earthquake southeast off Etorofu Island (January 13, M6.3)
p.50 (JMA)
(2) Seismic activity in eastern Shimane Prefecture (largest earthquake: M6.4 on January 6th)
p.51-52 (JMA) ,p.53-56(GSI)
(3) Crustal movements in the area surrounding the earthquake activity in northern Yamaguchi Prefecture since February 2025
p.57-61 (GSI)
(4) The earthquake in the Aso region of Kumamoto Prefecture on November 25, 2025
p.62-63 (GSI)
(5) Seismic activity near the Tokara Islands from June 21, 2025
p.64-68 (GSI)
(6) Earthquake near Taiwan (December 28, M7.0)
p.69 (JMA)
(7) Earthquake off the coast of Ioto Island (January 22, M6.5)
p.70 (JMA)
２.Intensive discussion
”10 Years After the Kumamoto Earthquake: Current Understanding and Future Challenges”
p.72 Convener：Satoshi Matsumoto(Kyushu Univ.)
-Revisiting the long-term tectonic evolution of central Kyushu
p.74 Kiyokazu Oohashi（AIST）
-Paleoseismic excavations on surface ruptures associated with the 2016 Kumamoto earthquake
p.75 Tomokazu Kobayashi（GSI）
-Background of the 2016 Kumamoto Earthquake and the Current State of Seismic Activity
p.76 Satoshi Matsumoto(Kyushu Univ.)
-Paleoseismic excavations on surface ruptures associated with the 2016 Kumamoto earthquake
p.77 Daisuke Ishimura (Chiba Univ.)
-Spatial Relationship between Crustal Resistivity Structure and Earthquake Rupture
p.78 Hiroki Aizawa (Kyushu Univ.)
３.Purport of next intensive discussion
Earthquake Research Utilizing Information Science
p.79 Convener：Naoshi Hirata (Tokyo Univ.),Hiromichi Nagao(ERI)