Report of activity
Abstract of the 248th meeting of CCEP
The 248th meeting of the Coordinating Committee for Earthquake Prediction (CCEP) was held at the Kanto Regional Survey Department of the GSI on August 19, 2025. 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 "Changing concepts regarding earthquake prediction and forecasting" was explained. * The materials on this site are written in Japanese.
１.Project proposal to discuss about a future vision of CCEP
A poposal from the chairman Prof. Toda to discuss a new topic "Future vision of CCEP " in a operations working group was approved. p.1-2 Shinji Toda(Tohoku University)
２.Monitoring Crustal Deformation
２.１ General crustal activities
(1) Seismic activities of Japan. p.4 (JMA)
(2) Strain changes in Japanese Islands.
p.5-6 (GSI)
２.２ State of interplate coupling and its change.
(1) Nankai trough and Nansei islands trench.
p.7 ,p.8 (NIED),
p.9 ,p.10-12,p.13-15,p.16-18,p.19-23(GSI)
２.３ Others
(1) Seismic activity of the "2024 Noto Peninsula Earthquake"
(largest earthquake during May 2025- July 2025: June 6, M4.3) p.24-25 (JMA)
(2) Earthquake off the coast of Kushiro (May 31, 17:37, M6.0, 17:39, M5.0) p.26 (JMA)
(3) Earthquakes off the coast of Tokachi (M6.1 on June 2 and M5.2 on June 3)
p.27 (JMA),p.28-29 (GSI)
(4) Earthquakes off the southeast coast of the Nemuro Peninsula (June 19, M6.0; June 22, M6.0)
p.30 (JMA)
(5) Seismic activity off the coast of the Tokara Islands (largest earthquake: M5.6 on July 2)
p.31-39 (JMA) ,p.40-46 (GSI)
(6) Earthquake near Taiwan (May 5th, M6.0) p.47 (JMA)
(7) Earthquake near Taiwan (June 11, M6.0) p.48 (JMA)
(8) Kuril Islands Earthquake (June 14, M6.2) p.49 (JMA)
(9) Earthquake off the east coast of the Kamchatka Peninsula, Russia (July 30, Mw 8.8)
p.50-63 (JMA),p.64-66 (GSI)
３.Intensive discussion
Changing concepts regarding earthquake prediction and forecasting
p.68 Convener：Shinji Toda(Tohoku University),Takane Hori(JAMSTEC),Shinya Tsukada(JMA)
-Earthquake prediction, Earthquake forecast, Geophysical forecast
p.70 Shinya Tsukada(JMA)
-The development of weather forecasting
p.71 Yoshiaki Sato(JMA)
-Forecasting through visualization of spatio-temporal changes in crustal activity
p.72 Takane Hori (JAMSTEC)
-Comprehensive understanding of deformation processes driving earthquakes
p.73 Aitaro Kato (ERI)
４.Purport of next intensive discussion
Two Years after the 2024 Noto Peninsula Earthquake: Current Understanding and Remaining Challenges
５.Report of the Operations Working Group
Topics of next 3 times of Intensive discussion has been selected.
p.75 Operations Working Group