Abstract of the 246th meeting of CCEP

The 246th meeting of the Coordinating Committee for Earthquake Prediction (CCEP) was held at the Kanto Regional Survey Department of the GSI on February 27, 2027. 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 "intraslab earthquake" was explained.
※The materials on this site are written in Japanese.

• Deliberation about crustal activity monitoring.

1.1 General crustal activities
(1) Seismic activities of Japan.
p2 (JMA)
(2) Strain changes in Japanese Islands.
p3-4 (GSI)





1.2 State of interplate coupling and its change.
(1)Nankai trough and Nansei islands trench.
p5 (NIED)
p6-8 (NIED)
p9 (GSI)
p10(GSI)
p11(GSI)
p12(GSI)
p13-19(JMA)
p20-24(GSI)
p25-26(ISM)





1.3 Others
(1) Earthquake in Aizu, Fukushima Prefecture (January 23, M5.2, M4.7)
p27-28 (JMA)
(2) Seismic activity of the "2024 Noto Peninsula Earthquake" (largest earthquake during the period: November 26, M6.6)
p29-30 (JMA)
(3) Earthquake off the coast of Torishima (December 27, M6.2)
p31 (JMA)
(4) Earthquake off the coast of Ioto Island (November 7, M6.3)
p32 (JMA)
(5) Mariana Islands Earthquake (November 11, M6.0)
p33 (JMA)
(6) Earthquakes in the Kuril Islands (December 8th M6.1, December 27 M6.8)
p34 (JMA)
(7) Earthquake near Taiwan (January 21, M6.1)
p35 (JMA)
(8) Earthquake in the Tibet Autonomous Region (China) (January 7, Mw 7.1)
p36-37 (JMA)
p38-40 (GSI)




• Intensive discussion - Examination of the "intraslab earthquake".

p42-43 Convener：Tomomi Okada(Tohoku University)

-Characteristics of seismicity, stress field and stress drops of earthquakes in the subducting oceanic plate beneath northeastern
p45 Saeko Kita(BRI)




-Oceanic plate structure and seismic activity in the trench-outer rise region
p46 Koichiro Obana(JAMSTEC)




-Mechanism for intra-slab earthquakes illuminated by rock deformation experiments under high pressure and temperature
p47 Sando Sawa (Tohoku University)




-Unique wave propagation and formation of anomalous intensity zones due to deep intra-slab earthquakes.
p48 Takashi Furumura (ERI)

• Purport of next intensive discussion "Earthquakes in the Hyuga-nada region".

p49 Convener：Yuji Yagi(Tsukuba University)

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