Abstract of the 234th meeting of CCEP

  The 234th meeting of the Coordinating Committee for Earthquake Prediction (CCEP) was held at the web conference of GSI on Feb. 25, 2022. Firstly, the nationwide monitoring data of the seismic activity and the crustal deformations were reported. Secondary, the CCEP members discussed the intensive discussion subject "Current understanding of slow earthquakes" was explained. Finally, the purport of next intensive discussion subject "Crustal activities of the Sea of Japan region off Northeast Japan" 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) Activities of shallow and very-low-frequency earthquakes around Japan.
      p3 (NIED)
(3) Strain changes in Japanese Islands.
      p4 (GSI)

1.2 State of interplate coupling and its change.
(1) Suruga trough, Nankai trough and Nansei islands trench.
      pp5-7, p8(NIED)
      p9, p10, p11(GSI),

1.3 Others
(1) Earthquake in Fuji Five Lakes, eastern Yamanashi Prefecture.(Dec. 3)
      p12 (JMA)
(2) Earthquake in the waters near Chichijima.(Jan. 4)
      p13 (JMA)
(3) Seismic activity in Noto region, Ishikawa Prefecture.
      p14 (JMA)
      p15-16 (GSI)
(4) Earthquake in Kii Channel.(Dec. 3)
      p17 (JMA)
(5) Seismic activity in the waters near Tokara Islands.
      p18-20 (JMA)
(6) Earthquake in Hyuganada sea.(Jan. 22)
      p21-22 (JMA)
      p23-24 (GSI)



• Intensive discussion "Current understanding of slow earthquakes".

      p26 Convener: Kazushige OBARA (ERI, Earthquake Research Institute, The University of Tokyo)

-Current understanding on slow earthquake activity from viewpoints of systematics and diversity
      p28 Kazushige OBARA (ERI)
-Geophysical environment for slow earthquakes: structures around the plate interface and fluid distribution
      p29 Kimihiro Mochizuki (ERI)
-Geological fingerprints of slow earthquakes
      p30 Kohtaro UJIIE (University of Tsukuba)
-Generation and evolution of precursory slow slip and foreshocks elucidated by large-scale rock friction experiments
    p31 Futoshi YAMASHITA (NIED, National Research Institute for Earth Science and Disaster Resilience)

• Purport of next intensive discussion subject "Crustal activities of the Sea of Japan region off Northeast Japan".

p32 Convener: Tatsuya ISHIYAMA (ERI, Earthquake Research Institute, The University of Tokyo)

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