Abstract of the 230th meeting of CCEP

  The 230th meeting of the Coordinating Committee for Earthquake Prediction (CCEP) was held at the web confrence of GSI on Feb. 26, 2021. Firstly, the nationwide monitoring data of the seismic activity and the crustal deformaitons were reported. Secondary, the CCEP members discussed the intensive discussion subject "Ten years after the Tohoku-oki earthquake: What has happened and what we have learned in the past ten years". Finally, the purport of next intensive discussion subject "Improvements of earthquake and tsunami early warnings: Ten years after the 2011 Tohoku earthquake" was explained.
※The materials on this site are written in Japanese.

• Deliberation about crusutal 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 Stuck state of plate boundary and its change.
(1) Suruga trough, Nankai trough and Nansei islands trench.
      pp5-7 , p12 (NIED)
      pp8-11, p19 , p20, p21 (GSI)
      pp13-15 (ERI,NIED)
      pp16-18 (JAMSTEC)

1.3 Others
(1) Earthquake eastward offshore of Aomori Prefecture.(Dec 21)
      p22 (JMA)
(2) Earthquake in off the coast of Fukushima Prefecture.(Feb 13)
      p23 (JMA)
      pp24-25 (GSI)
(3) Earthquake activity near the border of Nagano, Gifu and Fukui prefectures.
      p26 (ISM)



• Intensive discussion "Ten years after the Tohoku-oki earthquake: What has happened and what we have learned in the past ten years"

      p28 Convener: Toru MATSUZAWA (Tohoku University)

-Feature of recent seismic activity in off the Pacific coast of Tohoku.
      p30 Katsuhiko SHIOMI (NIED, National Research Institute for Earth Science and Disaster Resilience)
-Tohoku-oki earthquake 10-year after: what we have learned and what we still do not understand
      p31 Shuichi KODAIRA (JAMASTEC, Japan Agency for Marine-Earth Science and Technology)
-Crustal deformation prior to and following the 2011 Tohoku-oki earthquake inferred from geodetic observation on land
      p32 Yuki KUROISHI (GSI, Geospatial Information Authority of Japan)
-Seafloor geodetic observations associated with the 2011 Tohoku-oki earthquake and their applications
      p33 Fumiaki TOMITA (JAMASTEC, Japan Agency for Marine-Earth Science and Technology)
-Development in modeling Tohoku-oki megathrust earthquake cycles and the associated crustal deformation processes
      p34 Bunichiro SHIBASAKI (Building Research Institute)

• Purport of next intensive discussion subject "Improvements of earthquake and tsunami early warnings: Ten years after the 2011 Tohoku earthquake"

      p35 Convener: Mitsuyuki HOSHIBA (MRI, Meteorological Research Institute)

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