Abstract of the 220th meeting of CCEP

  The 220th meeting of the Coordinating Committee for Earthquake Prediction (CCEP) was held at the Kanto Regional Survey Department of the GSI on Aug 24, 2018. Firstly, nationwide monitoring data of the seismic activity and the crustal deformaitons were reported. Secondary, the CCEP members discussed the intensive discussion subject "Huge earthquake in Chishima Trench, off the east coast of Hokkaido and in Northern Sanriku". Finally, the purport of next intensive discussion subject "Trial of experimental earthquake forecast Part 5" was explained.

• Deliberation about crusutal activity monitoring.

1.General crusutal activities
（1）Seismic activities of Japan.
     p3 (JMA)
（2）Activity of shallow very low frequency earthquakes around Japan.
     p4 (NIED)
（3）Strain changes in the Japanese Islands.
     p5 (GSI)

1.2 The 2011 off the Pacific coast of Tohoku Earthquake.
     pp6-7 (GSI)
     pp8-9 (JCG)

1.3 Stuck state of plate boundary and its change.
（1)Sagami trough.
     pp10-11 (JMA)
     p12 (NIED)
     pp13-14 (GSI)
     p15 (GSI)
     p16 (JMA)
（2)Suruga trough, Nankai trough and Nansei shoto trench.
     p17 (JCG)
     pp18-19 (JCG)
     p20 (NIED)

1.4 Others.
（1)Earthquake in the northern Nagano Prefecture.(May 12)
     p21 (JMA)
（2)Earthquake in the northern Nagano Prefecture.(May 25)
     p22 (JMA)
（3)Earthquake in the northern Osaka prefecture.
     pp23-28 (JMA)
     p29 (DPRI,Kyoto Univ.)
     p30 (DPRI,Kyoto Univ.)
     p31 (GSI)


• Great earthquakes along southernmost Kuril Trench and northern Japan Trench p35 Convener: Kenji Satake (Earthquake Research Institute, the University of Tokyo)

     On "Long-term evaluation of earthquakes along Kuril Trench" by Earthquake Research Committee
     　p37 Kenji Satake (Earthquake Research Institute, the University of Tokyo)
     Recurrence history of giant earthquakes along Kuril Trench and northern Japan Trench
     　p38 Masanobu Shishikura (Geological Survey of Japan, AIST)
     Relative quiescence and the current status of the seismicity east off Hokkaido
     　p39 Ritsuko S. Matsu'ura (Association for the Development of Earthquake Prediction)
     Overview and earthquake detection capability of S-net (Seafloor observation Network for Earthquakes and Tsunamis along the Japan Trench)
     　p40 Kenji Uehira (NIED, National Research Institute for Earth Science and Disaster Resilience)
     Structure of the Japan Trench Seismogenic zone and its seismological implications
     　p41 Shuichi Kodaira (JAMASTEC, Japan Agency for Marine-Earth Science and Technology)

• Purport of next intensive discussion subject "Trial of experimental earthquake forecast Part 5 ".

     p42 (Convener: Tetsuo Hashimoto, JMA)

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