Abstract of the 224th meeting of CCEP

  The 224th meeting of the Coordinating Committee for Earthquake Prediction (CCEP) was held at the Kanto Regional Survey Department of the GSI on Aug. 30, 2019. Firstly, nationwide monitoring data of the seismic activity and the crustal deformaitons were reported. Secondary, the CCEP members discussed the intensive discussion subject "Rheology and seismic activity in the crust and upper mantle beneath the Japanese Islands". Finally, the purport of next intensive discussion subject "Trial of experimental earthquake forecast Part 6" was explained.

• Deliberation about crusutal activity monitoring.

1.General crustal activities
（1）Seismic activities of Japan.
     p3 (JMA)
（2）Activity of shallow very low frequency earthquakes around Japan.
     pp4-5 (NIED)
（3）Strain changes in the Japanese Islands.
     p6 (GSI)

1.2 Stuck state of plate boundary and its change.
（1)Suruga trough, Nankai trough and Nansei shoto trench.
     pp7-11 (NIED)
     p12 (GSI)
     pp13-14 (GSI)

1.3 Others.
（1)Earthquake in off the coast of Yamagata Pref.(Jun. 18, 2019 M6.7)
     pp15-21 (JMA)
     pp22-23 (ERI)
     pp24-25 (GSI)
（2)Earthquake in off the coast of Fukushima Pref. (Aug. 4, 2019 M6.4)
     p26 (JMA)
（3)Earthquake under the Boso Peninsula area.
     pp27-28 (ERI,Chiba University)
（4)Earthquake in Central California,USA(Jul. 6, 2019 Mw7.0 ;2019 Ridgecrest earthquake)
     p29 (JMA)
     p30 (GSI)


• Intensive discussion " Rheology and seismic activity in the crust and upper mantle beneath the Japanese Islands"

      p32 Convener: Toru MATSUZAWA (Tohoku University)
      Heterogeneity in stress field in NE Japan and its implication for the fault strength and the earthquake occurrence mechanism
     　p34 Keisuke YOSHIDA (Tohoku University)
      Long-term uplift-denudation of island arc mountains revealed by low-temperature thermochronology
     　p35 Takahiro TAGAMI (Kyoto University)
      Formation of Island Arc-Trench System due to Steady Plate Subduction
     　p36 Yukitoshi FUKAHATA (Kyoto University)
      Mechanism of interseismic subsidence of the Northeast Japan forearc during the late period of a gigantic earthquake cycle
     　p37 Bunichiro SHIBAZAKI (Building Research Institute)

• Purport of next intensive discussion subject " Trial of experimental earthquake forecast Part 6".

     　p38 Convener: Yoshihiko OGATA（The Institute of Statistical Mathematics)

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