The 939th DANWAKAI(program)

All members concerned
                                                  Earthquake Research Institute
                                                              The University of Tokyo
                                                                     Kazushige Obara


              Announcement of the 939th DANWAKAI

(Danwakai: ERI Holds ”Danwakai”, a monthly meeting where its members
present their most recent academic and technical achievements, on a
Friday of every month. Danwakai is open to the public.)

Date:Friday,19 June 13:30-
Place:ERI Bldg.2, 5th floor, Conference room1


Historical tsunami and storm deposits during the last five centuries on the Sanriku coast, Japan by tsunami-deposit survey
* Tomoko Goto・Kenji Satake・Toshihiko Sugai・Takeo Ishibe・Tomoya Harada・Satoko Murotani
Nine event deposits in a small alluvial valley along the Sanriku coast, Japan, were correlated with historical tsunamis and storms that have been recorded in this region since the 15th century.

Tsunamis from the 29 March and 5 May 2015 Papua New Guinea earthquake doublet (Mw 7.5 ) and tsunamigenic potential of the New Britain trench
* Mohammad Heidarzadeh*, Aditya Riadi Gusman, Tomoya Harada, and Kenji Satake
We characterized tsunamis from the 29 March and 5 May 2015 Kokopo, Papua New Guinea Mw 7.5 earthquake doublet by applying teleseismic body-wave inversion and tsunami simulation.

Seismological and electromagnetic observation on the seafloor and islands of the Ontong Java Plateau
* Daisuke Suetsugu・Hiroko Sugioka・Aki Ito・Noriko Tada・Hiroshi Ichihara・Yasushi Ishihara・Masayuki Obayashi・Takashi Tonegawa・Seiichi Miura (Japan Agency for Marine-Earth Science and Technology), Shoka Shimizu・Masao Nakanishi (Chiba University), Takehi Isse・Kiyoshi Baba・Hajime Shiobara・Hisashi Utada
We show details and purposes of on-going seismological and electromagnetic observation with BBOBS and OBEM on the seafloor and islands of the Ontong Java Plateau.

Estimating Extent, Duration, and Magnitude of Large Earthquakes via Real Time Hi-net Data
* Dun Wang・Hitoshi Kawakatsu
We developed an automated system for tracking rupture migration of large earthquakes and issuing the results in real time.

Mechanism for the b-value change: insight from model studies
* Takahiro Hatano, Tetsuya Mitsudo (kyoto Univ), Naoyuki Kato
A possible mechanism for the b-value decrease prior to large earthquakes is discussed from the physical point of view.