Seminar – Earthquake Research Institute, the University of Tokyo

The 939th DANWAKAI(program)

All members concerned
                                                  Earthquake Research Institute
                                                              The University of Tokyo
                                                                       Director
                                                                   　　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

*****************************

1.13:30-13:45
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
SUMMARY:
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.

2.13:45-14:00
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
SUMMARY:
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.

3.14:00-14:15
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
SUMMARY:
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.

4.14:15-14:30
Estimating Extent, Duration, and Magnitude of Large Earthquakes via Real Time Hi-net Data
* Dun Wang・Hitoshi Kawakatsu
SUMMARY:
We developed an automated system for tracking rupture migration of large earthquakes and issuing the results in real time.

5.14:30-14:45
Mechanism for the b-value change: insight from model studies
* Takahiro Hatano, Tetsuya Mitsudo (kyoto Univ), Naoyuki Kato
SUMMARY:
A possible mechanism for the b-value decrease prior to large earthquakes is discussed from the physical point of view.

*Speaker