The 934th DANWAKAI(program)

All members concerned


                                                   Earthquake Research Institute


                                                           The University of Tokyo


                                                                              Director


                                                                  Takehiro  Koyaguchi


 


              Announcement of the 934th 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,16 January 13:30-


Place:ERI Bldg.2, 5th floor, Conference room1


 


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


 


1.13:30-13:45


ERI Monitoring system for seismic activity in Japan


*Kazushige Obara, Takuto Maeda


 


2.13:45-14:00


Earth′s Strain Observations with a 100 m Absolute Distance Meter


in Kamioka Mine


*Akiteru TAKAMORI, Akito ARAYA, Wataru MORII (DPRI, Kyoto University),


 Souichi TELADA (AIST), Takashi UCHIYAMA, and Masatake OHASHI


(ICRR, University of Tokyo)


Summary:


The achievements and instrumentation of a 100 m absolute distance


meter (ADM) built in the Kamioka underground site will be reviewed.


 


3.14:00-14:15


Spectrometry of the Earth using neutrino oscillation


*Akimichi Taketa, Carsten Rott(Sungkyunkwan University)


 


4.14:15-14:30


Temperature, grain size, and chemical controls on polycrystal anelasticity


over a broad frequency range extending into the seismic range


*Yasuko Takei, Fumiya Karasawa, and Hatsuki Yamauchi


Summary:


Polycrystal anelasticity at near-solidus temperatures becomes important


for the quantitative interpretation of upper mantle seismic structures.


 


5.14:30-14:45


Southern extent of the 2011 Tohoku earthquake constrained by seismicity


*Yukihiro NAKATANI, Kimihiro MOCHIZUKI, Masanao SHINOHARA, Tomoaki YAMADA,


Ryota HINO (Tohoku University), Yoshihiro ITO (Disaster Prevention


Research Institute, Kyoto University), Yoshio MURAI (Hokkaido University),


Toshinori SATO (Chiba University)


Summary:


We investigated seismicity before and after the 2011 Tohoku earthquake


around off Ibaraki using dense ocean-bottom seismic array data.


On the basis of the results, we discuss the southern extent of


the main shock.


 


6.14:45-15:00


Urgent seismic observation of Northern Nagano Prefecture earthquake


* Shin’ichi Sakai, Eiji Kurashimo, Kazushige Obara, Takaya Iwasaki,


Hiroaki Takahashi(Hokkaido University), Satoshi Matsumoto, Megumi Kamizono


(Kyushu University), and Tomomi Okada(Tohoku University)


Summary:


Two days before the main shock, we had started installing temporary


seismic stations in order to reveal a relationship of the active fault


and the seismicity.


 


 


*Speaker