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
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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