The 989th DANWAKAI(program)Announcement of the 989th 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, 17 January 13:30-
Place: ERI Bldg.2, 5th floor, Conference Room1
TITLE: The 2019 landing survey and sequence of volcanic activity
AUTHOR: *Fukashi MAENO, Mitsuhiro YOSHIMOTO(Mount Fuji Research Institute),
Takao OHMINATO･Atsushi WATANABE･Takayuki KANEKO･Atsushi YASUDA
and Natsumi HOKANISHI
SUMMARY: We report the landing survey at Nishinoshima conducted in September 2019
and the new findings obtained there. The activities from 2013 to the present
is also reviewed.
TITLE: Ionospheric disturbance made by the Kchinoerabujima eruption
on 25th May, 2015 【Final report of project research】
AUTHOR: *NAKASHIMA, Y., K. NISHIDA, Y. AOKI and K. HEKI(Hokkaido University)
SUMMARY: I'll report results obtained in this two years.
TITLE: Distributed Acoustic Sensing measurements by using seafloor optical
fiber cable system off Sanriku for seismic monitoring
AUTHOR: *Masanao SHINOHARA, Tomoaki YAMADA, Takeshi AKUHARA,
Kimihiro MOCHIZUKI and Shin'ichi SAKAI
SUMMARY: Many earthquakes including micro-earthquakes were recorded by
DAS measurements using a dark fiber of Sanriku seafloor observation system.
TITLE: Relationship between heterogeneous crustal structure offshore Ibaraki
and various types of seismicity
AUTHOR: *Kimihiro MOCHIZUKI･Tomoaki YAMADA･Masanao SHINOHARA, Ryota HINO･
Ryosuke AZUMA (Tohoku University), Yoshihiro ITO (DPRI, Kyoto University),
Yoshio MURAI (Hokkaido University), Kenji UEHIRA (NIED)
and Toshinori SATO (Chiba University)
SUMMARY: Subducted seamount is imaged using OBS active-source records and
relationship with various types of seismicity including recently identified
tremors is discussed.