The 1012th DANWAKAI(program)

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

Date:  Friday March 18  13:30-

Place:  Web Meeting (Zoom)

*URL and password will be provided by internal e-mail on February 18.


1.        13:30-13:45

TITLE: Feasibility study for ultra-high resolution seismic profiling using broadband vibrator across active faults

AUTHOR: *Tatsuya ISHIYAMA, Hiroshi SATO (Shizuoka Univ.), Naoko KATO (Nihon Univ.), Hideo SAITO and Susumu ABE (JGI, Inc.)

SUMMARY: We show results of feasibility study of ultra-high resolution seismic reflection profiling with broadband vibrator and discuss its applicability to subsurface imaging of active faults.

2.        13:45-14:00

TITLE: Migration-based event location for local earthquakes recorded in Ocean Bottom Seismometers (OBSs).


SUMMARY: We will introduce the time pick-free event location method for OBS records.

3.        14:00-14:15

TITLE: Convolutional Neural Network to Detect Deep Low-Frequency Tremors from Past Seismogram Images

AUTHOR: Ryosuke KANEKO, *Hiromichi NAGAO, Shin-ichi ITO, Hiroshi TSURUOKA

and Kazushige OBARA

SUMMARY: We applied a convolutional neural network to extract tremors recorded in the past seismogram images of the Kumano observatory from 1966 to 1977.


4.  14:15-14:30

TITLE: Report on electromagnetic survey in Izu-oshima

AUTHOR: *Takao KOYAMA・Kiyoshi BABA, Noriko Tada (JAMSTEC), Yoshiya USUI

and Makoto UYESHIMA

SUMMARY: Report on installation of the electro-magnetometers on land and sea-bottom of Izu-Oshima volcano.