The 1043rd DANWAKAI(program)

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.

Please refrain from secondary distribution of the URL to be provided. Due to copyright issues, recording of the video and audio distributed is strictly prohibited.

    Date:  Friday, January17, 2025  13:30~(JST)

    Place: ERI Bldg.1, 2nd floor, Seminar Room1

       Livestream Zoom Webinar

* The zoom URL and password required for participation will be provided on the day of the event to those who wish to attend.


1. 13:30-13:45

TITLE: Segmented trapdoor fault in Kita-Ioto Submarine Caldera revealed with millimeter tsunami waveform record

AUTHOR: *Osamu SANDANBATA and Tatsuhiko SAITO (National Research Institute for Earth Science and Disaster Resilience)

SUMMARY: We detected 1–2 mm amplitude tsunami waves at DONET caused by two M~5 earthquakes near the Kita-Ioto Submarine Caldera, with which we revealed that rapid submarine caldera uplift repeatedly occurred due to trapdoor faulting that ruptured different intra-caldera fault segments; this work has been published in JGR Solid Earth (https://doi.org/10.1029/2024JB029755; see the summary at ERI’s website: https://www.eri.u-tokyo.ac.jp/en/research/6579/).

2. 13:45-14:00

TITLE: Emergence of self-organized criticality and phase transition in the Olami-Feder-Christensen earthquake model with a single defect

AUTHOR: *Tetsuto OTANI and Nobuki KAME

SUMMARY: We report on the conditions for the emergence of the Gutenberg-Richter law in a discrete earthquake model and newly discovered phase transitions; this work has been published in Physical Review E (https://link.aps.org/doi/10.1103/PhysRevE.110.054129).

3. 14:00-14:15

TITLE: Muon observation in the Ishido fault borehole

AUTHOR: * Akimichi TAKETA, Katsuya YAMAZAKI (Chubu University), Takayuki TOMIDA (Shinshu University) and Daisuke IKEDA (Kanagawa University)

SUMMARY: Report about the current status of muon observation in the Ishido fault borehole

*Speaker