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.

DANWAKAI has resumed in-person meeting in the Seiminar Room in September with live-streaming vir Zoom. If you would like to attend the Zoom session, please pre-register using the form below by September 17, 2026, 12:00pm.　

URL: https://forms.gle/BBFWpLzRr1ipBqRZA

The zoom URL and password will be announced on the day of the event to registered participants .

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, September 18, 2026  13:30～(JST)

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

　　　　　　　　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.

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1. 13:30-13:45

TITLE: Construction of the large-scale groundwater Cherenkov detector Hyper-Kamiokande

AUTHOR: *Yasuhiro NISHIMURA(Keio University) and Akimichi TAKETA

SUMMARY: In particle and cosmic ray physics, construction is underway on Hyper-Kamiokande, a detector that will significantly improve the sensitivity of neutrino observation and proton decay searches by using 260,000 tons of water at a depth of 600 meters underground. With the detector’s construction approaching in 2027, this report will cover the current status of construction, the detector construction plan, and the prospects for future observations.

2. 13:45-14:00

TITLE: Unexpected Aseismic Slip Transients on the Historically Quiescent Elsinore Fault Zone

AUTHOR: *Xinrong HOU･Aitaro KATO･Toshihiro IGARASHI,  Zhenwei GUO（Central South University）and Dawei GAO（Institute of Oceanology, Chinese Academy of Sciences）

SUMMARY: Using a high-resolution relocated earthquake catalog, we identify previously unresolved, near-synchronous aseismic-slip transients on both flanks of the low-b-value region that hosted the 2025 Mw 5.2 earthquake on the historically quiescent Elsinore Fault Zone.

3. 14:00-14:15

TITLE: Seismic Uplift of Submarine Calderas by Trapdoor Faulting─Atypical in Earthquakes and Tsunamis, but Common in Volcanic Calderas─

AUTHOR: *Osamu SANDANBATA

SUMMARY: Based on a Japanese review article published in Zisin (Journal of the Seismological Society of Japan) (DOI: 10.4294/zisin.2025-12), I review a series of studies on trapdoor faulting at submarine calderas.

*Speaker