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.

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, June 16, 2023  13:30～(JST)

　　　　Place:  Web Meeting (Zoom)

* 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: A simple method to evaluate the uncertainty of magnetotelluric forward modeling for practical three‑dimensional conductivity

AUTHOR: *Kiyoshi BABA

SUMMARY: I propose a method to evaluate the uncertainty in the foward modeling of magnetotelluric responses to a practical three-dimensional conductivity structure model in terms of random error because of the arbitral selection of horizontal coordinate system.

2. 13:45-14:00

TITLE: On the Development of Shear Surface Roughness

AUTHOR: *Manaska MUKHOPADHYAY, Uddalak BISWAS(Indian Institute of Engineering Science and Technology, Shibpur), Nibir MANDAL (Jadavpur University, Kolkata) and Santanu MISRA (Indian Institute of Technlogy, Kanpur)

SUMMARY: We investigated a unique type of slickenside, studied the shear surface roughness from field as well as laboratory experiments using fractal dimensional analysis and proposed a possible mechanism for its formation using basic numerical simulations.

3. 14:00-14:15

TITLE: Compilation of Historical Materials on Earthquake and Volcanic Eruption and Detection of Seismicity in the Premodern Period

AUTHOR: *Yasuyuki KANO･Hiroshi TSURUOKA･Fukashi MAENO･ Junzo OHMURA, Masaharu EBARA and Reiko SUGIMORI (Historiographical Institute)

*Speaker