Japan Geoscience Union Meeting 2023

Presentation information

[E] Oral

M (Multidisciplinary and Interdisciplinary) » M-IS Intersection

[M-IS04] Interdisciplinary studies on pre-earthquake processes

Sun. May 21, 2023 9:00 AM - 10:15 AM 104 (International Conference Hall, Makuhari Messe)

convener:Katsumi Hattori(Department of Earth Sciences, Graduate School of Science, Chiba University), Jann-Yenq LIU(Center for Astronautical Physics and Engineering, National Central University, Taiwan), Dimitar Ouzounov(Center of Excellence in Earth Systems Modeling & Observations (CEESMO) , Schmid College of Science & Technology Chapman University, Orange, California, USA), Qinghua Huang(Peking University), Chairperson:Katsumi Hattori(Department of Earth Sciences, Graduate School of Science, Chiba University), Dimitar Ouzounov(Center of Excellence in Earth Systems Modeling & Observations (CEESMO) , Schmid College of Science & Technology Chapman University, Orange, California, USA)

9:00 AM - 9:15 AM

[MIS04-01] Looking back on Professor Seiya Uyeda's 40 years of dedication to short-term earthquake prediction research -Encounter with the VAN method -

★Invited Papers

*Toshiyasu Nagao1 (1.Institute of Oceanic Research and development, Tokai University)

Keywords:Seiya Uyeda, EMSEV, VAN

EMSEV's first chairperson, Professor Seiya Uyeda passed away on January 19, 2023, at the age of 93.
Professor Uyeda has been active in this field since the early days of plate tectonics theory. One of his representative achievements is the paper proving that most of the driving force behind plate movement is the force of the slab pull (Forsyth and Uyeda, 1975). Furthermore, he advocated the theory of comparative subductology, and gave a certain degree of proof that there are trenches that are prone to large earthquakes and trenches that are not (Uyeda, 1882).
Professor Uyeda worked for many years as a professor at the Earthquake Research Institute of the University of Tokyo, but in his later years, he came across the Greek VAN earthquake prediction method. At the time, Professor Uyeda was editor-in-chief of the Tectonophysics, when he noticed that there was a VAN group paper that had been pending for two years. The reason for pending was "the result is too good".
Therefore, Professor Uyeda visited Greece, discussed it in detail with the first author, Professor P. Varotsos, and decided to publish this paper. This paper was the first paper on the VAN method (Varotsos and Alexopoulos,1984). In the lecture, I would like to introduce Professor Uyeda's achievements in this field, and why he came to think that short-term predictions were important.

References
Forsyth, D. and S. Uyeda, On the Relative Importance of the Driving Forces of Plate Motion, Geophysical Journal International, Volume 43, Issue 1, October 1975, Pages 163-200, https://doi.org/10.1111/j.1365-246X.1975.tb00631.x.
Uyeda, S., Subduction zones: An introduction to comparative subductology, Tectonophysics 81 133-159, 1982.
Varotsos, P. and K. Alexopoulos, Physical properties of the variations of the electric field of the earth preceding earthquakes, I, Tectonophysics, 110, 73-98, 1984.