Jianghui Geng
Institute: Wuhan University
Title: Professor
Country/Region: China
Period: 2023/7/25-2023/8/26
Theme: Very early post-seismic deformation of large earthquake using kinematic GNSS
Host: Yosuke Aoki
Introduction: Jianghui Geng holds a Bachelor’s degree in Engineering Surveying and Space Geodesy from Wuhan University, China in 2004, and graduated with a Ph.D. degree in GPS Geodesy from Nottingham Geospatial Institute, the University of Nottingham, UK in January 2011 and later worked as an enterprise research fellow. In 2012, he joined Institution of Oceanography (SIO), USA and held a Green scholar position. Since 2015, he has been a full professor in GNSS Geodesy at Wuhan University. His major research interest is high-precision GNSS and its advanced application in geosciences.
Research Report:
Research Report
Earthquake Research Institute, the University of Tokyo

Jianghui Geng
GNSS Research Center, Wuhan University

General Description of Work:
I was a short-term visiting scholar to the Earthquake Research Institute (ERI), the University of Tokyo from July 24 to August 27, 2023 to collaborate with Prof. Yosuke Aoki on very early postseismic deformation of large earthquake using kinematic GNSS. During the visit, we discussed how to improve kinematic GNSS positioning precisions to recover slight motions after an earthquake or preceding a volcano eruption event, and especially, the role of multi-GNSS multipath mitigation in reducing noise of epoch-wise GNSS displacements. On August 10, we visited together to Geospatial Information Authority of Japan (GSI) in Tsukuba, and I gave a talk on the IGS activities at Wuhan University. We had a good talk with Dr. Hiroshi Munekane, Dr. Basara Miyahara, Dr. Yusaku Ohta, Dr. Kyohei Akiyama, et al. and they talked about the MADOCA software, the GSI GEONET as well as the application of high-precision GNSS in earthquake/tsunami early warning. On August 18, we talked to Prof. Akimichi Taketa on the GNSS time synchronization for Hyper-Kamiokande. On Friday seminars, I also talked to the speakers Philippe Lognonné, Vladimir Vukobratovic and Zefeng Li on the potential of GNSS and its combination with seismic sensors in studying structural vibrations and earthquake deformations.

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Fiscal Year: 2023