I am Takahiko (Taka) Uchide, an earthquake seismologist. I aim to understand the physical mechanisms of earthquake generation from the stress loading on and around faults to the dynamic rupture evolution. My approach so far is the data analysis (including deep learning) using seismograms and earthquake catalogs to capture the reality of seismic processes. I am trying to extract information inferred from data as much as possible, and as robust as possible.
For those who are interested in collaborations, technical consulting (for companies), or being hosted as a postdoc, a research assistant (for graduate students), or a technical trainee (for graduate and undergraduate students), please find more details here.
Taka earned his Ph.D. at the University of Tokyo, Japan. After postdoctoral researcher positions at University of California, San Diego, USA, and Kyoto University, Japan, he worked as a Researcher, Senior Researcher, and Chief Senior Researcher at Geological Survey of Japan, AIST, and Planning Officer at Research Strategy Planning Department, AIST. Currently he is serving as a Group Leader at Geological Survey of Japan, AIST. In the Seismological Society of Japan, he served as a Board Member, Chief Editor of the Editorial Board of the Newsletter, and Chair of the Seismology Summer School 2020. He was awarded Young Scientist Award of the Seismological Society of Japan in 2014.
A co-authored paper (Sagae et al., 2025) was pubished by Journal of Geophysical Research: Solid Earth. The press release (in Japanese) was issued from AIST. The first author, Kodai Sagae, is an AIST Postdoctoral Researcher working with me. (Jun. 4, 2025)
We published the Introduction of BSSA Special Issue "Improving Measurements of Earthquake Source Parameters" (Baltay et al., 2025). (May 4, 2025)
We published two packages of computer codes from GSJ Open-File (Sawaki et al., 2025; Sagae et al., 2025). (May 4, 2025)
I start serving as a Group Leader of Seismotectonics Reserch Group, IEVG, GSJ, AIST. (Apr. 1, 2025)
Dr. Yasunori Sawaki moved to Ritsumeikan University as an Assistant Professor. (Apr. 1, 2025)
We received AIST President Award. (Mar. 31, 2025)
A co-authored paper (Sawaki et al., 2025) was accepted by Journal of Geophysical Research: Solid Earth. The first author, Yasunori Sawaki, is an AIST Postdoctoral Researcher working with me. (Mar. 20, 2025)
A co-authored paper (Sugii et al., 2024) was published in Earth, Planets, and Space. The first author, Amane Sugii, was working at GSJ with me as an AIST Technical Trainee. (Dec. 28, 2024)
I moved (back) to Geological Survey of Japan, AIST. (Oct. 1, 2024)
Two co-authored papers (Shiina et al., 2024; Darisma et al., 2024) are out. (July 22, 2024)
Dr. Admore P. Mpuang arrived as AIST Postdoctoral Researcher. (Apr. 1, 2024)
We published the Call for Papers "Special Issue on Improving Measurements of Earthquake Source Parameters" in Bulletin of the Seismological Society of America. (Dec. 6, 2023)
I moved to Research Strategy Planning Office, AIST. (Oct. 1, 2023)
Dr. Yuta Amezawa moved to Tokyo Institute of Technology as an Assistant Professor. (Sep. 1, 2023)
An online article of "AIST Magazine" for the outreach of our study on the stress map was published (in Japanese). (Jul. 11, 2023)
Dr. Yasunori Sawaki arrived as AIST Postdoctoral Researcher. (Apr. 1, 2023)
An article was published in the newspaper, Nikkan Kogyo Shimbun (in Japanese), on Dec. 22, 2022. (Feb. 9, 2023)
I will give a talk at the 61st AI Seminar (in Japanese) hosted by AIRC, AIST on Dec. 22, 2022. (Dec. 19, 2022)
We have one open postdoc position for the MEXT STAR-E Project at Geological Survey of Japan, AIST. (Nov. 12, 2022)(Dec. 19, 2022)
Do not contact me directly about this job opportunity. You can find the contact e-mail address in the application guideline.
An article published in HERP News to introduce the Japan stress map (in Japanese). (Oct. 13, 2022)
I gave an intensive lecture at Shizuoka University, Japan on Sep. 28-29. (Oct 1, 2022)
Co-authored paper (Pennington et al., 2022) was highlighted by an article in the EOS of AGU (doi: 10.1029/2022EO220297). (Jun. 30, 2022)
A paper accepted in JGR Solid Earth (Jun. 14, 2022):
Uchide, T., T. Shiina, and K. Imanishi (2022), Stress map of Japan: Detailed nationwide crustal stress field inferred from focal mechanism solutions of numerous microearthquakes, J. Geophys. Res. Solid Earth, 127, e2022JB024036. doi:10.1029/2022JB024036.
Stress data and focal mechanism solutions are available at GSJ OpenFile No.738.
I will give a lecture at the 42nd "Suuri-no-Tsubasa" Summer Seminar (for high school students; in Japanese) on August 7-12, 2022. (Apr. 27, 2022)
Drs. Yuta Amezawa and Kodai Sagae arrived as AIST Postdoctoral Researcher. (Apr. 1, 2022)
I gave a talk in the Top Lectures of the Japan Earth Science Olympiad. (Mar. 13, 2022)
I will give a talk at the symposium "Crustal Stress in Japan - Japan Stress Map (JSM)" by JSCE Energy Committee on Mar. 7, 2022 (in Japanese). (Feb. 17, 2022)
I will give a talk on our STAR-E research subject in the 1st Research Forum of the MEXT STAR-E Project on Feb. 18, 2022 (in Japanese). (Feb. 17, 2022)
We introduce our research subject in the MEXT STAR-E Project on its website (in Japanese). (Feb. 17, 2022)
We have two open postdoc positions at Geological Survey of Japan, AIST. (Oct. 8, 2021) (Updated on Dec. 14, 2021)
Postdoctoral Researcher for the MEXT STAR-E Project [link]
Postdoctoral Researcher for "Science of Slow-to-Fast Earthquakes" Project [link]
The research proposal "Science for Slow-to-Fast Earthquakes" has been accepted for the KAKENHI Grant-in-Aid for Transformative Research Areas(A). TU joins this project as a collaborator in the group B02. (Sep. 10, 2021)
Our research proposal has been accepted for the MEXT STAR-E Project (Jun. 18, 2021)
Introduced in SSA "At Work" column (Dec. 16, 2020): https://www.seismosoc.org/news/at-work-takahiko-uchide/
A paper published in GJI (Aug. 26, 2020):
Uchide, T. (2020), Focal mechanisms of small earthquakes beneath the Japanese islands based on first-motion polarities picked using deep learning, Geophys. J. Int., 223, 1658–1671, doi:10.1093/gji/ggaa401.
An article published in Naifuru of SSJ (written in Japanese) (Aug. 1, 2020): https://www.zisin.jp/publications/pdf/nf-vol122.pdf