Keisuke YOSHIDA

• Associate Professor, Graduate School of Science, Tohoku University
• Research interests: earthquake generation, recurrence, and seismicity patterns in relation to the spatiotemporal evolution of crustal stress and fault strength
• E-mail:
• ORCID: https://orcid.org/0000-0002-1058-9811

Hi, I'm Keisuke Yoshida, an associate professor at Tohoku University, Japan.
I am interested in understanding earthquake occurrence, source properties, and seismicity patterns in relation to the spatiotemporal evolution of stress and strength. This is a challenging topic, as it is currently not possible to estimate the absolute stress at depth from seismological or geodetic data. To address this, I have been attempting to extract information on the evolution of stress and strength by combining data analysis with elastic theory, and to explore its relationship with earthquake generation.

Many of the results obtained through these analyses are available via the data page, and I hope they will be of use to others.

Recent Publications

• Yoshida, K., 2026, Evolution of Coupled Seismic-Aseismic Slip During the 2025 Mw 6.8 Sanriku-Oki, Japan, Megathrust Sequence, Geophysical Research Letters.
• Yoshida, K., M. Uno, D. Bassett, 2026, The 2025 Mw 7.6 Aomori-Oki Megathrust Sequence and a Slip-Parallel Seismic Belt to the Trench, Geophysical Research Letters, 53, e2026GL122361, https://doi.org/10.1029/2026GL122361

Related Datasets

• Yoshida, K., M. Uno, D. Bassett, 2026, Data for the 2025 Mw 7.6 Aomori-Oki, Japan, Earthquake Sequence: Relocated Hypocenters and Rupture Models, Zenodo. https://doi.org/10.5281/zenodo.19963531
• Yoshida, K., 2026, Data for the 2025 Mw 6.8 and Mw 6.4 Sanriku-Oki, Japan, Earthquakes: Relocated Hypocenters, Rupture Models, and Strainmeter Data, Zenodo. https://doi.org/10.5281/zenodo.19383821

Special Issue

I am serving as a guest editor for the Earth, Planets and Space special issue The 2025 Mw7.6 Off-Aomori Earthquake and Recent Megathrust Processes in the Japanese Subduction Zones. The collection is open for submissions, with a submission deadline of 31 March 2027.

Research Interests

• Earthquake cycles: earthquake repetition, energy radiation, stress drop, rupture patterns including directivity, complexity, and slip evolution, and source time functions across a wide magnitude range (papers).
• Stress fields and earthquake occurrence: causes, absolute values, and evolution of stress fields during earthquake cycles (papers).
• Fluid processes and earthquake occurrence: swarm activity and large earthquakes, fluid migration after the 2011 M9 Tohoku earthquake, and the 2024 Noto Peninsula earthquake (papers).
• Earthquake generation processes in Japan (papers).

Updated on June 10, 2026