JP

Organization

Research Division

Risk Evaluation and Disaster Mitigation Research Division
Inland Earthquake and Volcano Lab
Research Fellow (Specially Appointed)
Ph.D. (Geophysics, Applied Mathematics)
Research Subject(s)
My research interest is to investigate the processes that lead to the evolution and generation of earthquakes and faults by using geodetic data sets. By focusing on the surface deformations obtained from geodetic observations such as GNSS and InSAR, I am trying to understand fault mechanics through modeling.
Key Words
Crustal Deformation / GNSS / SAR / InSAR / Deep Learning
Website
Research Activities

Interactions of aseismic and seismic slips of the Philippine Fault on Leyte Island revealed by InSAR and GNSS time-series
We investigate spatiotemporal variations in slip along the Philippine Fault (Leyte) from October 2006 to July 2023 using InSAR (ALOS/ALOS-2) and GNSS data. The 6 July 2017 earthquake produced clear coseismic and postseismic signals, followed by a notable increase in creep rates. Post-2017 surface creep reached 35–55 mm/yr, with significantly higher rates in the northern segment compared to pre-2013 estimates, indicating decadal variability. We also identify shallow slip deficits, one likely linked to a Mw 4.7 event in January 2023.
 

Selected Works

Okur, Y., Fukushima, Y., Ching, KE., Sharma, Y. (2025). Interactions of aseismic and seismic slips of the Philippine Fault on Leyte Island revealed by InSAR and GNSS time-series. Prog Earth Planet Sci 12, 93, doi:10.1186/s40645-025-00758-8

Okur, Y., Bulut, F., Garagon, A.(2024). Slip partitioning between subparallel strands of the North Anatolian Fault in the Marmara Region, Geophysical Journal International, Volume 236, Issue 1, Pages 349–361, doi:10.1093/gji/ggad433

Selected Memberships
  • The Geodetic Society of Japan
  • Japan Geoscience Union
  • American Geophysical Union