Japan Geoscience Union Meeting 2025

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[J] Oral

H (Human Geosciences ) » H-DS Disaster geosciences

[H-DS11] Human environment and disaster risk

Sun. May 25, 2025 9:00 AM - 10:30 AM 104 (International Conference Hall, Makuhari Messe)

convener:Hiroshi, P. Sato(College of Humanities and Sciences, Nihon University), Shintaro Yamasaki(Disaster Prevention Research Institute, Kyoto University), Michinori Hatayama(Disaster Prevention Research Institute, Kyoto University), Takayuki Nakano(Geospatial Information Authority of Japan), Chairperson:Shintaro Yamasaki(Disaster Prevention Research Institute, Kyoto University)


9:15 AM - 9:30 AM

[HDS11-01] Continuity of landslide surface deformation detected by ALOS-2 InSAR images around Osh City, Kyrgyz Republic

*Hiroshi, P. Sato1 (1.College of Humanities and Sciences, Nihon University)

Keywords:landslide, Kyrgyz, satellite, Pléiades, ALOS-2

Time-series InSAR images were produced from ALOS-2 data, observed for 8 years, between 2015 and 2023, and landslide surface displacements were detected in and around 73º21´E, 40º33´N. Small landslides, whose displacement was not temporally continuous, was sporadically detected in the area. It was found that some of the large landslides stay in displacement. To observe the landslide displacement in detail, the area 119 km2 was selected from the Pléiades Neo satellite image coverage area taken in August 2024, where landslides occurred frequently. Furthermore, the 38 km2, which is included in the 119 km2, was selected from the Pléiades satellite image coverage area taken in October 2017 and in June 2021, where large landslides stay in displacement. Landslide distribution map will be presented by interpreting these satellite images and relation between the landslide distribution and the InSAR-measured displacement will be discussed. The ALOS-2 data used in this study were given by JAXA, through the support of ERI JURP 2024-B-02 in Earthquake Research Institute, the University of Tokyo. Purchasing of Pléiades and Pléiades Neo satellite images were supported by Special Research Project of Nihon Univ (FY 2024-2025).