[H-TT15] Geographic Information Systems and Cartography

[HTT15-P04] Analyzing the distribution of landslides and their correlation with active fault characteristics induced by the 2024 Noto Peninsula Earthquake in Japan

★Invited Papers

*Chi-Wen Chen^1,2, Ryuji Yamada³, Tomoyuki Iida² (1.Department of Geosciences, National Taiwan University, 2.Center for Spatial Information Science, The University of Tokyo, 3.National Research Institute for Earth Science and Disaster Resilience)

Keywords:Landslide, Earthquake, Active fault, Topography

Earthquake-induced landslides are a significant hazard in seismically active regions, with the potential to cause substantial damage and casualties. The impacts of earthquake-induced landslides are not limited to the immediate aftermath of the seismic event, as they can have long-term consequences, including the potential for subsequent debris flows. Therefore, understanding the spatial distribution and characteristics of earthquake-induced landslides is crucial for effective hazard assessment and emergency response planning. On January 1, 2024, at 16:10 (JST), a seismic event of magnitude 7.6 occurred in the Noto Peninsula of Ishikawa Prefecture, Japan, with a focal depth of approximately 16 kilometers. This earthquake, attaining a maximum Japan Meteorological Agency (JMA) seismic intensity of 7, resulted in the confirmation of approximately 236 fatalities. The seismic activities, including this event and the series of earthquakes since December 2020, have been known as the 2024 Noto Peninsula Earthquake. It is known that along the northern coastal region of the Noto Peninsula, there is a distribution of subsea active faults associated with reverse faults inclined towards the southeast. The possibility of this earthquake being a manifestation of activity along these faults has been suggested. The Geospatial Information Authority of Japan (GSI) has released seismic source fault models and landslide distribution data related to this earthquake. In this study, we analyze the distribution characteristics of slope collapses triggered by the 2024 Noto Peninsula Earthquake and discuss their correlation with the characteristics of the active fault.