[H-DS05] 地すべりおよび関連現象

[HDS05-12] Detection of seismic waves excited from intermediate-scale landslides

★Invited Papers

*土井 一生¹、王 功輝¹、釜井 俊孝¹ (1.京都大学防災研究所)

Detection of seismic waves from large-scale landslides (> 10⁶ m³) such as deep-seated ones by Japanese routine seismic observation network have been reported (Yamada et al., 2012, Doi and Maeda, 2020). For utilization of automated landslide detection by the routine seismic observation network, it is necessary to grasp how large landslides can be captured and whether the seismic sources are well constrained. This study focused on several intermediate-scale landslides (with a volume of around 10⁴ m³) which took place during 2018-2022. Field surveys (e.g. Doi, 2023) were conducted for some of the landslides in order to grasp the landslide configuration and mechanisms. We compared these results with the amplitudes and dominant frequencies of the seismic waves, and epicentral distances to interpret the detectability of the intermediate-scale landslides.

Acknowledgements: We used seismic waveform data provided by Hi-net (NIED, 2019) and JMA. This research was supported by Japanese KAKENHI JP21K18792.