Characterization of Landslide geometry using Seismic Refraction Tomography in the GayoLues, Indonesia

Landslides are the most common geological phenomenon in Indonesia.The event is damage to public infrastructure, and fatalities was a big impact. Therefore, mapping geometry of landslides part mitigation effort possible by geophysical methods. In this research, we applied seismic refraction tomography (SRT) study sliding zone from landslide event.TheNational Disaster Management Authority reported that area frequently occurring disaster, i.e. 2018, 2019 2020 which caused infrastructure obstructed road access central west Aceh. The SRT measured two profileslong road.Data measurements were conducted on side Babahrot - GayoLues section had experienced landslides.Measurements made using Seismograph PASI 16S24-P 24 geophones obtain 92-meterlong profile with 2 meter spacing between geophones. P-wave velocity data modeling done ZondST2D software.The results profiles 1 describe three different subsurface layers.The model consists slate (0.2 0.7 km/s), clay (0.8 1.3 sandy (1.4 1.9 km/s).While, (0.5 1.0 (1.1 1.6 km/ s), (1.7 2.5 km/s).The contrasting wave shows method can be used studies as reference determining mechanism system.