Land Subsidence Caused by Active Fault Due to the Palu Earthquake
Afiat Anugrahadi (a*), Untung Sumotarto (a), Taat Purwiyono (b)
a) Geological Engineering Department, FTKE Universitas Trisakti, Jakarta, Indonesia
*afiat[at]trisakti.ac.id
b) Mining Engineering Department, FTKE Universitas Trisakti, Jakarta, Indonesia
Abstract
The Palu earthquake on 28 October 2018 not only destroyed the facilities and infrastructure of human life in the Palu area and its surroundings, but also geological aspect. The earthquake geologically not only caused land and rock movements, tsunamis, and geological damage such as the formation of new faults and fractures, but liquefaction also occurred. The geological survey was carried out five days after the earthquake, the data and information obtained were used to analyze geological impacts of the earthquake. Visually, it is clear the movement of land and rocks on the surface of the earths earth around Palu with the collapse and collapse of houses, hotels and various human settlements. Activation of faults and fractures has caused a shift in the road lane in Palu - Donggala. Subsidence was caused by active faults, especially Palu-Koro fault, as an impact of the Palu tectonic earthquake between 0.5 - 2.5 meters.
Keywords: Earthquake; Palu; Fault; Subsidence.
Topic: Disaster Management and Environmental Issues