Geomorphological Impact of Palu Earthquake
Anugrahadi, A., Sumotarto, U., & Purwiyono, T.P.
Geology Engineering Department, FTKE Universitas Trisakti, Jakarta
Abstract
Sulawesi and Maluku islands are tectonically under a collision area of four earth crust plates, those are Eurasia, Philiphine Islands, Pacific Ocean and Australian-India Ocean. Palu city in Central Sulawesi island in particular is geologically an area of complex structure. A fault zone of north-west to south-east direction has formed Palu area as a block being squized by Palu-Koro strike-slip fault zone. The earthquake happened on October 28, 2018 has caused the fault to activate of being dynamic movement of the area. Rock and soil slide and movement was also strengthened by liquifaction of hydrological fluid content within the Palu block. Morphology of Palu-Koro fault plane was also affected siginificantly causing land slides and slumps on the fault plane exposed in the earth surface. Using hand camera photos, a morphological survey and analysis show the landslides and slumps could be clearly identified.
Keywords: Palu earthquake, Palu-Koro strike slip fault, geomorphological impact
Topic: Environmental Engineering