Hazard Study of Earthquake and Liquefaction in Correctional Institution Palu, Central Sulawesi

Abstract

Earthquakes in Palu and surroundings area on 28 September 2018 gave the significant impacts to publicfacilities damage, such as the Correctional Institution Class II A Palu. The correctional institution areawhere was located only ±300 metres from the liquefaction zones in Petobo also hit by the phenomenon ofliquefaction triggered by the earthquake. Based on The Regulation of Ministry of Laws and Human RightsRepublic of Indonesia article 4 point (d) stated that correctional institutions are located far away from thepossibility of natural hazards (earthquakes, floods, landslides) and integrated with wastewater disposal toavoid environmental effects (Minister of Law and Human Rights Regulations, 2011). The disasters thatoccurred should be the challenge and the problems for Correctional Institutions Palu in undertaking thecompulsories and the functions in disaster-prone area. The first objective of this study was to analyse theearthquakes and liquefaction threat in Correctional Institution Palu area. Threat level index of Correctional Institutions Palu obtained from the threat level zone maps within the 2018 events by DIBI and USGS. Thehazard map conducted through analysing types of earthquake threat related to disaster events in the studyarea. Moreover, observation and interview conducted for the data collection. This study found theCorrectional Institutions Palu area was categorized as earthquakes-prone area, as the impact re-establishingof special patterns for correctional institutions location should be re-investigated.