AN EVALUATION OF LIQUEFACTION POTENTIAL IN THE REGION OF PADANG CITY

Padang City is a city located on the Coastline of West Sumatra Coast that vulnerable to earthquakes and tsunamis. This vulnerability allows liquefaction phenomenon when an earthquake occurs. Factors affecting are soil type, grain grading, ground water level, relative density vibration. study aims analyze potential based value safety factors obtained by using Seed et al (1985) method Liquefaction Potential Index (LPI) which map level at location being reviewed. Earthquake data Indonesia meterological, climatology, geophysics agency (BMKG) (2009-2019) maximum surface acceleration (PGA) attenuation equation from Young al. The calculation parameters judged factor (FS), if FS> 1 it means there no for FS <1 potentially possibility. Based calculations these methods, results ten points reviewed were almost all sites variations in magnitude with sand silt types other average groundwater below 1.5m.