Microzonation of potential liquefaction in Sidoarjo mud volcanoes (LUSI)

LUSI still holds potential hazards, for the past 16 years in addition to the mudflow process that is still active, the presence of high pore water pressure in the affected area has caused various subsequent disaster impacts. When the pore pressure is increased, the effective stress decreases and has an impact on reducing the strength of the soil / rock. Liquefaction has a high potential to occur in LUSI, the main conditions for triggering liquefaction have been met in the study area including the presence of shallow groundwater levels, soil properties, and seismicity factors. The research method is an empirical analysis based on standard penetration test (SPT) based evaluation, SPT tests from 26 drill points with N-SPT values