This purpose of this research is to reveal the social benefits and costs felt by the communities affected by earthquake and liquefaction mitigation in Sigi Regency. This research is a type of qualitative research using the ethnomethodology method as a way to understand how the social benefits and costs are felt by the community after earthquake and liquefaction disasters. Data obtained by conducting in-depth observations and interviews in person and by telephone for 4 months, as well as documents, and conducting literacy reviews from various sources.The results showed that in analyzing social benefits and social costs, we looked at the aspects of economic losses, physical losses, psychological losses, and social losses. Disasters cause social losses in terms of destroying the order of life in society where victims experience psychological problems due to loss of property, loss of residence, loss of family, and loss of meaning in life. Behind that disaster also has social benefits, namely the creation of emotional bonds in the form of mutual help and spiritual benefits. The existence of disaster mitigation is expected to be an effort to reduce disaster risk, both through physical development as well as awareness and increased capacity to face disaster threats.

Keywords : Ethnometodology, Liquefaction, Social Benefits, Social Costs, Disaster Mitigation.