The main effect of an earthquake for an area is the loss that has an impact on social, economic and physical conditions. Based on earthquake data from the USGS, the earthquake that occurred in the North Sumatra area would have an impact on the surrounding area, especially in Deli Serdang Regency. Seen from the geological map, the Medan sheet shows that the Deli Serdang area is located in a fault zone. The purpose of this study is to identify earthquake-prone areas as a study in regional planning in Deli Serdang Regency with the target of this research being to provide benefits in policy making and readiness for earthquake risk in Deli Serdang Regency and this research will contribute to science in identifying areas that have the potential for earthquake disasters. The method in this study emphasizes data collection in the form of rock types, land slopes, seismic data in the form of soil acceleration in the bedrock and areas located in the fault zone. These parameters will be weighted and analyzed in order to obtain a model that represents field conditions. Analyzing the data using the overlay method so as to obtain the typology of earthquake-prone areas. The results of the analysis describe the typology of earthquake-prone areas consisting of areas with typology A with a stable classification of 10.45%, typology A with a less stable classification of 39.51%, typology B with a less stable classification of 43.89%, typology C with less stable classification was 4.89%, the area with typology D and unstable classification was 1.25% and the area with typology E classification unstable was 0.02%.

In supporting the objectives of the Urban Spatial Plan, it is necessary toconduct a study on the readiness for response to natural geological disasters, especially areas located in fault zones as one of the sources of earthquake disasters in order to reduce risks that will occur and prepare serious mitigation studies on disaster management with efforts prevention, risk reduction and increased community preparedness in facing disasters. Part of the Deli Serdang Regency is an area located in the fault zone, namely in the Pancur Batu District and part of the Namorambe District. Based on these conditions, it is necessary to observe the impact on the development of the area around the fault zone. The method used in this study is a quantitative method with survey research and what is needed is seismic hazard data which includes Peak Ground Acceleration (PGA), physical properties of rocks, slope, seismicity, earthquake risk level, frequency of earthquakes, population, productive land and regional capacity. The observation area is Deli Serdang district which consists of 22 (twenty two) districts. The results of the analysis show that some areas of Deli Serdang district are included in earthquake-prone areas based on regional typology, namely type D and type E with land stability in the unstable category, namely some Gunung Meriah sub-districts, some STM Hulu sub-districts, some Sibolangit districts, some sub-districts Kutalimbaru, part of Sibirubiru sub-district and part of STM Hilir sub-district. Areas affected by the earthquake disaster need to be supervised in land use in order to reduce the impact of disasters in the long term and mitigation in the event of a disaster by applying Zoning Regulation and Building Code.