Salsabila Aulia Putri Zakaria’s scientific contributions

Kwandang is a district located in the northern part of Gorontalo. The purpose of this research is to analyze the depth and magnitude earthquake zone that occurred in the district of Kwandang, Gorontalo Utara regency based on seismicity map. The astronomical research location is located at 0° 49' 39" S, 122° 55' 8" E. The method used in this research is seismicity map analysis. The earthquake that dominates in Kwandang, based on the value of its depth, namely shallow earthquake (0-70 km) and medium earthquake (70-300 km). This is caused by subduction activity in the direction of the subduction of the north arm of Sulawesi towards south of Tomini Bay. Whereas based on the strength of the earthquake in Kwandang sub-district is dominated by small earthquakes (-) with a light, mild earthquake. Based on the depth zonation, earthquakes mostly occurred in the west. Based on the magnitude, the earthquakes mostly occurred in the southwest.

North Sulawesi is an area close to the earthquake source due to tectonic processes such as active faults. This study aims to analyze the earthquake in Suwawa Timur from the earthquake depth and magnitude data. The method used in this research is a qualitative method by collecting and processing earthquake data. The analysis was carried out by creating a seismicity map of the Suwawa Timur area. The map shows that the earthquake points in Suwawa Timur are at shallow earthquakes (0 - 70 km) and moderate earthquakes (70 - 300 km). Shallow earthquakes are usually sourced from active seismic movement activity. Lithological conditions and structural geology affect the magnitude and depth of the earthquake value. Zonation map relates to the epicenter point of Suwawa Timur. Suwawa Timur is dominated by minor earthquakes (0.0 - 3.9), light earthquakes (4 - 4.9), and there is one point of a moderate earthquake (5 - 5.9).