Gorontalo is one of the areas prone to earthquakes because Gorontalo has a geological structure, which is a fault. This fault has a northwest-southeast direction that cuts across the Gorontalo City area and crosses Lake Limboto. The research objective is to determine the direction of subsurface geological structures and analyze the impact of geological structures on the GORR development infrastructure. The research method is divided into several stages, namely, the preparation phase, the stage of data collection and the stage of data processing and analysis. The preparatory phase includes literature studies and regional geological studies. The next step is data collection in the field including lithology, geomorphology and structural data. And finally, data processing and analysis uses several classifications. Based on surface data, there are several types of lithology such as tuff, clay, and limestone which have started to decay. Geological structure in the form of fault / normal fault with northwest-southeast direction is also found in the study area. Based on subsurface data there are three types of layers namely clay sand, alluvial, and sandstone which are determined based on the classification of rock and mineral resistivity. Subsurface data also shows faults, in the same direction. And based on the vertical resistivity cross section shows the slip area seen from the resistivity value of the layer above it has a lower value than the layer below, it is very possible for landslides because the layer is more easily eroded and flowed, plus supported by a fairly steep field and rainfall in the GORR Region high enough.

Robot, L. C., Manyoe, I. N., Arifin, Y. I., Saputra, M. J. A., Bilgais, A. A., Abdullah, R. A., & Napu, S. S. S. (2021, July). Surface and subsurface analysis based on the geological structure and electrical resistivity Data in Gorontalo Outer Ring Road (GORR), Huidu Utara. In Journal of Physics: Conference Series (Vol. 1968, No. 1, p. 012054). IOP Publishing.

Indexed in Scopus, Q4.

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).

Ponto, N. F., Manyoe, I. N., Zakaria, S. A. P., Usman, M. M., & Sumarjis, S. A. I. (2021, July). Seismicity of Suwawa Timur area based on analysis of earthquake: the depth and magnitude. In Journal of Physics: Conference Series (Vol. 1968, No. 1, p. 012046). IOP Publishing.

Indexed in Scopus, Q4.

Gorontalo has geological diversity that can be developed for geotourism. One of the tourist destinations of Gorontalo that has geological features is Pantai Indah. This study aims to examine the geological features in the Pantai Indah area based on the assessment of the value of science, education, tourism and the risk of degradation. The method used is geological observation and geological feature assessment issued by the Geological Agency. The research's results reveal that the landforms of Pantai Indah were composed of intrusion hills and marine plains. The lithology of the Pantai Indah area is granite and alluvial deposits. There is a geological structure that is indicated as a normal fault. The weighting of the criteria for the values of science, education, tourism and the risk degradation in the Pantai Indah area is 53.75%, 77.5%, 65%, 76.25%, respectively.

Arifin, Y. I., Manyoe, I. N., & Napu, S. S. S. (2021, July). Geological study of Pantai Indah for geotourism development based on geological observation and assessment of science, education, tourism and the risk degradation. In Journal of Physics: Conference Series (Vol. 1968, No. 1, p. 012048). IOP Publishing.

Indexed in Scopus, Q4.

Geothermal areas are unique. Therefore, it can be developed to become a geotourism destination. Limboto Lake plain has geothermal potential which is indicated by the appearance of several points of manifestation. This study aims to assess the value of science, education, tourism and the risk of degradation in the geothermal area of the Limboto Lake plain unit. The method used is the assessment of the value of science, education, tourism and the risk degradation issued by the Geological Agency. The assessment was carried out in two geothermal areas located on the plain of Lake Limboto, namely Geothermal Pentadio. The research results showed that the weighting of the criteria for the values of science, education, tourism and the risk degradation in the Pentadio geothermal area were 73.75%, 73.75%, 75%, 65%, respectively.

Manyoe, I. N., Arifin, Y. I., Napu, S. S. S., & Suma, M. D. (2021, July). Assessment of the values of science, education, tourism and the risk degradation of Pentadio geothermal areas to developing geotourism in the Limboto Lake Plain, Gorontalo. In Journal of Physics: Conference Series (Vol. 1968, No. 1, p. 012047). IOP Publishing.

Indexed in Scopus, Q4.

The tourism potential that is born from the concept of leading tourism in a village can increase people's income. The development of a village into a tourism village is not only by optimizing the existing tourism potential but also by paying attention to the protection of tourists and village communities from disaster factors. West Pentadio Village is bordered by Limboto Lake so that it has enormous potential if it is developed into tourism. However, Pentadio Barat Village is also prone to disasters so tourism development must be accompanied by efforts to reduce disaster risks. Programs implemented through the Thematic Community Service Program Period I 2020 entitled "Optimizing Tourism Potential and Reducing Disaster Risk in West Pentadio Village to Support Sustainable Development in the Limboto Plains Area, Gorontalo District" include: 1) survey of tourism potential; 2) survey of potential disasters; 3) making tourist information boards; 4) creating a disaster risk reduction information board; 5) development of a tourism module; 6) creation of a disaster module; 7) socialization of SDGs, tourism and disasters; 8) action program to optimize tourism potential; 9) disaster risk reduction program action; 10) educational programs through geothermal schools; 11) making information media; and 12) additional programs. These KKN programs form the basis for the next steps towards realizing integrated tourism and disaster risk reduction at Pentadio Barat.

Keywords: tourism, disaster, geothermal, flood.

Manyoe, I. N., & Hutagalung, R. (2021). Optimalisasi Potensi Wisata Dan Pengurangan Resiko Bencana Di Desa Pentadio Barat Untuk Mendukung Pembangunan Berkelanjutan Daerah Dataran Danau Limboto, Kabupaten Gorontalo. J-Dinamika: Jurnal Pengabdian Masyarakat, 6(1), 103-111.

Indexed in Google Scholar.