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All Journal Jambura Geoscience Review
Mooduto, Tirsya Aygina Jaenet
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Earth & Planetary Sciences

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Tsunami Modeling Study in Geological Disaster Mitigation in the Kwandang Region Mooduto, Tirsya Aygina Jaenet; Ahmad, Fadhil Abdillah; Kodung, Mohamad Ashar Fitrayadi Ramdan S.; Sari, Ni Luh Ananda Pusvita; Hidayansya, Taufik; Permana, Aang Panji
Jambura Geoscience Review Vol 6, No 1 (2024): Jambura Geoscience Review (JGEOSREV)
Publisher : Universitas Negeri Gorontalo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37905/jgeosrev.v6i1.22561

Abstract

The northern coast of the northern arm of Sulawesi is the meeting place of 3 plates that collided with each other during the Neogene period. This condition makes the northern part of Gorontalo, especially Kwandang sub-district, very prone to earthquakes with magnitudes above 6 on the Richter scale (SR), which is one of the triggers for tsunamis. In the period from 1990 - 2008, there were 4 major earthquakes recorded in Gorontalo, namely 1990 (7.3 SR), 1991 (7.1 SR), 1997 (7.0 SR) and 2008 (7.7 SR). Therefore, further research is needed on the return period of the earthquake and the tsunami model that occurs and the sign of tsunami occurrence in the past. This research aims to determine the return period of the earthquake that caused the tsunami and the tsunami model as well as the sedimentology analysis of paleotsunami deposits. The calculation of the earthquake return period uses the Guttenberg-Richter method. Modeling calculations were carried out using the COMCOT numerical model. This model performs calculations by solving shallow water equations in the form of both linear and non-linear equations. Paleotsunami deposits were analyzed using the sedimentology method. The results of the calculation at a magnitude of 6.0 SR show that within 100 years, the study area has a chance of a potentially destructive earthquake of 1.14024978. The results of modeling the tsunami-prone zone, obtained an area of 165.598389 ha. And obtained paleotsunami deposits containing foraminifera with a sediment thickness of 14 cm.
Porosity Value Analysis of Limestone as a Groundwater Reservoir in West Kaidundu Village, Bulawa Sub-District, Bone Bolango Regency Mooduto, Tirsya Aygina Jaenet; Permana, Aang Panji; Hutagalung, Ronal
Jambura Geoscience Review Vol 7, No 1 (2025): Jambura Geoscience Review (JGEOSREV)
Publisher : Universitas Negeri Gorontalo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37905/jgeosrev.v7i1.28313

Abstract

West Kaidundu is a village with diverse terrain conditions, covering high hilly areas, some lowlands, and coastal areas in Bulawa Sub-District, Bone Bolango Regency. The diverse morphological and geological conditions have an impact on the potential of natural resources, the distribution of limestone, and different geological structures.Research on the porosity of limestone is crucial to obtain information about its porosity value. A study analyzing the porosity of limestone in Kaidundu Barat Village has not been conducted before. Therefore, this research is significant and interesting to carry out at the study location. The results of the study reveal the geological conditions of the research area, which consists of three geomorphological units: pyroclastic ridge, karst plain, and alluvial plain units. The study area is composed of wackestone and mudstone limestone, pyroclastic breccia, and alluvial deposits. From the porosity analysis, the wackestone limestone in the study area, categorized as reservoir rock, falls into the poor category, while the mudstone limestone is classified as fair.
Co-Authors Ahmad, Fadhil Abdillah Hidayansya, Taufik Hutagalung, Ronal Kodung, Mohamad Ashar Fitrayadi Ramdan S. Permana, Aang Panji Sari, Ni Luh Ananda Pusvita