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All Journal Jurnal Ilmu Fisika Jurnal Pendidikan, Sains, Geologi, dan Geofisika (GeoScienceEd Journal) Indonesian Journal of Earth Sciences
Setiahadiwibowo, Ajimas Pascaning
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Agriculture, Biological Sciences & Forestry Astronomy Chemistry Earth & Planetary Sciences Education Environmental Science Materials Science & Nanotechnology Physics

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Penentuan Fasies Sentral Gunung Api Purba Menggunakan Metode Gravitasi Pada Kawasan Gunung Ijo, Pegunungan Kulonprogo Nuzula, Jannatul Firdausi; Setiahadiwibowo, Ajimas Pascaning
Jurnal Pendidikan, Sains, Geologi, dan Geofisika (GeoScienceEd Journal) Vol. 4 No. 2 (2023): December
Publisher : Mataram University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/goescienceed.v4i2.233

Abstract

The Kulon Progo Mountains are a range of Old Volcanoes that are no longer active so that the body is difficult to identify as a volcano body. One of the old volcanoes in the Kulon Progo Mountains is Mount Ijo. The description of the subsurface through the characteristics of the existence of ancient volcanoes uses a geophysical method approach, namely the gravity method with supporting data in the form of geological studies of the Mount Ijo area. This is done to get the distribution of variations in the subsurface gravity field of Mount Ijo. The gravity data used is GGMPlus gravity satellite data with a lot area of 8.32 x 14.23 Km with a point distribution of 2368 points. In the processing process, a derivative analysis is carried out using Total Horizontal Derivative (THD) and Total Derivative (TDR). The results obtained from the ABL value of the Mount Ijo area illustrate the distribution of gravity anomaly values with high values ranging from 0.2 mGal to 3.5 mGal in the center of the map indicating the presence of the peak of Mount Ijo which is the central facies of Mount Ijo. Supported by the presence of structures in the form of faults and intrusion hills included in the proximal facies surrounding the central facies.  The 2.5-dimensional model of the 2 incisions of the residual anomaly map has a depth of 800m and produced a picture of the central facies, proximal facies and a small part of the medial facies of Mount Ijo.
Analysis of the Relationship Between Resistivity and Seawater Moisture Content Percentage in Loose Sand Medium on the Yogyakarta Coastal Area Pratama, Yudha Agung; Paradise, Mycelia; Suharsono, Suharsono; Hidayat, Wahyu; Setiahadiwibowo, Ajimas Pascaning
Indonesian Journal of Earth Sciences Vol. 5 No. 2 (2025): July-December
Publisher : MO.RI Publishing

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.52562/injoes.2025.1767

Abstract

This study investigates the effect of seawater moisture content on the resistivity of unconsolidated sand in the coastal region of Yogyakarta. Laboratory experiments were conducted using a standard ASTM G-57 soil box with samples prepared at varying percentages of seawater moisture content. The results indicate that increasing seawater content in the sediment medium leads to an exponential decrease in resistivity. A mathematical relationship was established in the form of a power function: R=1145.7MC?2.23. Resistivity values tend to stabilize when the moisture content exceeds 13%. A resistivity range of 0.8–2.8 ??m is proposed as a cut-off for identifying seawater intrusion in coastal areas. These findings provide an important contribution to the development of geoelectrical methods for monitoring seawater intrusion and evaluating groundwater quality in coastal regions, which can serve as a basis for sustainable water resource management.
Penentuan Fasies Sentral Gunung Api Purba Menggunakan Metode Gravitasi Pada Kawasan Gunung Ijo, Pegunungan Kulonprogo Nuzula, Jannatul Firdausi; Setiahadiwibowo, Ajimas Pascaning
Jurnal Pendidikan, Sains, Geologi, dan Geofisika (GeoScienceEd Journal) Vol. 4 No. 2 (2023): December
Publisher : Mataram University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/goescienceed.v4i2.233

Abstract

The Kulon Progo Mountains are a range of Old Volcanoes that are no longer active so that the body is difficult to identify as a volcano body. One of the old volcanoes in the Kulon Progo Mountains is Mount Ijo. The description of the subsurface through the characteristics of the existence of ancient volcanoes uses a geophysical method approach, namely the gravity method with supporting data in the form of geological studies of the Mount Ijo area. This is done to get the distribution of variations in the subsurface gravity field of Mount Ijo. The gravity data used is GGMPlus gravity satellite data with a lot area of 8.32 x 14.23 Km with a point distribution of 2368 points. In the processing process, a derivative analysis is carried out using Total Horizontal Derivative (THD) and Total Derivative (TDR). The results obtained from the ABL value of the Mount Ijo area illustrate the distribution of gravity anomaly values with high values ranging from 0.2 mGal to 3.5 mGal in the center of the map indicating the presence of the peak of Mount Ijo which is the central facies of Mount Ijo. Supported by the presence of structures in the form of faults and intrusion hills included in the proximal facies surrounding the central facies.  The 2.5-dimensional model of the 2 incisions of the residual anomaly map has a depth of 800m and produced a picture of the central facies, proximal facies and a small part of the medial facies of Mount Ijo.
Structural Interpretation of the Jonggol Mount Area, Kulon Progo, Yogyakarta, Using Gravity Inversion Modelling Setyo Pambudi; Prastowo, Rizqi; Setiahadiwibowo, Ajimas Pascaning
Jurnal Ilmu Fisika Vol 18 No 1 (2026): March 2026
Publisher : Jurusan Fisika FMIPA Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jif.18.1.67-79.2026

Abstract

The Mount Jonggol region in Kulon Progo, Yogyakarta, constitutes an important segment of the Sunda–Banda magmatic arc system; however, its subsurface structural configuration remains insufficiently understood. This study aims to interpret subsurface structures and lithological boundaries through derivative analysis and three-dimensional gravity inversion modelling. The gravity dataset was obtained from the Global Gravity Model Plus (GGMplus), which provides absolute gravity acceleration measurements with high spatial resolution. The data were processed using sequential corrections, including normal gravity, free-air, simple Bouguer, and terrain corrections, to generate the Complete Bouguer Anomaly (CBA). The resulting CBA data were analyzed using the First and Second Horizontal Derivative (FHD and SHD) methods to delineate structural discontinuities, fault planes, and density contrasts. Furthermore, three-dimensional inversion modelling was conducted to visualize subsurface density variations to a depth of approximately 3.5 km. The results indicate that Mount Jonggol is situated at the tectono-lithological boundary between the low-density Jonggrangan Formation (2.0–2.4 g/cc) and the high-density Old Andesite Formation (2.7–3.0 g/cc). The gravity anomaly pattern reveals a northwest–southeast-oriented magmatic corridor controlled by thrust and strike-slip fault systems, providing important insights into the tectono-magmatic evolution and uplift mechanisms of southern Central Java.
Co-Authors Mycelia Paradise Nuzula, Jannatul Firdausi Pratama, Yudha Agung Rizqi Prastowo Setyo Pambudi Suharsono Suharsono Wahyu Hidayat