Utilization of Satellite Gravimetric Data to Estimate the Location of the Magma Chamber of Slamet Volcano, Central Java, Indonesia

Sehah Sehah, Sorja Koesuma, Urip Nur Wijayanto Prabowo, Aina Zahra Ikhwana

Abstract

Satellite gravimetric data can be utilized to map the gravity anomaly on the earth's surface, especially for difficult, extreme, and large areas. In this study, satellite gravimetric data has been used to estimate the location of the magma chamber of Slamet volcano, Indonesia. Information on the magma chamber is very useful for knowing the volcanic characteristics and activity, thus helping pre-mitigation efforts to catastrophic eruptions that occur. The stages in the study which have been carried out include data access, correction, reduction, modeling, and interpretation. The satellite gravimetric data that has been accessed is GGMplus data. After several corrections and reductions are done, the complete Bouguer anomalies (CBA) data are obtained with values ranging from 11.889 – 117.429 mGal. Filtering process using the upward continuation has been applied to obtain regional anomalies data. The regional anomalies data are corrected to the CBA data, so that the residual gravity anomalies data are obtained. The lowest gravity anomaly value is located at positions of 109.21967 E and 7.24281 S which is interpreted to be the location of the magma chamber of Slamet Volcano that is currently still active. The result of modeling of the residual gravity anomalies data indicate that the position of the magma chamber of Slamet Volcano is estimated to be relatively under the cone with a density lower than the surrounding rock densities, i.e. 1.50 – 1.75 g/cm3. The study results have a good match with the geological map of the study area.

Keywords

satellite gravimetric; magma chamber; Slamet Volcano; 3D modeling

Full Text:

PDF

References

Djafar, A., and Nurlathifah, A., 2020. Identification of the Geological Diversity of Mount Slamet's Cinder Cone as a Geotourism Object. Bulletin of Scientific Contribution: Geology, 18(1): 13-24. Triastuty, H., Mulyana, I., Surmayadi, M., Alfianti, H., Ipmawan, V., Rusdi, M., Kriswati, E., Sulton, F., 2020. Comparative Study of Mount Slamet Activity: Crisis Period 2019 with 2014 Eruption. Proceedings of the Colloquium on Volcanic Studies, 2019. Center for Volcanology and Geological Hazard Mitigation. Geological Agency. Jakarta. Djauhari, N., 2014. Introduction to Geology. Yogyakarta. Deepublish: 162-167. Gharehchahi, S., 2017. Volcanic Processes and Landforms. The International Encyclopedia of Geography. John Wiley & Sons, Ltd. DOI: 10.1002/9781118786352.wbieg1183. Djuri, M., 1996, Geological Map of The Purwokerto and Tegal Quadrangles, Jawa. Geological Research and Development Center. Bandung. Sutawidjaja, I.S., Aswin, D. and Sitorus, K., 1985, Geologic Map of Slamet Volcano, Central Java. Volcanological Survey of Indonesia. Bandung. Pratomo, I., 2012. Geological Diversity of the Mount Slamet Volcanic Complex, Central Java: Mount Slamet Ecology; Geology, Climatology, Biodiversity, and Social Dynamics. Jakarta. LIPI Press: 15-29. Pratomo, I., and Hendrasto, M., 2012. Characteristics of the Eruption of Mount Slamet, Central Java. Mount Slamet Ecology; Geology, Climatology, Biodiversity, and Social Dynamics. Jakarta. LIPI Press: 1-14. Agustin, N., and Wibawa, A., 2022. Analysis of Gravity Data for Identification of Subsurface Structures in the Cipari Geothermal Potential Area. Jambura Geoscience Review, 4(1): 22-32. Ganiyu, S.A., Badmus, B.S., Awoyemi, M.O., Akinyemi, D., and Olurin, O.T., 2013. Upward Continuation and Reduction to Pole Process on Aeromagnetic Data of Ibadan Area, South-Western Nigeria. Earth Science Research, 2(1): 66-73. Handyarso, A., and Kadir, W.G.A., 2017. Gravity Data Decomposition Based on Spectral Analysis and Halo Wavelet Transform, Case Study at Bird’s Head Peninsula, West Papua. Journal of Engineering and Technological Sciences, 49(4): 423-437. Blakely. R.J., 1995. Potential Theory in Gravity and Magnetic Applications. Cambridge University Press. New York, USA. Camacho, M., Alvarez, R., 2021. Geophysical Modeling with Satellite Gravity Data: Eigen-6C4 vs. GGM Plus. Engineering, 13(12): 690-706 Sehah, Prabowo, U.N., Raharjo, S.A., Ariska, L., 2022. Power Spectrum Analysis of the Satellite Gravity Anomalies Data to Estimate the Thickness of Sediment Deposits in the Purwokerto-Purbalingga Groundwater Basin. Advances in Physics Research, 5: 109-117. Ilapadila, Harimei, B., Maria, 2019. Analysis of Regional Anomaly on Magnetic Data Using the Upward Continuation Method. IOP Conf. Series: Earth and Environmental Science 279(2019) 012037: 1-6. Iswahyudi, S., Jati, I.P., and Setijadi, R., 2018. Preliminary Study of the Geology of Tirta Marta Lake, Purbalingga, Central Java. Jurnal Ilmiah Dinamika Rekayasa, 14(2): 86-91. Stella E.M.S, and David, F.A., 2015. Regional Magnetic Field Trend and Depth to Magnetic Source Determination from Aeromagnetic Data of Maijuju Area, North Central, Nigeria. Physical Science International Journal, 8(3), 1-13. Sedlak, J., Gnojek, I., Scheibe, R., and Zabadal, S., 2009. Gravity Response of Igneous Rocks in the Northwestern Part of the Bohemian Massif. Journal of Geosciences, 54(2009): 325-342. Lumbanraja, W.,and Brotopuspito, K.S., 2015. IIdentification of Magma Dynamics Based on Analysis of Volcanic Tremors at Slamet Volcano, Central Java. Jurnal Fisika Indonesia, 19(57): 55-61.

DOI: https://doi.org/10.13057/ijap.v13i2.73923

Refbacks

  • There are currently no refbacks.