Delineasi Potensi Perpanjangan Sesar Probolinggo Berdasarkan Respon Anomali Gravitasi Hibrid

Noor Efendi; M. Aryono Adhi; Muhamad Syirojudin; Supriyadi

doi:10.31539/bnfte278

Authors

Noor Efendi Universitas Negeri Semarang; Badan Meteorologi Klimatologi dan Geofisika
M. Aryono Adhi Universitas Negeri Semarang
Muhamad Syirojudin Universitas Negeri Semarang; Badan Meteorologi Klimatologi dan Geofisika
Supriyadi Universitas Negeri Semarang

DOI:

https://doi.org/10.31539/bnfte278

Abstract

This research aimed to delineate the potential extension of the Probolinggo Fault based on hybrid gravity anomaly responses to minimize uncertainties in earthquake disaster mitigation information. The method employed integrates primary terrestrial gravity data from field measurements (72 points) with secondary GGMPlus-SRTM2gravity 2018 satellite data using the collocated cokriging technique. Analysis was conducted using regional-residual anomaly separation via Band Pass Filter, alongside the application of First Horizontal Derivative (FHD) and Second Vertical Derivative (SVD) methods to identify structural lineaments. The results show that the hybrid gravity anomaly distribution ranges from -14 mGal to 17 mGal, representing the density variations of Argopuro and Lamongan volcanic rocks. Fault lineament delineation was identified over approximately 22 km with a West-East orientation, traversing from Liprak Kidul to Betektaman. Based on an SVD value evaluation showing parity between the hanging wall and footwall (averaging 0.25 mGal/m²), this structure is identified as a strike-slip fault. The study concludes that indications of a westward fault extension beyond the boundaries previously established by Pusgen were found. The use of hybrid data proved to provide optimal spatial resolution in bridging information gaps regarding subsurface structures in areas covered by Quaternary volcanic materials.

Keywords: Delineation, FHD, Hybrid Gravity, Probolinggo Fault, Derivative

References

Asra, A., Syamsuddin, F., & Yudistira, T. (2020). Identification of the Sumatran Fault Segment in the Tarutung Basin based on gravity data analysis. Indonesian Journal on Geoscience, 7(1), 35–46. https://doi.org/10.17014/ijog.7.1.35-46

Faiza, M. N., Sarkowi, M., Rismal, M., & Mukhlis, R. (2024). Identifikasi zona sesar berdasarkan data gravitasi daerah Pasaman Barat Sumatra Barat. Jurnal Geosaintek, 10(3), 242–260. https://doi.org/10.12962/j25023659.v10i3.2081

Fitriani, D. S., Putri, S. N. A., & Putrajy, I. F. (2020). Metode gravitasi untuk identifikasi Sesar Weluki dengan analisis First Horizontal Derivative dan Second Vertical Derivative. Prosiding Seminar Nasional Fisika (E-Journal) SNF2020, 9, 53–60. https://doi.org/10.21009/03.SNF2020.01.FA.10

Hidayatullah, R., & Jannah, W. (2019). Identifikasi Sesar Opak Yogyakarta berdasarkan data gravitasi menggunakan metode Second Vertical Derivative. Jurnal Geofisika, 17(1), 12–17. https://doi.org/10.36435/jgf.v17i1.452

Hirt, C. (2014). Filtering and spectral analysis of gravity data. In E. W. Grafarend (Ed.), Encyclopedia of Geodesy. Springer. https://doi.org/10.1007/978-3-319-02370-0_26-1

Mardiyah, A., Fachrizal, Mahmud, A. F., & Purwoko, A. (2024). Identifikasi Sesar Gorontalo dengan memanfaatkan data gravitasi satelit resolusi tinggi. Jurnal Fisika Unand, 13(5), 658–664. https://doi.org/10.25077/jfu.13.5.658-664.2024

Pusat Studi Gempa Nasional (Pusgen). (2017). Peta sumber dan bahaya gempa Indonesia tahun 2017. Balitbang Kementerian PUPR.

Rochman, J. P. G. N., Hidayat, R., Mulyani, T. S. R., Saepuloh, A., & Wahyudi. (2021). Preliminary study of Probolinggo active fault in East Java based on gravity method. IOP Conference Series: Earth and Environmental Science, 936, 012025. https://doi.org/10.1088/1755-1315/936/1/012025

Sarkowi, M., & Wibowo, R. C. (2016). Identifikasi struktur geologi panas bumi Way Ratai berdasarkan data anomali gayaberat. Jurnal Geofisika, 1(1), 22–32. https://doi.org/10.36435/jgf.v1i1.118

Setiabudiwibowo, A. P., Efendi, N., Rachmat, A., & Triadhy, D. A. (2025). Comparison of upward continuation and moving average filters for satellite gravity data in Probolinggo Fault case study. IOP Conference Series: Earth and Environmental Science, 1486, 012021. https://doi.org/10.1088/1755-1315/1486/1/012021

Setyawan, A., Ramadhan, F., & Sarkowi, M. (2020). Identification of geological structure using Second Vertical Derivative (SVD) method in "X" geothermal field. Jurnal Geofisika, 18(1), 1–6. https://doi.org/10.36435/jgf.v18i1.461

Suarbawa, K. N., Adnyana, I. G. A. P., & Riyono, E. (2020). Identification of local faults of Tejakula Buleleng Bali with anomaly gravity data using second vertical derivative method. International Journal of Physics & Mathematics, 3(1), 18–25. https://doi.org/10.31295/ijpm.v3n1.170

Sudrajad, B., Faried, M., Wahyuningsih, S., & Mustofa, A. (2024). Identifikasi patahan seismo-tektonik Jayapura berdasarkan pemodelan inversi 3D data gravitasi. JGE (Jurnal Geofisika Eksplorasi), 10(1), 47–64. https://doi.org/10.23960/jge.v10i1.372

Sumintadireja, P., Dahrin, D., & Grandis, H. (2018). A note on the use of the Second Vertical Derivative (SVD) of gravity data with reference to Indonesian cases. Journal of Engineering and Technological Sciences, 50(1), 127–139. https://doi.org/10.5614/j.eng.technol.sci.2018.50.1.9

Suwarti, T., & Suharsono. (1993). Peta geologi lembar Probolinggo, Jawa [Geological map]. Pusat Penelitian dan Pengembangan Geologi.

Syaputra, E. W., Zulaikah, S., Wisodo, H., & Yuliati, L. (2023). Identifikasi sesar segmen Ketahun berdasarkan metode First Horizontal Derivative (FHD) dan Second Vertical Derivative (SVD) data anomali gaya berat GGMplus. Jurnal Fisika Unand (JFU), 12(4), 598–607. https://doi.org/10.25077/jfu.12.4.598-607.2023

Telford, W. M., Geldart, L. P., & Sheriff, R. E. (1990). Applied geophysics (2nd ed.). Cambridge University Press.