Analisis Distribusi dan Karakteristik Seismisitas Wilayah Pusat Gempa Regional (PGR) IV Periode Mei Tahun 2024
DOI:
https://doi.org/10.24252/sainfis.v6i2.71899Kata Kunci:
Gempa Bumi, Pusat Gempa Regional (PGR) IV, Seismisitas.Abstrak
This study aims to analyze the distribution and characteristics of seismicity in the Regional Earthquake Center (PGR) IV area during May 2024, based on field practice activities at the Meteorology, Climatology, and Geophysics Agency (BMKG) Regional IV Makassar. Earthquake data were obtained from the BMKG catalogue and processed descriptively using QGIS software to map the spatial distribution of events, and to examine the variation in depth, magnitude, and daily occurrence. The results show that 465 earthquakes were recorded during the observation period, dominated by shallow earthquakes (< 60 km) with 433 events, followed by intermediate-depth earthquakes (60–300 km) with 31 events, and one deep earthquake (> 300 km). Most events had magnitudes in the range of 2 ≤ M < 3 (315 events), reflecting a pattern consistent with the Gutenberg–Richter relationship. The spatial distribution follows major active fault systems, with clusters identified around the Palu–Koro Fault, the Matano and Sorowako Faults, and the Balantak Fault, while a notable earthquake swarm was recorded around Tojo Una-Una and Sorowako on 30 May 2024. These findings indicate that seismic activity in the PGR IV region is strongly controlled by regional fault systems and subduction dynamics, and highlight the importance of continuous monitoring and structured mitigation efforts to reduce earthquake and tsunami risk in the area.
Unduhan
Referensi
Ardiansyah, A., Wulandari, T. P., Fariz, M. Z. A., Musyaffa, R. A., & Karlina, D. L. (2024). System Literature Review: Analisis Gelombang Medan Elektromagnetik dan Seismik yang Ditimbulkan oleh Gejala Gempa. Venus: Jurnal Publikasi Rumpun Ilmu Teknik, 2(6), 159–165. https://doi.org/10.61132/venus.v2i6.637
Azhari, M., Syam Rizal, A., & Noviati, R. (2024). Identifikasi distribusi gempa bumi pada PGR Wilayah IV periode Januari–April 2024. Jurnal Sains Fisika: SAINFIS. https://doi.org/10.24252/sainfis.v5i2.54578
Badan Meteorologi, Klimatologi, dan Geofisika. (2025). Data gempabumi terbuka BMKG. BMKG.
Badan Meteorologi, Klimatologi, dan Geofisika. (2026). InaTEWS earthquake repository: Earthquake event catalog. BMKG.
Bellier, O., Sébrier, M., Beaudouin, T., Villeneuve, M., Braucher, R., Bourlès, D., Siame, L., Putranto, E., & Pratomo, I. (2001). High slip rate for a low seismicity along the Palu-Koro active fault in central Sulawesi (Indonesia). Terra Nova, 13(6), 463–470. https://doi.org/10.1046/j.1365-3121.2001.00382.x
Kusumawati, D., Sahara, D. P., Puspito, N. T., Daryono, M. R., Nugraha, A. D., Sadly, M., Prayitno, B. S., Daryono, D., Heryandoko, N., & Rohadi, S. (2024). A new moment tensor catalogue of light to moderate earthquakes in Palu-Koro and Matano faults, Sulawesi, based on the regional network in Indonesia: Fault analysis and insight. Physics of the Earth and Planetary Interiors, 352, 107209. https://doi.org/10.1016/j.pepi.2024.107209
Kusumawati, D., Sahara, D. P., Puspito, N. T., Daryono, M. R., Nugraha, A. D., Sadly, M., Prayitno, B. S., Daryono, D., Heryandoko, N., & Rohadi, S. (2024). Frictional fault strength analysis of Palu-Koro and Matano faults, Sulawesi, Indonesia, from earthquake focal mechanism data. Journal of Earthquake Engineering, 28(13), 3843–3859. https://doi.org/10.1080/13632469.2024.2359437
Liu, C., & Shi, Y. (2022). The role of fault interaction in earthquake migration in Central Sulawesi, Indonesia. Tectonophysics, 839, 229530. https://doi.org/10.1016/j.tecto.2022.229530
Patria, A., Natawidjaja, D. H., Daryono, M. R., Hanif, M., Puji, A. R., & Tsutsumi, H. (2023). Tectonic landform and paleoseismic events of the easternmost Matano fault in Sulawesi, Indonesia. Tectonophysics, 852, 229762. https://doi.org/10.1016/j.tecto.2023.229762
Pusat Studi Gempa Nasional. (2017). Peta sumber dan bahaya gempa Indonesia tahun 2017. Pusat Penelitian dan Pengembangan Perumahan dan Permukiman, Kementerian Pekerjaan Umum dan Perumahan Rakyat.
Shearer, P. M. (2019). Introduction to seismology (3rd ed.). Cambridge University Press.
Watkinson, I. M., & Hall, R. (2017). Fault systems of the eastern Indonesian triple junction: Evaluation of Quaternary activity and implications for seismic hazards. In P. R. Cummins & I. Meilano (Eds.), Geohazards in Indonesia: Earth science for disaster risk reduction (Vol. 441, pp. 71–120). Geological Society of London. https://doi.org/10.1144/SP441.8
