SPATIAL AND TEMPORAL B-VALUE ANALYSIS OF THE YOGYAKARTA REGION USING EARTHQUAKE DATA 1960 – 2024

Authors

  • Sari Rahayu R Department of Geophysical Engineering, Faculty of Exploration and Production Technology, Universitas Pertamina, Indonesia
  • Iktri Madrinovella Department of Geophysical Engineering, Faculty of Exploration and Production Technology, Universitas Pertamina, Indonesia

DOI:

https://doi.org/10.23960/jge.v10i3.468

Keywords:

Yogyakarta earthquake, b-value, Opak fault, maximum likelihood

Abstract

Yogyakarta is one of the areas in Indonesia with a high risk of earthquakes due to its proximity to the subduction zone of the Indo-Australian Plate and Eurasian Plate and the presence of active fault activity, namely the Opak fault, which generates shallow earthquakes. A total of 13 destructive earthquakes were recorded in Yogyakarta and surrounding areas from 1840 to 2023, with the most destructive earthquake occurring in 2006 in Bantul. A total of 417 earthquakes were felt in the Yogyakarta area between May 2006 and March 2016. The high earthquake activity after the 26 May 2006 earthquake indicates a stress field on the active fault segment that has not been fully released.  This study aims to analyze the seismotectonic parameter b-value spatially and temporally to determine the accumulation of tectonic stress in Yogyakarta. The method used is a frequency-magnitude distribution with Gutenberg-Richter relation and Maximum Likelihood approach. Earthquake data were obtained from ISC and BMKG catalogs, with a total of 205 events. The results show that spatially, the b-value of the Yogyakarta region is generally low with a range of values of 0.35 - 0.75 using a grid of 1.5 x 1.5 km and a radius of 15 km with low values around the Opak fault and Ngalang Fault, meaning that the area still holds a high accumulation of stress energy and has the potential for large earthquakes to occur again in the future. Temporal analysis of the b-value shows a tendency for the b-value to decrease before a large earthquake and increase afterwards, reflecting the accumulation and release of stress in the rock.

References

BAPPENAS (2006). Penilaian Awal Kerusakan dan Kerugian Bencana Alam di Yogyakarta dan Jawa Tengah. Laporan bersama BAPPENAS, Pemerintahan Provinsi dan D.I.Yogyakarta, Pemerintahan Provinsi dan Daerah Jawa Tengah, dan Mitra International.

BMKG (2016). Catatan Gempabumi Yogyakarta 10 Tahun Terakhir. Diakses pada 10 Juli 2024, InfoBMKG www.bmkg.go.id.

BMKG (2018). Katalog Gempabumi Signifikan dan Merusak 1821 – 2017. Pusat Gempabumi dan Tsunami Badan Meteorologi, Klimatologi, dan Geofisika.

Godano, C., Lippiello, E. & de Arcangelis, L. (2014). Variability of the b-value in the Gutenberg-Richter distribution. Geophysical Journal International, 199 (3), 1765- 1771.

Hamilton, W. (1988). Plate Tectonics and Island Arcs. Geological Society of America Bull, 100, 1503–1527.

Hanafi, R., Dewi, I., & Ngatijo, N. (2024). Pemetaan Magnitude Of Completeness (Mc) Untuk Gempa Di Wilayah Bengkulu. JGE (Jurnal Geofisika Eksplorasi), 10(2), 121-138. doi:https://doi.org/10.23960/jge.v10i2.250

Lay, T. & Wallace, T. C. (1995). Modern Global Seismology. San Diego: Academic Press.

Librian, V., Ramdhan, M., Nugraha, A. D., Mukti, M. M., Syuhada, S., Lühr, B.-G., Widiyantoro, S., Mursitantyo, A., Anggraini, A., Zulfakriza, Z., Muttaqy, F., & Husni, Y. M. (2024). Detailed Seismic Structure Beneath the Earthquake Zone of Yogyakarta 2006 (Mw ∼6.4), Indonesia, from local earthquake tomography. Physics of the Earth and Planetary Interiors, 351, 107170. doi: 10.1016/j.pepi.2024.107170.

Nuannin, P. (2006). The Potential ff B-Value Variations as Earthquake Precursors for Small and Large Events (Doctoral dissertation, Acta Universitatis Upsaliensis).

Prananda, Y., Zera, T., & Sunarya, D. (2022). Analisis Distribusi Spasial Dan Temporal Parameter Seismotektonik Wilayah Jawa Barat Dan Banten Berdasarkan A-Value dan B-Value Periode 1971-2021. Buletin Meteorologi, Klimatologi, dan Geofisika, 2(3), 24 – 34.

Prawirodikromo, W. (2012). Seismologi Teknik dan Rekayasa Kegempaan. Yogyakarta: Pustaka Pelajar.

Rydelek, P.A, & I. Selwyn, S. (1989). Testing The Completeness of Earthquaku Catalogues and The Hypothesis of Self-Similarity. Nature, 337, 251-253.

Rohadi, S. (2009). Studi Seismotektonik Sebagai Indikator Potensi Gempabumi di Wilayah Indonesia. Jurnal Meteorologi dan Geofisika, 10(2), 111-120.

Rohadi, S., Grandis, H., & Ratag, M. A. (2007). Studi Variasi Spatial Seismisitas Zona Subduksi Jawa. Jurnal Meteorologi dan Geofisika, 8(1), 42 – 47.

Surono, Toha, B., & Sudarno, I. (1998). Geological Map of Surakarta-Giritontro Quadrangle, Java, Scale 1: 100,000. Bandung, Indonesia.

Taruna, R.M. & Pratiwi, A. (2021). Konversi Empiris Summary Magnitude, Local Magnitude, Body-Wave Magnitude, Surface Magnitude, dan Moment Magnitude Menggunakan Data Gempabumi 1922-2020 di Nusa Tenggara Barat. Jurnal Sains teknologi & Lingkungan, 7(1), 1 – 12.

Wiemer, S. & Wyss, M. (1997). Mapping The Frequency-Magnitude Distribution In Asperities: An Improved Technique To Calculate Recurrence Times. Journal of Geophysical Research, vol 102, 15115-15128.

Wiemer, S., & Wyss, M. (2000). Minimum Magnitude of Completeness in Earthquake Catalog; Examples from Alaska, the Western US and Japan. BSSA., 90(4), 859-869.

Wiemer, S., & Wyss, M. (2002). Mapping Spatial Variability of The Frequency-Magnitude Distribution of Earthquakes. Advances In Geophysics, 45, 259 – 302.

Zakhra, V., Styawan, Y., Fattah, E., & Farduwin, A. (2023). Analisis Gempa Cianjur 2022 Dengan Pendekatan Spasial Temporal A-Value Dan B-Value. JGE (Jurnal Geofisika Eksplorasi), 9(3), 217-230. doi:https://doi.org/10.23960/jge.v9i3.318

Zulkifli, R., Muhardi, M., & Perdhana, R. (2024). Analisis Struktur Geologi Bawah Permukaan Di Kabupaten Sleman Berdasarkan Anomali Data Gravitasi. JGE (Jurnal Geofisika Eksplorasi), 10(2), 162-173. doi:https://doi.org/10.23960/jge.v10i2.326

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Published

2024-11-30

How to Cite

R, S. R., & Madrinovella, I. (2024). SPATIAL AND TEMPORAL B-VALUE ANALYSIS OF THE YOGYAKARTA REGION USING EARTHQUAKE DATA 1960 – 2024. JGE (Jurnal Geofisika Eksplorasi), 10(3), 191–203. https://doi.org/10.23960/jge.v10i3.468

Issue

Vol. 10 No. 3 (2024)

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