Estimating Aftershock Termination Time Using Statistical Decay Models: A Case Study of the March 22, 2024 Bawean Earthquake

Martha Rajagukguk; Rayhan Irfan Hielmy

doi:10.63581/JoCPES.v5i2.10

Authors

Martha Rajagukguk Undergraduate Program in Applied of Geophysics (STMKG) Author
Rayhan Irfan Hielmy Undergraduate Program in Applied of Geophysics (STMKG) Author

DOI:

https://doi.org/10.63581/JoCPES.v5i2.10

Keywords:

Bawean Earthquake , Bawean Earthquake, Aftershoocks , Aftershock, Omori , Omori, Mogi, Mogi, Utsu, Utsu

Abstract

An earthquake struck Bawean Island on March 22, 2024 with a magnitude of 6.5 followed by a series of aftershocks. In this study, the decay of aftershocks in the Bawean region was analyzed from March 22 to March 31, 2024 using the Omori Method, Mogi I Method, Mogi II Method, and Utsu Method. The purpose of this research is to determine the duration of aftershock decay in Bawean and to identify the most suitable statistical method for predicting aftershock decay time in the region. The analyzed data were obtained from the BMKG earthquake repository. By applying the four methods, results were obtained in the form of aftershock decay duration and correlation coefficients for each method. The analysis shows that the most appropriate statistical methods for calculating aftershock decay time in Bawean are the Mogi I Method and the Utsu Method both producing a correlation coefficient of approximately -0.806 and an aftershock decay duration of 24 days consistent with the BMKG earthquake catalog data.

Author Biographies

Martha Rajagukguk, Undergraduate Program in Applied of Geophysics (STMKG)

Undergraduate student, Geophysics Study Program, State College of Meteorology Climatology and Geophysics (STMKG), Indonesia.
Rayhan Irfan Hielmy, Undergraduate Program in Applied of Geophysics (STMKG)

Undergraduate student, Geophysics Study Program, School of Meteorology, Climatology, and Geophysics (STMKG), Indonesia.

References

N. N. Faiza, A. Mukti Wibowo, and R. Fatimah, “ANALISIS METODE WAKTU PELURUHAN GEMPA BUMI SUSULAN BERDASARKAN METODE OMORI, MOGI DAN UTSU (STUDI KASUS GEMPA BUMI PASAMAN BARAT 25 FEBRUARI 2022),” vol. 08, no. 02, pp. 65–72, 2024, [Online]. Available: https://doi.org/10.24198/jiif.v8i2

D. A. Pramadhana, “ANALYSIS OF AFTERSHOCK METHODS IN KARANGASEM BASED ON THE KARANGASEM EARTHQUAKE Mw 5 , 2 2022,” Bul. Meteorol. Klimatologi Dan Geofis., vol. 4, no. 6, pp. 44–52, 2023, [Online]. Available: https://balai2bmkg.id/index.php/buletin_mkg/article/view/67

X. Yang, S. C. Singh, and A. Tripathi, “Did the Flores backarc thrust rupture offshore during the 2018 Lombok earthquake sequence in Indonesia?,” Geophys. J. Int., vol. 221, no. 2, pp. 758–768, 2020, doi: 10.1093/gji/ggaa018.

P. Maulida, R. Putra, and A. Kurniawan, “Studi Pergeseran Koseismik Gempa Pasaman M6.1 2022 Menggunakan Data Pengamatan GPS harian,” Geoid, vol. 18, no. 1, p. 176, 2022, doi: 10.12962/j24423998.v18i1.14410.

K. Salsabil A., R. A. Ginting, Q. A., and M. Kamal A., “Analisis Peluruhan Gempa Bumi Menggunakan Metode Omori,Mogi-Utsu I Dan Mogi-Utsu Ii (Studi Kasus Gempa Bumi Banten 23 Januari 2018),” vol. VIII, pp. SNF2019-PA-7–14, 2019, doi: 10.21009/03.snf2019.02.pa.02.

H. Syarifuddin and P. Ariyanto, “Analisis Perkiraan Waktu Berakhirnya Gempabumi Susulan Pada Gempabumi M 5.4 Jayapura 2 Januari 2023,” Bul. Meteorol. Klimatlogi dan Geofis., vol. 4, no. 5, pp. 46–53, 2023, [Online]. Available: https://repogempa.bmkg.go.id/eventca

Y. Januarti and P. Ariyanto, “Analisis Peluruhan Gempabumi Susulan di Selat Sunda Pada Tanggal 23 Mei 2021,” Semin. Nas. FIisika 2021, pp. 97–102, 2021, [Online]. Available: https://fisika.fmipa.unesa.ac.id/proceedings/index.php/snf/article/view/179/158

A. Vellicia, K. Suarbawa, and R. Darsono, “Penentuan Asumsi Waktu Berakhirnya Gempa Susulan Studi Kasus Gempabumi Lombok 5 Agustus 2018,” Kappa J., vol. 3, no. 2, pp. 99–104, 2019, doi: 10.29408/kpj.v3i2.1609.

R. Yulinda, L. Nisa, I. Ilham, and J. Purba, “The Relocation Of Bawean Earthquake Aftershock Using Double Difference Method,” J. Rekayasa Geofis. Indones., vol. 7, no. 01, pp. 013–025, 2025, doi: 10.56099/jrgi.v7i01.147.

D. A. Pramadhana, B. H. P. P. Putra, and M. Syirojudin, “STUDI PEMETAAN SESAR REMBANG-MADURA-KANGEAN-SAKALA TURUNAN,” vol. 10, no. 1, pp. 51–62, 2024.

M. Asrurifak, I. M., B. B., T. W., and Hendriyawan, “Development of Spectral Hazard Map for Indonesia with a Return Period of 2500 Years using Probabilistic Method,” vol. 12, no. 1, pp. 52–62, 2010.

A. A. Justiono, E. Rahmadi, and R. Fadly, “Analisis Pergeseran Horisontal Akibat Gempa Bawean 22 Maret 2024 Menggunakan Pengamatan GPS Kontinu,” vol. 7, no. 2024, pp. 181–185, 2025.

T. Utsu, Y. Ogata, and R. S. Matsu’ura, “The Centenary a Decay of the Omori Formula Activity for Law of Aftershock Tokuji Utsu ,* Yosihiko Ogata , and Ritsuko S . Matsu ’ ura,” pp. 1–33, 1995.

E. Asanti, D. B. Susanti, L. Silfia, and P. Boli, “Analisis Waktu Berakhirnya Gempa Bumi Susulan Menggunakan Metode Mogi II dan Utsu (Studi Kasus Gempa Bumi Bantul 30 Juni 2023),” J. Stasiun Geofis. Sleman, vol. 2, no. 1, pp. 27–32, 2024.

V. M. Zakhra, Y. Styawan, E. I. Fattah, and F. Alhada, “Analisis Gempa Cianjur 2022 dengan Pendekatan Spasial Temporal a-Value dan b-Value,” J. Geofis. Eksplor., vol. 09, pp. 217–230, 2023.

I. I. Pertiwi, “Analisis Statistik Distribusi Kejadian Gempabumi Di Luwu Timur, Morowali, Dan Morowali Utara, Sulawesi,” vol. 20, no. 01, 2022.