Investigation of Liquefaction in Balaroa, Petobo, and Jonooge (Central Sulawesi, Indonesia) Caused by the 2018 Palu Earthquake Sequence

Rahmat Triyono; Sri Widiyantoro; Zulfakriza Zulfakriza; Pepen Supendi; Aditya Setyo Rahman; Mohamad Taufik Gunawan; Nur Hidayati Oktavia; Fajri Syukur Rahmatullah; Fildzah Zaniati Fadhilah; Nur Fani Habibah; Oriza Sativa; Dadang Permana; Robby Wallansha; Ardian Yudhi Octantyo; Yoga Dharma Persada; Bayu Pranata; Sujabar Sujabar

doi:10.5614/j.eng.technol.sci.2024.56.3.1

Authors

Rahmat Triyono
rahmat.triyono@gmail.com
Indonesian Agency of Meteorology Climatology and Geophysics, Jalan Angkasa 1 No. 2, Jakarta 10610, Indonesia , Indonesia
Sri Widiyantoro Faculty of Engineering, Maranatha Christian University, Jalan Prof. drg. Surya Sumantri, M.P.H. No. 65, Bandung 40164, Indonesia, Indonesia
Zulfakriza Global Geophysics Research Group, Faculty of Mining and Petroleum Engineering, Institut Teknologi Bandung, Jalan Ganesa No. 10, Bandung 40132, Indonesia, Indonesia
Pepen Supendi Department of Earth Sciences - Bullard Laboratories, University of Cambridge, Madingley Road, Cambridge CB30EZ, United Kingdom , Indonesia
Aditya Setyo Rahman Indonesian Agency of Meteorology Climatology and Geophysics, Jalan Angkasa 1 No. 2, Jakarta 10610, Indonesia , Indonesia
Mohamad Taufik Gunawan Indonesian Agency of Meteorology Climatology and Geophysics, Jalan Angkasa 1 No. 2, Jakarta 10610, Indonesia , Indonesia
Nur Hidayati Oktavia Indonesian Agency of Meteorology Climatology and Geophysics, Jalan Angkasa 1 No. 2, Jakarta 10610, Indonesia , Indonesia
Fajri Syukur Rahmatullah Indonesian Agency of Meteorology Climatology and Geophysics, Jalan Angkasa 1 No. 2, Jakarta 10610, Indonesia , Indonesia
Fildzah Zaniati Fadhilah Indonesian Agency of Meteorology Climatology and Geophysics, Jalan Angkasa 1 No. 2, Jakarta 10610, Indonesia , Indonesia
Nur Fani Habibah Indonesian Agency of Meteorology Climatology and Geophysics, Jalan Angkasa 1 No. 2, Jakarta 10610, Indonesia , Indonesia
Oriza Sativa Indonesian Agency of Meteorology Climatology and Geophysics, Jalan Angkasa 1 No. 2, Jakarta 10610, Indonesia , Indonesia
Dadang Permana Indonesian Agency of Meteorology Climatology and Geophysics, Jalan Angkasa 1 No. 2, Jakarta 10610, Indonesia , Indonesia
Robby Wallansha Indonesian Agency of Meteorology Climatology and Geophysics, Jalan Angkasa 1 No. 2, Jakarta 10610, Indonesia , Indonesia
Ardian Yudhi Octantyo Indonesian Agency of Meteorology Climatology and Geophysics, Jalan Angkasa 1 No. 2, Jakarta 10610, Indonesia , Indonesia
Yoga Dharma Persada Indonesian Agency of Meteorology Climatology and Geophysics, Jalan Angkasa 1 No. 2, Jakarta 10610, Indonesia , Indonesia
Bayu Pranata Indonesian Agency of Meteorology Climatology and Geophysics, Jalan Angkasa 1 No. 2, Jakarta 10610, Indonesia , Indonesia
Sujabar Indonesian Agency of Meteorology Climatology and Geophysics, Jalan Angkasa 1 No. 2, Jakarta 10610, Indonesia , Indonesia

Vol. 56 No. 3 (2024)

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Published June 19, 2024

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The liquefaction that occurred in the city of Palu on September 28, 2018, was caused by a series of significant earthquakes that took place in a relatively short time around 25 minutes after the main earthquake of magnitude 7.5. This event was followed by aftershocks of magnitudes 6.4, 6.2, and 6.1. The magnitude 6.2 aftershock occurred at 10.16 UTC, while the magnitude 6.1 aftershock occurred at 10.25 UTC. These were both located very close to the liquefaction locations in Balaroa, Petobo, and Jono Oge. We investigated the mainshock and the three aftershocks using the NCEER method based on Vs30 measurements and data from the drill liquefaction locations at Balaroa, Petobo, and Jono Oge. We found that the liquefaction was not only caused by the main earthquake but also by the subsequent aftershocks that occurred within 25 minutes after the mainshock.

Triyono, R., Widiyantoro, S., Zulfakriza, Z., Supendi, P., Rahman, A. S., Gunawan, M. T., Oktavia, N. H., Rahmatullah, F. S., Fadhilah, F. Z., Habibah, N. F., Sativa, O., Permana, D., Wallansha, R., Octantyo, A. Y., Persada, Y. D., Pranata, B., & Sujabar, S. (2024). Investigation of Liquefaction in Balaroa, Petobo, and Jonooge (Central Sulawesi, Indonesia) Caused by the 2018 Palu Earthquake Sequence. Journal of Engineering and Technological Sciences, 56(3), 317–328. https://doi.org/10.5614/j.eng.technol.sci.2024.56.3.1

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