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Achmad Fajar Narotama Sarjan
University Of Mataram
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Journal : Lambda: Jurnal Ilmiah Pendidikan MIPA dan Aplikasinya

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Spatiotemporal analysis of Seismicity Parameters (a- and b-values) for Earthquake Disaster Mitigation: A case study of the 2018 Lombok Earthquake, Indonesia Sarjan, Achmad Fajar Narotama
Lambda: Jurnal Ilmiah Pendidikan MIPA dan Aplikasinya Vol. 5 No. 3 (2025): Oktober
Publisher : Lembaga Bale Literasi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58218/lambda.v5i3.1837

Abstract

This study analyzes the seismicity parameters of Lombok Island using ZMAP 7.1 to better understand the region’s earthquake characteristics. The results indicate a high level of seismic activity, with an a-value of 10.257 and an annual a-value of 8.743, corresponding to an average of approximately nine earthquakes per year. The calculated b-value of 1.58 ± 0.07 also reflects high seismicity, suggesting that rocks in the study area have a limited capacity to withstand stress and store energy, thereby favoring the occurrence of low-magnitude events. Conversely, zones with lower b-values are relatively stronger and capable of generating higher-magnitude earthquakes. The predominance of moderate to high b-values across Lombok Island indicates that much of the accumulated energy was released during the 2018 earthquake sequence associated with the Flores back-arc thrust.
Co-Authors Agastya, Dewandha Mas Agustawijaya , Didi Supriyadi Agustono Setiawan Aluh Nikmatullah Andri Dian Nugraha Aryani Rofaida Billy S Prabowo Budastra, Wayan Cintya Ganes David Prambudi Sahara Desi Widianty Dewi, Evrianti Syntia Dewi, Meilinda Kemala Didi Supriyadi Agustawijaya Eniarti, Miko Fera Fitri Salsabila Fera Fitri Salsabila Hasyim Hery Haryanto Ida Ayu Oka Suwati Sideman Ismail Hoesain Muchtaranda Jauhar Fajrin, Jauhar Kisman Kisman Mahendra, Made Moh. Taufik Fauzi Muchtaranda, Ismail Hoesain Muchtaranda, Ismail Hoesein Muhajirah Muhajirah, Muhajirah Muhammad Randy Caesario Harsuko Muhammad Sarjan Muhammad Sarjan Muzli Muzli Nanang T Puspito Raissilki, Muhammad Iqbal Rassy, Regania Pasca Ratna Yuniarti Rizaldi, Lalu Heri Ruth Stella Petrunella Thei Ruth Stella Petrunella Thei Salsabila, Fera Fitri Septiyan , Arsy SEPTIYAN, ARSY Supriadi Supriadi Tri Sulistyowati Yayan M Husni Z. Zulfakriza