Akademik Veri Yönetim Sistemi
ARABIAN JOURNAL OF GEOSCIENCES, cilt.15, sa.23, ss.1-10, 2022 (SCI-Expanded)
The Lombok island is a part of the Sunda Arc, tectonically controlled by the subduction system of the Indo-Australian Plate in the southern part while the Flores thrust in the northern part. A sequence of major earthquakes consisting of Mw 5.9-6.9 struck in July-August 2018 and generated massive loss and damage in the Lombok and neighboring regions. In the current study, we analyzed the seismicity clustering of this series of shallow earthquakes including the seismic data from 2009 to 2021. We applied the logarithmic transformation of the nearest-neighborhood distance (log10η) for the seismic data within the domain of space (magnitude), time (magnitude), and depth (magnitude). The combined relationship between these factors has been estimated, which showed that the seismicity in Lombok island was prominently unimodal and indicates the existence of a single type of statistically distribute earthquake. These relationships also point out a contribution of space, time, and depth around 32.410%, 54.447%, and 13.143% respectively. Later we utilized the Welch power spectrum analysis for log10η and analyzed the performance and complexity of the seismicity. The analysis clearly showed the highest peak that was corresponding to the frequency of series earthquake distribution from 25 July to 8 August 2018.