Analisis Variasi Spasial a- dan b-Value Sebagai Indikator Kegempaan di Wilayah Nusa Tenggara bagian Timur
DOI:
https://doi.org/10.29303/goescienceed.v6i4.1382Keywords:
Eastern Nusa Tenggara, Earthquake, Seismotectonics, a-value, b-value, ZMAPAbstract
Eastern Nusa Tenggara, encompassing Timor, Flores, Alor, and Kupang City, lies along the active collision zone between the Indo-Australian and Eurasian plates, making the region highly susceptible to earthquakes. This study analyzes the spatial variation of a-value and b-value based on the earthquake catalog from 1998–2023 using ZMAP v.6.0 software. The frequency–magnitude distribution (FMD) curve indicates an inverse relationship between earthquake frequency and magnitude. Spatially, relatively high b-values are observed in eastern Flores to Alor, indicating frequent seismic activity with low released energy, while the variation of a-value reflects the level of seismicity, ranging from 5.0–6.0, with b-values between 0.8–1.1. These findings provide valuable insights for disaster mitigation, infrastructure planning, and enhancing community preparedness in Eastern Nusa Tenggara, including Kupang City.
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