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<p>In this research, we used the 2006–2024 seismic catalog from the Iranian Seismological Center for a comprehensive analysis of the seismicity parameters (<i>b</i> -value, the magnitude of completeness (<i>M</i><sub><i>C</i></sub>), Fractal Dimension (<i>D</i><sub><i>C</i></sub>), Seismic Moment (M<sub>0</sub>), and seismic quiescence (<i>Z</i> -value)) in the vicinity of Mw 6.2 Murmuri Earthquake of August 18, 2014, in the Zagros region of Iran. The <i>M</i><sub><i>C</i></sub> exhibits spatial heterogeneity, with values ranging from 2.0–2.5 near Dehloran to 3.0–3.5 near the Mountain Front Fault (M.F.F.), reflecting detection challenges in complex fault zones. Spatial <i>b</i> -value distribution indicates low values near the mainshock epicenter and M.F.F., suggesting high-stress accumulation. The <i>D</i><sub><i>C</i></sub> -value shows higher values near the epicenter, reflecting clustered seismicity. An orthogonal regression analysis reveals a strong negative correlation (r = -0.71) between b-value and <i>D</i><sub><i>C</i></sub> -value in the region. The <i>Z</i> -value distribution in early 2014, using a 2-year time window, identifies significant quiescence near the epicenter, a precursor to the mainshock, transitioning to post-event activation. The spatial distribution of <i>Z</i> -values exhibits a complex pattern, with lower values (z ≈ − 1.0 to − 1.5) concentrated near the Murmuri epicenter, indicating a moderate decrease in seismic activity relative to the reference period. These findings highlight the M.F.F. as a high-hazard zone, with integrated parameter analysis enhancing precursory detection and post-event stress mapping.</p>

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Spatial –temporal variations of seismicity parameters in vicinity of Mw 6.2 murmuri earthquake region in Zagros, Iran, on August 18, 2014

  • 期刊论文

  • 发表日期：

    2025年12月13日

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  • Muhammed Hossein Mousavi,
  • Parva Sadeghi Alavijeh,
  • Amir Talebi

摘要

In this research, we used the 2006–2024 seismic catalog from the Iranian Seismological Center for a comprehensive analysis of the seismicity parameters (b -value, the magnitude of completeness (MC), Fractal Dimension (DC), Seismic Moment (M0), and seismic quiescence (Z -value)) in the vicinity of Mw 6.2 Murmuri Earthquake of August 18, 2014, in the Zagros region of Iran. The MC exhibits spatial heterogeneity, with values ranging from 2.0–2.5 near Dehloran to 3.0–3.5 near the Mountain Front Fault (M.F.F.), reflecting detection challenges in complex fault zones. Spatial b -value distribution indicates low values near the mainshock epicenter and M.F.F., suggesting high-stress accumulation. The DC -value shows higher values near the epicenter, reflecting clustered seismicity. An orthogonal regression analysis reveals a strong negative correlation (r = -0.71) between b-value and DC -value in the region. The Z -value distribution in early 2014, using a 2-year time window, identifies significant quiescence near the epicenter, a precursor to the mainshock, transitioning to post-event activation. The spatial distribution of Z -values exhibits a complex pattern, with lower values (z ≈ − 1.0 to − 1.5) concentrated near the Murmuri epicenter, indicating a moderate decrease in seismic activity relative to the reference period. These findings highlight the M.F.F. as a high-hazard zone, with integrated parameter analysis enhancing precursory detection and post-event stress mapping.