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Properties of the aftershocks sequences of the 2000 and 2002 earthquakes in Aksehir-Afyon graben, west-central Anatolia, Turkey

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  • Naside Ozer
  • Yildiz Altinok
  • Savas Ceylan

Abstract

The b-value of the Gutenberg–Richter’s frequency–magnitude relation and the p-value of the modified Omori law, which describes the decay rate of aftershock activity, were investigated for more than 500 aftershocks in the Aksehir-Afyon graben (AAG) following the 15 December 2000 Sultandagi–Aksehir and the 3 February 2002 Çay–Eber and Çobanlar earthquakes. We used the Kandilli Observatory’s catalog, which contains records of aftershocks with magnitudes ≥2.5. For the Çobanlar earthquake, the estimated b-values for three aftershock sequences are in the range 0.34 ≤ b ≤ 2.85, with the exception of the one that occurred during the first hour (4.77), while the obtained p-values are in the range 0.44 ≤ p ≤ 1.77. The aftershocks of the Sultandagi earthquake have a high p-value, indicating fast decay of the aftershock activity. A regular increase of b can be observed, with b > 1.0 after 0.208 days for the Çay–Eber earthquake. A systematic and similar increase and decrease pattern exists for the b- and p-values of the Çobanlar earthquakes during the first 5 days. Copyright Springer Science+Business Media B.V. 2007

Suggested Citation

  • Naside Ozer & Yildiz Altinok & Savas Ceylan, 2007. "Properties of the aftershocks sequences of the 2000 and 2002 earthquakes in Aksehir-Afyon graben, west-central Anatolia, Turkey," Natural Hazards: Journal of the International Society for the Prevention and Mitigation of Natural Hazards, Springer;International Society for the Prevention and Mitigation of Natural Hazards, vol. 40(3), pages 553-562, March.
    • Handle: RePEc:spr:nathaz:v:40:y:2007:i:3:p:553-562
    DOI: 10.1007/s11069-006-9019-8
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    Cited by:

    1. Saman Yaghmaei-Sabegh & Hongwei Wang, 2022. "Aftershock ground motion characteristics during the 2012 Varzaghan–Ahar doublet events, northwest of Iran," Natural Hazards: Journal of the International Society for the Prevention and Mitigation of Natural Hazards, Springer;International Society for the Prevention and Mitigation of Natural Hazards, vol. 111(3), pages 2579-2599, April.

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