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Seismic coda Q and turbidity coefficient at the Phlegraean Fields volcanic area: Preliminary results

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Abstract

Digital recordings of microearthquake codas from shallow seismic events in the Phlegraean Fields region (south-central Italy) were used to calculate the attenuation factor Qc.

A quite unusual frequency dependence was found for the coda attenuation comparable to Hawaii pattern of Qc. This is interpreted as due to the presence of magma that increases the amount of anelasticity. Amount of scattering at Phlegraean Fields was estimated through the « turbidity » coefficient (Dainty model), that shows a high degree of scattering due to inhomogeneities as compared to Hawaii. Probably this is due to the greater crustal thickness of Phlegraean Fields with respect to Hawaii that produces more scattering.

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Authors and Affiliations

  1. Osservatorio Vesuviano, 80056, Ercolano (Napoli), Italy

    M. Castellano, E. Del Pezzo, G. De Natale & A. Zollo

Authors
  1. M. Castellano
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  2. E. Del Pezzo
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  3. G. De Natale
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  4. A. Zollo
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Castellano, M., Del Pezzo, E., De Natale, G. et al. Seismic coda Q and turbidity coefficient at the Phlegraean Fields volcanic area: Preliminary results. Bull Volcanol 47, 219–224 (1984). https://doi.org/10.1007/BF01961551

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  • DOI: https://doi.org/10.1007/BF01961551

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