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Authors: Costa, A.*
Dell’Erba, F.*
Di Vito, M. A.*
Isaia, R.*
Macedonio, G.*
Orsi, G.*
Pfeiffer, T.*
Title: Tephra fallout hazard assessment at the Campi Flegrei caldera (Italy)
Title of journal: Bull Volcanol
Series/Report no.: /(2008)
Publisher: Springer-Verlag
Issue Date: 2008
DOI: 10.1007/s00445-008-0220-3
Keywords: Tephra fallout hazard
Tephra loading
Campi Flegrei caldera
Abstract: Tephra fallout associated with renewal of volcanism at the Campi Flegrei caldera is a serious threat to the Neapolitan area. In order to assess the hazards related with tephra loading, we have considered three different eruption scenarios representative of past activity: a high-magnitude event similar to the 4.1 ka Agnano-Monte Spina eruption, a medium-magnitude event, similar to the ∼3.8 ka Astroni 6 eruption, and a low-magnitude event similar to the Averno 2 eruption. The fallout deposits were reconstructed using the HAZMAP computational model, which is based on a semi-analytical solution of the two-dimensional advection– diffusion–sedimentation equation for volcanic tephra. The input parameters into the model, such as total erupted mass, eruption column height, and bulk grain-size and components distribution, were obtained by best-fitting field data. We carried out tens of thousands simulations using a statistical set of wind profiles, obtained from NOAA reanalysis. Probability maps, relative to the considered scenarios, were constructed for several tephra loads, such as 200, 300 and 400 kg/m2. These provide a hazard assessment for roof collapses due to tephra loading that can be used for risk mitigation plans in the area.
Appears in Collections:05.02.99. General or miscellaneous
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