Journal cover Journal topic
Natural Hazards and Earth System Sciences An interactive open-access journal of the European Geosciences Union
Nat. Hazards Earth Syst. Sci., 15, 409-415, 2015
http://www.nat-hazards-earth-syst-sci.net/15/409/2015/
doi:10.5194/nhess-15-409-2015
© Author(s) 2015. This work is distributed
under the Creative Commons Attribution 3.0 License.
Brief communication
04 Mar 2015
Brief Communication: The effect of submerged vents on probabilistic hazard assessment for tephra fallout
R. Tonini1, L. Sandri2, A. Costa2, and J. Selva2 1Istituto Nazionale di Geofisica e Vulcanologia, Sezione di Roma 1, Rome, Italy
2Istituto Nazionale di Geofisica e Vulcanologia, Sezione di Bologna, Bologna, Italy
Abstract. Many volcanic systems are partially or entirely submerged, implying that vents may open underwater. The effect of submerged vents on probabilistic volcanic hazard assessment (PVHA) for tephra fallout has always been neglected, introducing potentially uncontrolled biases. We present a strategy to quantify the effect of submerged vents on PVHA for tephra fallout, based on a simplified empirical model in which the efficiency of tephra production decreases as a function of the water depth above the eruptive vent. The method is then applied to Campi Flegrei caldera, comparing its results to those of two reference end-member models and their statistical mixing.

Citation: Tonini, R., Sandri, L., Costa, A., and Selva, J.: Brief Communication: The effect of submerged vents on probabilistic hazard assessment for tephra fallout, Nat. Hazards Earth Syst. Sci., 15, 409-415, doi:10.5194/nhess-15-409-2015, 2015.
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