Articles | Volume 22, issue 10
Nat. Hazards Earth Syst. Sci., 22, 3329–3348, 2022
https://doi.org/10.5194/nhess-22-3329-2022
Nat. Hazards Earth Syst. Sci., 22, 3329–3348, 2022
https://doi.org/10.5194/nhess-22-3329-2022
Research article
14 Oct 2022
Research article | 14 Oct 2022

Assessing minimum pyroclastic density current mass to impact critical infrastructures: example from Aso caldera (Japan)

Andrea Bevilacqua et al.

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Cited articles

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Aoki, K.: Revised age and distribution of ca. 87 ka Aso-4 tephra based on new evidence from the northwest Pacific Ocean, Quatern. Int., 178, 100–118, https://doi.org/10.1016/j.quaint.2007.02.005, 2008. 
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Aravena, A., Cioni, R., Bevilacqua, A., de' Michieli Vitturi, M., Esposti Ongaro, T., and Neri, A.: Tree-branching-based enhancement of kinetic energy models for reproducing channelization processes of pyroclastic density currents, J. Geophys. Res.-Solid, 125, e2019JB019271, https://doi.org/10.1029/2019JB019271, 2020. 
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We evaluate through first-order kinetic energy models, the minimum volume and mass of a pyroclastic density current generated at the Aso caldera that might affect any of five distal infrastructure sites. These target sites are all located 115–145 km from the caldera, but in well-separated directions. Our constraints of volume and mass are then compared with the scale of Aso-4, the largest caldera-forming eruption of Aso.
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