Publication Date:
2017-04-04
Description:
Previous and new results from probabilistic approaches based on available
volcanological data from real eruptions of Campi Flegrei, are assembled in a comprehensive
assessment of volcanic hazards at the Campi Flegrei caldera, in order to compare the volcanic
hazards related to the different types of events. Hazard maps based on a very wide set of
numerical simulations, produced using field and laboratory data as input parameters relative
to the whole range of fallout and pyroclastic-flow events and their relative occurrence,
are presented. The results allow us to quantitatively evaluate and compare the hazard
related to pyroclastic fallout and density currents (PDCs) in the Campi Flegrei area and its
surroundings, including the city of Naples.
Due to the dominant wind directions, the hazard from fallout mostly affects the area east of
the caldera, and the caldera itself, with the level of probability and expected thickness decreasing
with distance from the caldera and outside the eastern sectors. The hazard from PDCs
decrease roughly radially with distance from the caldera centre and is strongly controlled by
the topographic relief, which produces an effective barrier to propagation of PDCs to the east
and northeast, areas which include metropolitan Naples. The main result is that the metropolitan
area of Naples would be directly exposed to both fallout and PDCs. Moreover, the
level of probability for critical tephra accumulation by fallout is relatively high, even for
moderate-scale events, while, due to the presence of topographic barriers, the hazard from
PDCs is only moderate and mostly associated with the largest events.
Description:
Published
Description:
159-171
Description:
open
Keywords:
NONE
;
04. Solid Earth::04.08. Volcanology::04.08.08. Volcanic risk
Repository Name:
Istituto Nazionale di Geofisica e Vulcanologia (INGV)
Type:
article
Format:
465296 bytes
Format:
application/pdf
Permalink
