Download PDF by Andrea Bevilacqua: Doubly Stochastic Models for Volcanic Hazard Assessment at

By Andrea Bevilacqua

ISBN-10: 887642556X

ISBN-13: 9788876425561

ISBN-10: 8876425772

ISBN-13: 9788876425776

This learn offers cutting edge mathematical versions for assessing the eruption likelihood and linked volcanic risks, and applies them to the Campi Flegrei caldera in Italy. during the publication, major recognition is dedicated to quantifying the resources of uncertainty affecting the forecast estimates.

The Campi Flegrei caldera is definitely one of many world’s highest-risk volcanoes, with greater than 70 eruptions during the last 15,000 years, prevalently explosive ones of various value, depth and vent position. within the moment 1/2 the 20th century the volcano it seems that once more entered a part of unrest that maintains to the current. millions of individuals stay contained in the caldera and over 1000000 extra within the within sight urban of Naples, creating a destiny eruption of Campi Flegrei an occasion with in all likelihood catastrophic effects on the nationwide and ecu levels.

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Additional info for Doubly Stochastic Models for Volcanic Hazard Assessment at Campi Flegrei Caldera

Sample text

Modified from [17]. fected by significant uncertainty with credible intervals ranging between about 8% and 27% for faults and between about 5% and 20% for fractures. Finally, a mean weight of about 25% was assigned to the homogeneous whole-caldera spatial distribution, with credible interval between about 6 and 42%. 6 represents the densities of the uncertainty spreads for the single weights as well as the central value weights obtained directly from the elicitation, represented as coloured dots along the x axis.

5b, d), are strictly maps of maximum fault dislocation and surface fracture density, respectively, this meaning that their contributions to the probability of vent opening are greater where net dislocations and densities are greater. An alternative uniform distribution over the whole caldera area was also adopted to represent the possibility there may be no correlation between the vent opening distribution and the five variables considered here. Several elicitation sessions, involving about 8-10 experts with different volcanological backgrounds, were carried out during the three-year long study through meetings and remote consultations.

However, in both cases the highest probabilities were found in the Astroni area. Outside this higher probability central area, probability of vent opening is quite dispersed with secondary maxima in the zone of Soccavo, in the eastern part of the caldera, and in the zones of Averno-Monte NuovoBaia-Capo Miseno, in the western part. 2%; in the western part of the caldera they reach 1% (as mean values). 5%. 3 we report the estimates of vent opening probability distribution integrated over each of the sixteen zones of the caldera, computed using the caldera partitioning and the kernel functions, and by adopting the CM, ERF and EW models.

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Doubly Stochastic Models for Volcanic Hazard Assessment at Campi Flegrei Caldera by Andrea Bevilacqua

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