TY - JOUR
T1 - Numerical inversion and analysis of tephra fallout deposits from the 472 AD sub-Plinian eruption at Vesuvius (Italy) through a new best-fit procedure
AU - Bonasia, R.
AU - Macedonio, G.
AU - Costa, A.
AU - Mele, D.
AU - Sulpizio, R.
N1 - Funding Information:
We thank A. Folch and S. Scollo for useful comments that improved the clarity of the manuscript. This work was mainly supported by the Civil Defense of Italy , DPC , and Istituto Nazionale di Geofisica e Vulcanologia, INGV , in the framework of the project entitled “SPeeD”.
PY - 2010/1/15
Y1 - 2010/1/15
N2 - A simple semi-analytical model for ash-fall deposit was applied to reconstruct the tephra deposits of the sub-Plinian 472 AD eruption of Vesuvius, Italy, which is of the scale of the reference eruptive scenario for the emergency planning, at Vesuvius. Applying a novel least-squares method, the bulk grain-size distribution, the total mass, and the eruption column height were obtained by fitting the computed ground load and granulometries with the observed ones. The analysis of the effect of three different weighting factors in the minimization procedure was also performed. Results showed that the statistical weighting factor produced the minimum bias. The best correlation between calculated and measured deposit was found, even though the quantity of the input data was not very high, as it commonly occurs for several ancient eruptions. Model results were also in agreement with estimations provided by other independent methods.
AB - A simple semi-analytical model for ash-fall deposit was applied to reconstruct the tephra deposits of the sub-Plinian 472 AD eruption of Vesuvius, Italy, which is of the scale of the reference eruptive scenario for the emergency planning, at Vesuvius. Applying a novel least-squares method, the bulk grain-size distribution, the total mass, and the eruption column height were obtained by fitting the computed ground load and granulometries with the observed ones. The analysis of the effect of three different weighting factors in the minimization procedure was also performed. Results showed that the statistical weighting factor produced the minimum bias. The best correlation between calculated and measured deposit was found, even though the quantity of the input data was not very high, as it commonly occurs for several ancient eruptions. Model results were also in agreement with estimations provided by other independent methods.
KW - HAZMAP model
KW - Pollena eruption
KW - Vesuvius
KW - inverse problem
KW - tephra fallout
UR - http://www.scopus.com/inward/record.url?scp=73649142716&partnerID=8YFLogxK
U2 - 10.1016/j.jvolgeores.2009.11.009
DO - 10.1016/j.jvolgeores.2009.11.009
M3 - Artículo
SN - 0377-0273
VL - 189
SP - 238
EP - 246
JO - Journal of Volcanology and Geothermal Research
JF - Journal of Volcanology and Geothermal Research
IS - 3-4
ER -