Please use this identifier to cite or link to this item: http://hdl.handle.net/2122/3736
AuthorsGalluzzo, D.* 
Zonno, G.* 
Del Pezzo, E.* 
TitleStochastic Finite-Fault Ground Motion Simulation in a Wave Field Diffusive Regime: Case Study of the Mt. Vesuvius Volcanic Area
Issue Date2008
Series/Report no.3/98 (2008)
DOI10.1785/0120070183
URIhttp://hdl.handle.net/2122/3736
KeywordsStochastic Simulation
Vesuvius
Subject Classification04. Solid Earth::04.06. Seismology::04.06.04. Ground motion 
AbstractThe main aim of the present work consists in the validation of stochastic method for simulating weak ground motion in a diffusive regime due to low-to-moderate magnitude earthquakes, and in particular in its application to a volcanic area. We simulated the peak ground acceleration and the response acceleration spectra caused by two earthquakes scenarios (MD = 4.3 and MD = 5.4) at Mt. Vesuvius volcanic area by using the stochastic finite-fault simulation method. We validated the stochastic methodology by combining source, path and site parameters of the investigated area considering the time duration parameter, Trms, calculated on the study seismograms. The values of time durations are confirmed by calculating the same parameter, Trms, on the seismogram energy envelope described by multiple scattering models, in terms of scattering and the intrinsic dissipation coefficient. Initially, the simulations were evaluated for 10 local earthquakes (1.7 ≤ MD ≤ 3.6) that occurred at Mt Vesuvius in 1999 and are then compared with the observed data. The comparison between simulated and observed seismograms has been used to calibrate the stochastic procedure, and has been considered as the starting point for simulating ground motion for the scenario earthquake (MD > 3.6) that could occur in the study area. The scenario earthquake and the relative fault features were chosen on the base of statistical, tectonic, structural and historical studies of the study area. We simulated ground motions for a maximum magnitude value, Mmax, of 4.3, determined from examination of the Gutenberg-Richter law for the study area, and also for an Mmax = 5.4, a magnitude that is associated with the earthquakes that struck the ancient town of Pompei 17 years before the eruption of Mt Vesuvius that occurred in 79 AD. The largest values of Amax for the MD = 4.3 seismic event are in the range of 0.140 g to 0.029 g. In the case of MD = 5.4, we obtain PGA values in the range between 0.17 and 0.55 g.
Appears in Collections:Papers Published / Papers in press

Files in This Item:
File Description SizeFormat 
galluzzoetal_ep_080408.pdf1.48 MBAdobe PDFView/Open
Galluzzo_et_al_2008_BSSA.pdf1.35 MBAdobe PDFView/Open    Request a copy
Show full item record

Page view(s)

74
checked on Apr 23, 2017

Download(s)

343
checked on Apr 23, 2017

Google ScholarTM

Check

Altmetric