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A physics-based earthquake simulator and its application to seismic hazard assessment in Calabria (Southern Italy) region

100%

Console R. , Nardi A. , Carluccio R. , Murru M. , Falcone G. , Parsons T.

Acta Geophysica

2017

tom Vol. 65, no. 1

243--257

The use of a newly developed earthquake simulator has allowed the production of catalogs lasting 100 kyr and containing more than 100,000 events of magnitudes ≥4.5. The model of the fault system upon which we applied the simulator code was obtained from the DISS 3.2.0 database, selecting all the faults that are recognized on the Calabria region, for a total of 22 fault segments. The application of our simulation algorithm provides typical features in time, space and magnitude behavior of the seismicity, which can be compared with those of the real observations. The results of the physics-based simulator algorithm were compared with those obtained by an alternative method using a slip-rate balanced technique. Finally, as an example of a possible use of synthetic catalogs, an attenuation law has been applied to all the events reported in the synthetic catalog for the production of maps showing the exceedance probability of given values of PGA on the territory under investigation.

Sopravvivere al cataclisma: il Sud d’Italia dopo il sisma del 1783 nei racconti di viaggio del Grand Tour

80%

Tylusińska-Kowalska A. , Tylusińska-Kowalska A.

Kwartalnik Neofilologiczny

2018

nr 4

Wpływ pożaru lasu na czas opóźnienia odpływu bezpośredniego wód opadowych z małej zlewni w Kalabrii

80%

Cogliandro V. , Krajewski A. , Rutkowska A. , Porto P. , Banasik K.

Sylwan

2017

tom 161

nr 08

Hydrological processes in forested areas such as runoff and erosion after heavy rainfalls are sensitive to changes in land surface properties that can be significantly modified by fire. Rainfall−runoff events recorded in a small forested catchment in Calabria (southern Italy), of area of 1.36 hectare, in the period of 2014−2015, were analyzed to check differences in lag time of direct runoff, i.e. the basic characteristics in rainfall−runoff modelling, before and after the forest fire. Lag time, defined as the elapsed time between the occurrence of the centroids of the effective rainfall intensity hyetograph and the storm runoff hydrograph, was computed with the use of two methods of effective rainfall estimation, i.e. CN−SCS (Soil Conservation Service) and Duband method. In the first one effective rainfall starts after no runoff period, when rain water is used for interception, filling local depressions and high infiltration. In the other one, effective rainfall starts at the beginning of rain and then increases more gentle than in the first method. The results show that in response to the forest fire, the average lag time was reduced to 28% of the average value representative for original conditions when CN−SCS method was used (from 0.530 h before the forest fire to 0.145 h after the fire) and to 38% when the other method was used (from 0.637 h to 0.243 h, respectively). Significance of the differences in lag time was confirmed statistically with Mann−Whitney U test. The results of the investigation, i.e. reduction of lag time, and in consequence higher value and earlier appearance of peak discharge, confirm the thesis that forest fire would increase the risk of flood flows.

Uwagi nad trzęsieniami ziemi i wybuchami wulkanów

70%

Zmijewski E.

Wszechświat

1882

tom 1

nr 12