GNGTS 2014 - Atti del 33° Convegno Nazionale

66 GNGTS 2014 S essione 2.1 The main features introduced in the new version of SIGE are the following: • Input: magnitude (�� �� ���� ���������� ������������ ����� ������ Ml or Mw), epicentral coordinates, focal depth. • Ml-Mw transformation (Gasperini et al. , 2013). • Mw-Io relationship obtained by a regression on the seismic catalog CPT11 (Io= 2.1241*Mw-4.106). • Relationship for the attenuation ofmacroseismic intensity: GomezCapera (2007) ifML≤5.5 (Io≤VIII); Pasolini et al. (2008), modified with the introduction of a no-attenuation area as a function of Io, if ML>5.5 (Io>VIII ). • Introduction of a calibration to take into account ��� ���������� ����� ����� ��� ���� �� the earthquake focal depth (if h>20 km I0’=I0-0.0259*(h-20)). • Introduction of different ����� ��������� ��� ��������� ����������� ��� ��� �������� ����� Mw-Io relations and different attenuation for the volcanic zones (Gomez Capera, 2007). • Vulnerability classes of the Italian real estate based on ISTAT 2001 census data (building typology, age of construction, number of stories). • Damage represented in terms of the 5 damage levels of the macroseismic scale EMS-98 (��������� ������ Grünthal, 1998). • Probability of a given damage level for each vulnerability class derived by Damage Probability Matrices (Di Pasquale et al., 2000). • Loss output in terms of collapsed dwellings (damage level D5), unusable dwellings (damage levels D3, D4, D5), inhabitants in collapsed dwellings (fatalities), inhabitants in unusable dwellings (homeless). • Introduction of the Seismic Emergency Scale (ES) combining in a single indicator, taking values from 1 to 5, the estimates of damaged dwellings, homeless and people involved in building collapse. • Uncertainty of the results assessed in terms of both hazard (half degree of the macroseismic intensity evaluated in each municipality) and vulnerability (min, med, max values corresponding to 16, 50 and 84 percentile considering the distribution and the standard deviation of the Damage Probability Matrices). Fig. 1 – Comparison, as a function of earthquake magnitude, of the number of people resident in unusable dwellings (homeless) obtained by SIGE with the real data surveyed on field. Lines indicated by “espo” correspond to an exponential fit on the data that becomes linear in a semi-log plot.