Publication Date:
2017-04-03
Description:
In the framework of the 2004 reference seismic hazard map of Italy the amplitude of the strong-motion (expressed in
terms of Peak Horizontal Acceleration with 10% probability of non-exceedence in 50 years, referred to average hard
ground conditions) was computed using different predictive relationships. Equations derived in Italy and in Europe
from strong-motion data, as well as a set of weak and strong-motion based empirical predictive relationships
were employed in a logic tree procedure, in order to capture the epistemic uncertainty affecting ground-motion
attenuation. This article describes the adjustments and conversions required to eliminate the incompatibilities
amongst the relations. Particularly significant are distance conversions and style-of-faulting adjustments, as well as
the problems related to the use of regional relations, such as the selection of a reference depth, the quantification
of random variability and the strong-motion prediction. Moreover, a regional attenuation relationship specific for
volcanic areas was also employed, allowing a more realistic evaluation of seismic hazard, as confirmed by the
attenuation of macroseismic intensities.
Description:
Published
Description:
295-316
Description:
4.2. TTC - Scenari e mappe di pericolosità sismica
Description:
JCR Journal
Description:
reserved
Keywords:
epicentral and Joyner-Boore distance
;
epistemic uncertainty,
;
predictive relationships
;
seismic hazard mapping
;
scaling laws
;
volcanic regions
;
04. Solid Earth::04.06. Seismology::04.06.11. Seismic risk
Repository Name:
Istituto Nazionale di Geofisica e Vulcanologia (INGV)
Type:
article
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