Journal of Seismology

, Volume 9, Issue 3, pp 295–316

Treatment of ground-motion predictive relationships for the reference seismic hazard map of Italy

  • Valentina Montaldo
  • Ezio Faccioli
  • Gaetano Zonno
  • Aybige Akinci
  • Luca Malagnini
Article

DOI: 10.1007/s10950-005-5966-x

Cite this article as:
Montaldo, V., Faccioli, E., Zonno, G. et al. J Seismol (2005) 9: 295. doi:10.1007/s10950-005-5966-x

Abstract

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.

Keywords

epicentral and Joyner-Boore distanceepistemic uncertaintypredictive relationshipsseismic hazard mappingscaling lawsvolcanic regions

Copyright information

© Springer Science + Business Media, Inc. 2005

Authors and Affiliations

  • Valentina Montaldo
    • 1
  • Ezio Faccioli
    • 2
  • Gaetano Zonno
    • 1
  • Aybige Akinci
    • 3
  • Luca Malagnini
    • 3
  1. 1.Istituto Nazionale di Geofisica e VulcanologiaSezione “Sismologia Applicata”MilanoItaly
  2. 2.Department of Structural EngineeringPolitecnico di MilanoMilanoItaly
  3. 3.Istituto Nazionale di Geofisica e VulcanologiaSezione “Sismologia e Tettonofisica”RomaItaly