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Influence of Focal Mechanism in Probabilistic Seismic Hazard Analysis

¹ Università Federico II di Napoli
Department of Physics
Via Cintia
80126 Napoli, Italy
 (V.C.)

² Istituto Nazionale di Geofisica e Vulcanologia
Via di Vigna Murata, 605
00143 Roma, Italy
 (A.H.)

An extension of probabilistic seismic hazard analysis is proposed to introduce a priori information about seismic source parameters. In particular, faulting style is taken into account with a theoretical corrective coefficient applied to the attenuation law. The validity of this correction is assessed through a comparison with observed data, attenuation law predictions corrected and not corrected, and the results of attenuation laws containing faulting style parameters. The probabilistic nature of the analysis is maintained, introducing into the classical hazard formulation a 2D probability density function describing the most probable focal mechanisms associated with each seismic source zone. This new expression may also be used in the framework of deaggregation analysis. Thus, the design earthquake resulting from the deaggregation is characterized by a focal mechanism. An application to a site located in the Southern Apennines, Italy, is shown. The result of the analysis emphasizes the importance of strike-slip events in the seismic hazard context, compared with normal faulting seismic activity in this region.

Related articles in Bulletin of the Seismological Society of America:

Comment on "Influence of Focal Mechanism in Probabilistic Seismic Hazard Analysis" by Vincenzo Convertito and André Herrero

F. O. Strasser, V. Montaldo, J. Douglas, and J. J. Bommer
Bulletin of the Seismological Society of America 2006 96: 750-753. [Extract] [Full Text]  

Reply to "Comment on ‘Influence of Focal Mechanism in Probabilistic Seismic Hazard Analysis’ by Vincenzo Convertito and André Herrero," by F. O. Strasser, V. Montaldo, J. Douglas, and J. J. Bommer

V. Convertito and A. Herrero
Bulletin of the Seismological Society of America 2006 96: 754-756. [Extract] [Full Text]  

This article has been cited by other articles:

				V. Convertito, A. Emolo, and A. Zollo Seismic-Hazard Assessment for a Characteristic Earthquake Scenario: An Integrated Probabilistic-Deterministic Method Bulletin of the Seismological Society of America, April 1, 2006; 96(2): 377 - 391. [Abstract] [Full Text] [PDF]

				F. O. Strasser, V. Montaldo, J. Douglas, and J. J. Bommer Comment on "Influence of Focal Mechanism in Probabilistic Seismic Hazard Analysis" by Vincenzo Convertito and Andre Herrero Bulletin of the Seismological Society of America, April 1, 2006; 96(2): 750 - 753. [Full Text] [PDF]

				V. Convertito and A. Herrero Reply to "Comment on 'Influence of Focal Mechanism in Probabilistic Seismic Hazard Analysis' by Vincenzo Convertito and Andre Herrero," by F. O. Strasser, V. Montaldo, J. Douglas, and J. J. Bommer Bulletin of the Seismological Society of America, April 1, 2006; 96(2): 754 - 756. [Full Text] [PDF]