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ANISOTROPY OF ATTENUATION OF HIGH-FREQUENCY BODY WAVES IN THE SOUTHERN EXTERNAL DINARIDES (CROSBI ID 665325)

Prilog sa skupa u zborniku | sažetak izlaganja sa skupa | međunarodna recenzija

Dasović, Iva ; Herak, Davorka ; Herak Marijan ANISOTROPY OF ATTENUATION OF HIGH-FREQUENCY BODY WAVES IN THE SOUTHERN EXTERNAL DINARIDES // Book of Abstracts of the 36th General Assembly of the European Seismological Commission / D'Amico, Sebastiano ; Galea, Pauline ; Bozionelos, George et al. (ur.). Valletta: University of Malta, 2018. str. ESC2018-S30-620-ESC2018-S30-620

Podaci o odgovornosti

Dasović, Iva ; Herak, Davorka ; Herak Marijan

engleski

ANISOTROPY OF ATTENUATION OF HIGH-FREQUENCY BODY WAVES IN THE SOUTHERN EXTERNAL DINARIDES

The Dinarides are a part of the complex Alpine– Carpathian–Dinaric orogenic system characterised by NW trend and SW vergence of compressional and imbricated structures. The External Dinarides, their western part, is derived from the Adriatic microplate, i.e. the Adriatic carbonate platform. Recent seismicity in the area varies from moderate to high with the rare occurrence of strong earthquakes. Prevailing compressional stresses result in mainly reverse faulting, with or without a dextral strike-slip component. The southern part of the External Dinarides is the seismically most active area in the External Dinarides, where one of the strongest events occurred: Ston–Slano (1996, ML = 6.0), Montenegro (1979, Mw = 7.1) and Dubrovnik (1667, IX EMS). Therefore, the area shows one of the highest seismic hazard in Croatia. The extended coda normalization method was applied to local earthquakes’ high-frequency body waves in order to estimate attenuation of direct P- and Swaves, i.e. the quality factors QP and QS. The preliminary results of the azimuthal analysis of the attenuation factors clearly indicate anisotropy of seismic attenuation in the high-frequency range, with higher attenuation in the direction perpendicular to the strike of the Dinarides and lower attenuation parallel to it. These quality factors reflect the total attenuation of the direct body waves in the crust and therefore reflect its features. Furthermore, these results indicate strong attenuation of the direct P- and S-waves in general.

anisotropy of attenuation ; body waves, Southern External Dinarides

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Podaci o prilogu

ESC2018-S30-620-ESC2018-S30-620.

2018.

objavljeno

Podaci o matičnoj publikaciji

Book of Abstracts of the 36th General Assembly of the European Seismological Commission

D'Amico, Sebastiano ; Galea, Pauline ; Bozionelos, George ; Colica, Emanuele ; Farrugia, Daniela ; Agius, Matthew

Valletta: University of Malta

978-88-98161-12-6

Podaci o skupu

36th General Assembly of the European Seismological Commission

predavanje

02.09.2018-07.09.2018

Valletta, Malta

Povezanost rada

Geofizika