Earthquake activity and hazard in the Carpathian Basin I

Zsíros, T. (2003) Earthquake activity and hazard in the Carpathian Basin I. Acta Geodaetica et Geophysica Hungarica, 38 (3). pp. 345-362. ISSN 1217-8977


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The seismicity and seismic hazard of the Carpathian Basin are studied in this paper based on a recent comprehensive database cataloging over 20 thousands earthquakes between 456 and 1995. The epicentre distributions of these events indicate the geographical positions of the most active tectonic processes in the region. Among them the south-eastern bend of the Carpathians (Háromszék-Vrancea zone, Romania) and the area of south-eastern Alps have the highest seismic activity. The former source area is very specific by its strong seismicity from the intermediate depth domain (70-170 km). The intermediate-depth sources are deepening nearly vertically but in somewhat SW direction and the separation of the crustal earthquakes from the events connected to the lithospheric plate subsiding into the astenosphere is well observed at about 50 km, which is the depth of the Mohorovičić discontinuity (MOHO) in this region. The lithospheric plate subsiding to the depth of 150-200 km is supposed to be disconnected around 50 km. Some weakness of this slab can also be assumable based on the lower seismic activity observed between 100-120 km.

Item Type: Article
Subjects: Q Science / természettudomány > QE Geology / földtudományok > QE01 Geophysics / geofizika
Depositing User: Endre Sarvay
Date Deposited: 09 Nov 2018 10:19
Last Modified: 09 Nov 2018 10:19

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