UNIVERSITY OF BUCHAREST
FACULTY OF PHYSICS

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2024-11-22 1:29
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Conference: Bucharest University Faculty of Physics 2006 Meeting


Section: Atmosphere and Earth Science; Environment Protection


Title:
The study of seismic activity recorded on Romania territory during 2000-2005


Authors:
Marius Craiu, Mihaela Popa, Mircea Radulian


Affiliation:
National Institute for Earth Physics, 12 Calugareni St., 077125, PO Box MG-2 Magurele, Romania,

Tel.: +4021 493 01 17, Fax: +4021 493 00 53


E-mail
gcraiu@infp.ro


Keywords:
seismic activity,earthquake sequence


Abstract:
Romania is a country with moderate seismicity which is periodically affected by crustal and subcrustal earthquakes. The subcrustal seismic activity is concentrated at the bend of the Carpathian arc (Vrancea region) within a confined focal volume in the depth range from 60 to200 km. The subcrustal earthquakes generated here are of the largest magnitude throughtout the Carpathians ( Mw=7.7 maximum recorded magnitude). The seismicity of Romania is distributed in few epicentral zones characterized by specific seismotectonics processes: Vrancea, Fagaras-Campulung, Banat, Crisana, Maramures and South Dobrogea. Additionally there are a few more epicentral zones with local importance in Jibou and Tarnave regions in Transilvania, north and west Oltenia, north of Moldova, Campia Romana. Also, the influence of sources locate outside Romania is noticed at borders in south (Oltenia and Dobrogea), west (Banat) and north (Maramures). Expanding and modernization of the Romanian Seismic Network has allowed to record and detect a large number of earthquakes all over the country. At the same time the quality of the recorded data has grown allowing a better localization of the seismic events. To emphasize the peculiarities of Romanian seismicity we use a data set recorded between 2000-2005. Thus, we analyse the main characteristics of the depth distribution, seismic energy distribution and magnitude distribution for each seismogenic zone. This analyse represents a reevaluation of the Romania seismicity and provides important elements for reducing seismic risk and earthquakes prediction.