سال انتشار: ۱۳۸۶
محل انتشار: پنجمین کنفرانس بین المللی زلزله شناسی و مهندسی زلزله
تعداد صفحات: ۸
Zaicenco – Institute of Geology and Seismology, Academy of Sciences of Moldova, str. Academiei 3, MD-2028, Chisinau, Rep. of Moldova
The current study presents the analysis of focal mechanisms of earthquakes for the region of South- Eastern Carpathians, particularly of those originating from the Vrancea zone. To perform the comprehensive analysis data from the ISC Bulletin for the period 1967-2006 were used in the study, to which the series of supplementary catalogues were added: HVD, M&P, ONC, ANSS, MED, ROM+. As a result, the focal mechanisms for 250 catalogued events were obtained, which were projected on a uniform magnitude scale (Mw) for the geographic area of interest in the limits: Latitude 44-50° and Longitude 24- 30° for the continuum reference period of 40 years. The studied events cover the magnitude range 3.0<Mw<7.5, and focal depth distribution constitutes 15% for the crust events and 85% for the intermediate-depth events. The computational procedures of the focal planes are based on the data on the first P-wave arrival polarities. The data on hypocenters, focal depths, magnitudes, location, rake and dip, as well as values for P and T- axes are tabulated in chronological order and visualized using the GIS system GMT.