A simplified seismotectonic model is proposed for Bulgaria by introduc
ing generalized seismogenic areas containing systems of complex geomet
ry faults. A tectonic scheme, which considers the main faults only, is
then derived from this. The assessment of the regional seismic hazard
is done using different approaches: the Gumbel, the Cornell, and the
fault rupture model methods. A series of relations among seismological
parameters are derived from the available data. The results obtained
by the different approaches are similar: the most dangerous area is th
e Struma zone, located in southwestern Bulgaria.