Neo-Alpine structural evolution and present-day tectonic activity of the eastern Southern Alps: The case of the Ravne Fault, NW Slovenia

摘要: Abstract The Ravne Fault is an actively propagating NW–SE trending dextral strike-slip fault in the Julian Alps of NW Slovenia, which has been responsible for two moderate sized earthquakes last decade. Strike-slip displacements on moderate-steep planes are recent seismic activity that confined to shallow crustal levels. growing by interaction individual right stepping segments and breaching local transtensional step-over zones. geometry controlled original thrust zone, modified successive faulting within zone. In modern N directed maximum horizontal stress regime, segmented lengthening active growth at fault's end. spatial distribution earthquake clusters shows faults contemporaneous. Detailed analysis pattern events surface geometries suggests similar magnitudes kinematics, deciding factor whether rupture will breach a zone relationship between lengths neighbouring separation distances step-over-zones. represents example tectonic structure lies area subjected multiple under different regional conditions. At epicentral depths, system accommodating strain along newly formed planes, whereas upper parts crust distributed over wider deformation includes reactivated brittle faults.