GNGTS 2021 - Atti del 39° Convegno Nazionale

91 GNGTS 2021 S essione 1.1 Fig. 1 - Diagrams showing the main active faults activated during the 29 December 2020 Petrinja earthquake (Tondi et al ., 2021). (a) The Petrinja Fault Zone (PFZ) is a ca. 10 km wide right-lateral strike-slip shear zone composed by “conjugate” faults in which the Župić and the Kupa Faults represent (Y) and (X) shears, respec- tively. The inset shows the structural features of an idealized shear zone. (b) Tension cracks (T) and mole tracks (P) are developed coseismically within the NW-striking (Y) and NE-striking (X). (c) Simplified sketch of Fig. 1b.