Figure 1

Location maps of the study area. (a) Regional setting of Greece with dilatational strains from GPS data (from Chousianitis et al.10). HSZ: Hellenic Subduction Zone; NAF: North Anatolian Fault. (b) Fault map with red lines indicating active faults, modified from Deligiannakis et al.49 and Konstantinou et al.34. Black lines with double arrowheads are principal horizontal strain-rate axes on a uniform grid inverted from the GPS velocity field, averaged over a grid used for calculations (see Chousianitis et al.10, for details). Focal mechanisms of earthquakes are from Chousianitis et al.10 and references therein. Historical earthquakes are from Grutzner et al.46, and reference therein. Yellow circles are locations of the 36Cl sampling sites. (c) Detailed fault map of Attica, with highlighted the sampled faults (attributes are from Deligiannakis et al.49, magnitudes in brackets are from Konstantinou et al.34; fault traces are modified from Deligiannakis et al.49 and Konstantinou et al.34). Thick red lines are the sampled faults; thin red lines are other active faults.