Active deformation of the Corinth rift, Greece: Results from repeated Global Positioning System surveys between 1990 and 1995

Abstract

Abstract.Between 1990 tectonic observations shows that these two earthquakes occurred on low-angle (_< 35 ø) north dipping normal faults located between 4.5 and 10 km depth in the inner part of the rift. Assuming that the deformation is concentrated in relatively narrow deforming zones, we use a simple model of a dislocation in an elastic half-space to study the implication of the localization. Using the geometry of the known seismogenic faults, our observations imply continuous aseismic deformation in the uppermost crust of the inner rift. This model predicts geodetic strain rates close to seismic strain rates in opposition to previous estimates. This is because our model takes into account the activity on low-angle normal faults in the inner rift and an effective seismogenic layer of 6-7 kin, about half that usually assumed.

Patterns of Quaternary uplift of the Corinth rift southern border (N Peloponnese, Greece) revealed by fluvial landscape morphometry

“…In a similar way, from a corrected S R age estimate of 350-400 ka and GR ne twork values of 410-420 m in the central sector, we derive a minimum uplift rate of 1.05-1.2 mm year -1 for the penultimate uplift phase. (Backert et al, 2010;Briole et al, 2000).…”

Active faulting at the western tip of the Gulf of Corinth, Greece, from high-resolution seismic data

“…show that most of present-day deformation is concentrated offshore in a narrow band (Briole et al, 2000;Avallone et al, 2004). In this area, the southern coast is bounded by the en-echelon Eliki-AigionKamarai-Psathopyrgos fault system (Fig.…”

Neotektonikh Δομη Και Εξελιξη Της Περιοχης Του Φυλλου Αιγιο (Β. Πελοποννησος)

“…Τελευταίες έρευνες με γεωδαιτικές μετρήσεις δείχνουν ότι η περιοχή του δυτικού Κορινθιακού διευρύνεται σε ΝΔ κατεύθυνση, με ρυθμό 1-1,5 cm/y, ενώ του ανατολικού με ρυθμό 0,5 cm/y (Billiris et al, 1991, Clarke et al, 1998, Briole et al, 2000. Στη περιοχή της βορείου Πελοποννήσου λόγω της νεοτεκτονικής παραμόρφωσης έχει διαπιστωθεί αναστροφή της ροής (ροή προς νότο), ορισμένων τμημάτων του άνω ρου του υδρογραφικού δικτύου (Zelilidis 2000).…”