Coseismic deformation, field observations and seismic fault of the 17 November 2015 M = 6.5, Lefkada Island, Greece earthquake

On the Segmentation of the Cephalonia–Lefkada Transform Fault Zone (Greece) from an InSAR Multi-Mode Dataset of the Lefkada 2015 Sequence

“…The two lobes on Lefkada, as seen in the descending unwrapped pairs, are part of the classic strike-slip deformation pattern (the rest is covered by the sea body). Previous studies have noted the existence of displacement at the tip of Cephalonia [7,8,10]. The geodetic InSAR results, presented here ( Figure 2), provide additional evidence on the displacement at the northern tip of Cephalonia.…”

“…Initially, we attempted to jointly model our InSAR results with GPS data [9,10,12]. However, the joint geodetic inversion led to large residuals in both datasets.…”

“…On 17 November 2015, an earthquake (Mw 6.4) ( Figure 1b) struck the western coast of Lefkada island, which stimulated a wealth of publications [7][8][9][10][11][12][13][14][15][16][17][18]. Sokos et al [19] were the first to identify that the mainshock broke a strong asperity, left unbroken, in-between two large subevents of the previous 2003 doublet earthquake of Mw 6.2.…”

“…This complexity is also reflected in the modelling of geodetic data. For example, Ganas et al [10], based on InSAR and Global Positioning System (GPS ) data, presented two uniform slip fault models; one with a unique fault and another one with two faults. Their preferred solution is the two-fault uniform slip model, which comprises of the main fault alongside a smaller fault, parallel to the main one, located partly onshore the island of Lefkada, close to the latitude of the mainshock.…”

UAV-based mapping, back analysis and trajectory modeling of a coseismic rockfall in Lefkada island, Greece

“…The causative fault is estimated to be a near-vertical strike-slip fault with dextral sense of motion (Ganas et al, , 2016. Based on the focal mechanism study of the earthquake, it was determined that the earthquake was related to the right lateral Kefalonia-Lefkada Transform Fault, which runs nearly parallel to the west coasts of both Lefkada and Kefalonia island, in two segments (Papazachos et al, 1998;Rondoyanni et al, 2007).…”