Source characteristics of the 2015 Mw6.5 Lefkada, Greece, strike-slip earthquake

We present a kinematic slip model from the inversion of 1Hz GPS, strong motion, and interferometric synthetic aperture radar (InSAR) data for the 2015 M(w)6.5 Lefkada, Greece, earthquake. We will show that most of the slip during this event is updip of the hypocenter (10.7km depth) with substantial slip (>0.5m) between 5km depth and the surface. The peak slip is similar to 1.6m, and the inverted rake angles show predominantly strike-slip motion. Slip concentrates mostly to the south of the hypocenter, and the source time function indicates a total duration of similar to 17s with peak moment rate at similar to 6s. We will show that a 65 degrees dipping geometry is the most plausible due to a lack of polarity reversals in the InSAR data and good agreement with Coulomb stress modeling, aftershock locations, and regional moment tensors. We also note that there was an similar to 20cm peak-to-peak tsunami observed at one tide gauge station 300km away from the earthquake. We will discuss tsunami modeling results and study the possible source of the amplitude discrepancy between the modeled and the observed data at far-field tide gauges.