The Kinematic Model of the 2011 Mw7.1 Van Earthquake Using cGPS, Strong-Motion, Teleseismic and GPS Data

Monday, 15 December 2014
Ali Ozgun Konca, Kandilli Observatory, Istanbul, Turkey and Semih Ergintav, Bogazici University, Istanbul, Turkey
We have obtained a finite-fault kinematic model for the 2011 Mw7.1 Van Earthquake using near-source 1Hz GPS, strong-motion and teleseismic waveforms along with the static displacements from the GPS data. We performed resolution tests to analyze the effect of each data set on the solution. The resolution tests show that the dataset is sufficient to resolve the basic features of the slip distribution and rupture velocity. The near-source seismic data is sensitive to the shape and direction of the slip, while GPS is sensitive to location. Our joint model shows that the slip is primarily updip toward west and downdip toward east with 5 meters of peak slip updip from the hypocenter at 18.7 km. Rupture velocity is close to 1.5 km/s. The fits to the 1 Hz GPS waveforms depict the importance of high-rate GPS and their potential to be used in earthquake kinematic modeling.