Institution: | (1) Physics Department, Bogazici University, 80815 Bebek, Istanbul, Turkey;(2) Dipartimento di Matematica, Università Statale di Bergamo, via dei Caniana 2, 24127 Bergamo, Italy;(3) Kandilli Observatory and Earthquake Research Institute, Bogazici University, 34684 Clengelkoy, Istanbul, Turkey |