def _get_inter_event_tau(self, C, mag, num_sites):
        """
        Returns the inter-event standard deviation (tau), which is dependent
        on magnitude
        """
        base_vals = np.zeros(num_sites)
        if mag <= 4.5:
            return base_vals + C["t1"]
        elif mag >= 5.5:
            return base_vals + C["t2"]
        else:
            return base_vals + C["t1"] + (C["t2"] - C["t1"]) * (mag - 4.5)
def _get_inter_event_tau ( self , C , mag , num_sites ) : base_vals = np . zeros ( num_sites ) if mag <= 4.5 : return base_vals + C [ "t1" ] elif mag >= 5.5 : return base_vals + C [ "t2" ] else : return base_vals + C [ "t1" ] + ( C [ "t2" ] - C [ "t1" ] ) * ( mag - 4.5 )
Returns the inter-event standard deviation (tau), which is dependent
        on magnitude