Fig. 2From: Reconsideration of the energy balance in earthquake faultingGeometry and notation of the displacement discontinuity \(\Delta {\mathbf{u}}\) across a fault \(\Sigma\). \({\mathbf{n}}^{ - }\) is the unit normal vector to the backside \(\Sigma^{ - }\) of the fault, and \({\mathbf{D}}\) represents the fault-parallel component of \(\Delta {\mathbf{u}}\)Back to article page