Stored Heat Calculated thermal energy stored in a volume of hot rock. It is calculated using the rock volume, porosity, rock density, specific heat of rock, and the difference between the...

Tephra Airborne particles of rock and ash produced by an explosive volcanic eruption. Tephra commonly deposits as a blanket that drapes over the underlying topography.

Transcurrent Fault (Strike-Slip Fault) Vertically dipping fault that results from horizontal shear stress. Slip movement during an earthquake is sideways rather than up or down.