Brittle-Ductile Boundary 2
Brittle-Ductile Boundary 2 : The depth in the crust across which the thermo-mechanical properties of the crust change from brittle behavior (tending to break) to ductile behavior (tending to bend). Most earthquakes initiate at or above this depth on steep (high-angle) faults, below this depth, fault slips may be aseismic and may grade from high angle to low angle