REGIONAL STRESS REGIMES (ANDERSON THEORY OF FAULTING) lo, is located parallel to the fault plane, normal to the direction of slip/ l o3 is located normal to o, and o2/ Earth's surface is a principal plane ofstress Ideal fault geometry 3 stress regimes: Normal, Thrust, Strike-slipREGIONAL STRESS REGIMES (ANDERSON THEORY OF FAULTING) • [s2 is located parallel to the fault plane, normal to the direction of slip] [ s3 is located normal to s1 and s2 ] • Earth’s surface is a principal plane of stress • Ideal fault geometry • 3 stress regimes: Normal, Thrust, Strike-slip