Table 3. Experiments Classified by the Spatial Extent of Damage in the Samplea



Experiments	Vr, m/s	Vs, m/s	Vr/Vs
No Damage
C-13	left 1150	1280	0.90
C-13	right 1150	1280	0.90
H-43	left 1110	1220	0.91
H-43	right 1090	1220	0.90

All-Damaged
H-50	left 900	1030	0.87
H-50	right Vr could not be measured 	  -   	 - 
H-53	left 830	-	-
H-53	right Vr could not be measured 	  -   	 -
H-70	left 720	970	0.74
H-50	right Vr could not be measured 	  -   	 -
HH-7	left 820	1000	0.84
HH-7	right 860	1000	0.84

aExperiment name, direction of rupture propagation (left or right), rupture speed vr, shear wave velocity vs, and ratio of vr/vs. All experiments were run at 12 MPa, the remote uniaxial stress, not the normal stress resolved onto the main fault.