All top-depth units are meters, all velocities are m/s. Max. Depth is a guess at the maximum depth at which velocity constraints are provided by a technique at a location. Vs estimates from Vp results are computed assuming Vp/Vs=sqrt(3). Plots available at: http://quake.seismo.unr.edu/ftp/pub/louie/larse/scec00-louie.html Aliso Canyon 34 25.213 N 118 05.802 W, elev 1160 m: Surface-Wave results (poor quality): Depth Vs Depth Vs Depth Vs Max. Depth 0 181 5 269 11 1834 30 30-meter average Vs = 1246 m/s Refraction results (excellent quality): Depth Vp Depth Vp Depth Vp Max. Depth 0 645 4 1635 16.5 4398 30 30-meter average Vp = 2746 m/s estimated Vs = 1585 m/s Antelope Buttes 34 45.808 N 118 23.853 W, elev 878 m: Surface-Wave results (good quality): Depth Vs Depth Vs Depth Vs Max. Depth 0 543 15 1012 105 2852 120 30-meter average Vs = 778 m/s Refraction results (good quality): Depth Vp Depth Vp Depth Vp Max. Depth 0 988 8.5 1601 30 3258 40 30-meter average Vp = 1493 m/s estimated Vs = 862 m/s Gleason Road 34 23.727 N, 118 04.803 W, elev 1525 m: Surface-Wave results (good quality): Depth Vs Depth Vs Depth Vs Max. Depth 0 502 20 1380 67 2335 80 30-meter average Vs = 795 m/s Refraction results (good quality): Depth Vp Depth Vp Max. Depth 0 1031 26 2737 40 30-meter average Vp = 1316 m/s estimated Vs = 760 m/s Lovejoy Buttes 34 35.370 N, 117 50.883 W, elev 880 m: Surface-Wave results (good quality): Depth Vs Depth Vs Depth Vs Max. Depth 0 310 7 1270 75 2230 90 30-meter average Vs = 1046 m/s Refraction results (good quality): Depth Vp Depth Vp Max. Depth 0 375 3 2395 20 30-meter average Vp = 2193 m/s estimated Vs = 1266 m/s Mill Creek Summit (USC SM station MCS) 34 23.413 N, 118 04.893 W, elev 1520 m: Surface-Wave results (excellent quality): Depth Vs Depth Vs Depth Vs Max. Depth 0 321 11 544 62 1270 75 30-meter average Vs = 462 m/s Refraction results (poor quality): Depth Vp Depth Vp Max. Depth 0 493 15.5 1211 20 30-meter average Vp = 842 m/s estimated Vs = 486 m/s Newhall Fire Station (Rosrine Borehole) 34 23.197 N, 118 32.050 W, elev 375 m: Surface-Wave results (excellent quality): Depth Vs Depth Vs Depth Vs Depth Vs Max. Depth 0 210 8 370 34 707 125 2320 145 30-meter average Vs = 327 m/s Refraction results (poor quality): Depth Vp Depth Vp Depth Vp Max. Depth 0 322 4 425 23 969 30 30-meter average Vp = 534 m/s estimated Vs = 309 m/s Palmdale (SM station PDL) 34 34.826 N, 118 06.511 W, elev 805 m: Surface-Wave results (excellent quality): Depth Vs Depth Vs Depth Vs Depth Vs Max. Depth 0 270 10 340 20 1610 107 3130 120 30-meter average Vs = 740 m/s No refraction survey made. Piute Butte 34 39.166 N, 117 50.961 W, elev 838 m: Surface-Wave results (poor quality): Depth Vs Depth Vs Depth Vs Max. Depth 0 158 6 269 12 2300 20 30-meter average Vs = 1465 m/s Refraction results (excellent quality): Depth Vp Depth Vp Depth Vp Max. Depth 0 473 2 2205 21 4631 30 30-meter average Vp = 2818 m/s estimated Vs = 1627 m/s