USGS National-Strong Motion Program
Preliminary Corrected Peak Ground Acceleration and Velocity and Pseudo-Spectral Acceleration Values for
September 02, 2005, Obsidian Butte, CA Earthquake (posted 09/01/2005; updated 09/27/2005)
Mw 5.1, 09/02/2005, 01:27 UTC, 09/01/2005, 06:27 PM PDT, 33.160 N, 115.637 W, 9.7 km depth, Regional Network ID# ci14179736
Sta Inst Inst State: City; Recorder Location Owner Lat Lon Dist Az Ch Sensor Orient PGA PGV PSA at:
Code type S/N     deg deg km deg No type deg cm/s/s cm/s 0.3 s 1.0 s 3.0 s
5062 K2 546 CA: Salton Sea Wildlife Refuge USGS 33.1774 -115.6156 2.0 46 1 FBA-2g 360 -213.0 9.54 35.70 4.240 3.990
                  2 FBA-2g UP -235.0 -3.68 8.48 3.030 0.490
                  3 FBA-2g 90 -236.0 12.00 29.50 7.340 1.860
5061 Etna 2053 CA: Calipatria; Fire Station USGS 33.1266 -115.5159 11.3 108 1 EpiSen 90 -71.5 3.82 15.70 3.430 0.896
                  2 EpiSen 360 70.8 3.75 14.10 4.710 1.490
                  3 EpiSen UP -56.9 1.46 5.71 0.989 0.485
5060 K2 523 CA: Brawley; Airport Hangar USGS 32.991 -115.5128 22.0 148 1 FBA-2g 360 -41.6 -2.16 5.26 2.300 0.538
                  2 FBA-2g UP -16.9 0.48 1.61 0.491 0.191
                  3 FBA-2g 90 36.2 -2.20 4.82 3.680 0.451
5271 K2 542 CA: Bombay Beach, Fire Station USGS 33.3526 -115.7333 23.2 337 1 FBA-11 90 -8.2 -0.75 1.32 0.575 0.180
                  2 FBA-11 UP 4.5 0.23 1.17 0.207 0.059
                  3 FBA-11 360 6.4 0.64 1.46 0.523 0.112
286 K2 527 CA: Imperial Vly;Superstition Mtn Pk UCSB 32.9548 -115.8243 28.7 218                
      Surface           1 FBA-23 360 -19.8 -0.79 3.03 0.326 0.047
      Surface           2 FBA-23 UP -8.3 -0.24 0.75 0.264 0.032
      Surface           3 FBA-23 90 -13.3 0.70 2.33 0.605 0.070
      Downhole 35.7m           4 EpiSen 90 -5.0 0.32 1.01 0.570 0.071
      Downhole 35.7m           5 EpiSen 360 -6.7 -0.56 1.79 0.329 0.045
      Downhole 35.7m           6 EpiSen UP 2.6 -0.21 0.78 0.266 0.031
5028 Etna 2028 CA: El Centro; Imperial Valley College USGS 32.829 -115.504 38.8 161 1 EpiSen 90 -7.0 -0.97 1.65 1.280 0.276
                  2 EpiSen 360 -6.9 -0.53 1.76 0.880 0.216
                  3 EpiSen UP 2.7 -0.17 1.13 0.304 0.060
412 K2 589 CA: El Centro; Array 10, Region Hospital USGS 32.781 -115.567 42.5 171 1 FBA-2g 230 7.9 1.09 1.55 1.060 0.175
                  2 FBA-2g UP -5.8 -0.24 1.61 0.405 0.097
                  3 FBA-2g 320 -8.2 0.74 1.92 1.240 0.164
464 Etna 2027 CA: El Centro; Meadows Union School USGS 32.800 -115.473 42.8 159 1 EpiSen 90 7.0 1.12 1.36 1.510 0.335
                  2 EpiSen 360 6.1 0.60 1.83 0.996 0.203
                  3 EpiSen UP -4.1 -0.20 0.93 0.319 0.069
5055 Etna 2037 CA:Holtville; Post Office USGS 32.812 -115.377 45.6 148 1 EpiSen 90 -10.7 -0.80 2.33 0.630 0.190
                  2 EpiSen 360 4.8 0.56 1.23 0.752 0.202
                  3 EpiSen UP -4.3 -0.23 0.97 0.222 0.020
5375 K2 522 CA:Ocotillo Wells;Vehicle Rec Area USGS 33.156 -116.168 49.5 270 1 FBA-2g 360 -7.7 -0.58 1.84 0.298 0.029
                  2 FBA-2g UP 4.6 0.18 0.86 0.159 0.017
                  3 FBA-2g 90 -4.2 0.27 1.44 0.198 0.023
5053 K2 529 CA: Calexico; Fire Station USGS 32.6695 -115.4925 56.1 166 1 FBA-2g 360 4.3 0.38 1.07 0.579 0.066
                  2 FBA-2g UP -3.2 0.15 0.68 0.258 0.040
                  3 FBA-2g 90 -6.7 -0.83 1.70 0.630 0.131
5054 Etna 2052 CA: Bond's Corner; Omlin Residence USGS 32.6932 -115.3382 58.8 152 1 EpiSen 90 21.2 -1.11 6.60 0.417 0.147
                  2 EpiSen 360 19.3 -0.97 7.73 0.491 0.102
                  3 EpiSen UP -3.4 -0.21 0.93 0.449 0.025