USGS National-Strong Motion Program
Preliminary Corrected Peak Ground Acceleration and Velocity and Pseudo-Spectral Acceleration Values for
August 09, 2007, Chatsworth, California Earthquake (posted 08/10/2007)
Mw 4.4, 08/09/2007, 07:58 UTC, 08/09/2007, 12:58 AM PDT, 34.300 N, 118.620 W, 7.5 km depth, Regional Network ID# ci14312160
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
5428 Etna 2592 CA:Chatsworth;Fire Station 96 USGS 34.2474 -118.6034 5.9 166 1 EpiSen 90 -51.9 3.010 7.87 2.00 0.1680
                  2 EpiSen 360 52.0 2.840 7.33 1.79 0.1380
                  3 EpiSen UP -19.2 0.597 3.85 0.27 0.0389
5425 Etna 2601 CA:Granada Hills;Porter Ranch FS 8 USGS 34.2772 -118.5597 6.0 114 1 EpiSen 135 148.0 4.770 25.20 1.49 0.1570
                  2 EpiSen 45 -130.0 4.030 10.10 2.49 0.1620
                  3 EpiSen UP 85.9 -2.360 14.60 1.20 0.0650
5426 Etna 2599 CA:Granada Hls;Knollwood FS 18 USGS 34.2897 -118.5011 10.9 95 1 EpiSen 90 22.0 0.892 3.73 0.83 0.0713
                  2 EpiSen 360 21.9 -0.775 3.83 0.53 0.0793
                  3 EpiSen UP 9.6 -0.327 1.59 0.61 0.0378
655 Etna 1939 CA:Sylmar;Jensen Flt Plant;Rsvr Roof MWD 34.3082 -118.5005 11.0 85 1 FBA-2g 22 34.4 -1.310 6.91 1.31 0.0900
                  2 FBA-2g UP -28.7 -0.522 4.22 0.51 0.0357
                  3 FBA-2g 112 47.4 2.150 7.86 2.13 0.1950
655 Etna 1938 CA:Sylmar;Jensen Flt Plant;Gen Bldg MWD 34.3129 -118.4989 11.2 82 1 FBA-2g 22 -19.9 1.200 4.14 1.30 0.0964
                  2 FBA-2g UP 13.5 0.588 4.95 0.46 0.0435
                  3 FBA-2g 112 18.9 -1.330 3.09 1.47 0.1320
655 Etna 1937 CA:Sylmar;Jensen Flt Plant;Admin Bldg MWD 34.3116 -118.4960 11.4 83 1 FBA-2g 22 -29.5 -1.250 7.33 1.68 0.1070
                  2 FBA-2g UP 15.6 -0.436 2.84 0.43 0.0346
                  3 FBA-2g 112 28.5 -2.090 8.67 2.27 0.1680
637 K2 4017 CA:Los Angeles;Sepulveda VA MC VA 34.2491 -118.4789 14.0 113 1 EpiSen 90 -18.8 -0.887 2.78 0.86 0.0466
                  2 EpiSen 360 -18.5 0.777 2.90 1.10 0.0776
                  3 EpiSen UP -11.7 -0.325 1.37 0.41 0.0271
5424 Etna 2595 CA:Reseda;Fire Station 100 USGS 34.1930 -118.5103 15.4 140 1 EpiSen 90 -28.4 -1.210 5.74 1.21 0.1700
                  2 EpiSen 360 -22.0 0.911 3.21 1.26 0.2300
                  3 EpiSen UP -13.7 0.447 1.70 1.06 0.0673
5432 Etna 2600 CA:Simi Valley;Fire Station 45 USGS 34.2694 -118.7827 15.4 258 1 EpiSen 85 33.1 -2.700 6.48 2.99 0.1970
                  2 EpiSen 355 39.6 -3.840 9.62 2.79 0.1990
                  3 EpiSen UP -16.7 0.538 3.76 0.55 0.0341
5423 Etna 2582 CA:Sylmar;Fire Station 91 USGS 34.3088 -118.4479 15.8 86 1 EpiSen 310 -13.6 0.764 4.44 1.13 0.0607
                  2 EpiSen 220 17.8 -1.010 4.58 0.82 0.0545
                  3 EpiSen UP 9.0 0.416 3.33 0.47 0.0299
5422 Etna 2591 CA:Van Nuys;Fire Station 39 USGS 34.1850 -118.4470 20.3 129 1 EpiSen 90 -9.8 0.642 1.53 1.04 0.0747
                  2 EpiSen 360 -12.7 0.630 1.84 1.37 0.1310
                  3 EpiSen UP -10.6 -0.247 1.83 0.25 0.0269
5421 Etna 2588 CA:L.A.;Mullholland FS 109 USGS 34.1307 -118.4921 22.0 148 1 EpiSen 90 -5.4 0.154 0.86 0.17 0.0190
                  2 EpiSen 360 9.9 -0.363 1.38 0.26 0.0165
                  3 EpiSen UP 7.5 0.158 0.77 0.06 0.0060
5431 Etna 2603 CA:Thousand Oaks;FS 34 USGS 34.2186 -118.8680 24.6 249 1 EpiSen 355 -20.0 -0.566 3.25 0.65 0.0451
                  2 EpiSen 265 9.4 0.394 1.39 0.33 0.0323
                  3 EpiSen UP -6.6 -0.242 0.80 0.23 0.0181
5439     CA:L.A.;MWD HQ Bldg MWD 34.0545 -118.2365 44.5 127                
  Etna 1316 Parking level 2           1 FBA-1g 190 -3.4 0.079 0.46 0.09 0.0159
      Parking level 2           2 FBA-1g UP 1.6 -0.066 0.43 0.07 0.0117
      Parking level 2           3 FBA-1g 280 -3.7 -0.105 0.40 0.14 0.0177
  Etna 1317 6th floor           1 FBA-1g 180 4.4 -0.235 1.03 0.33 0.0256
      6th floor           2 FBA-1g UP -8.3 0.222 0.57 0.07 0.0121
      6th floor           3 FBA-1g 270 5.2 0.226 0.80 0.28 0.0267
  Etna 1318 Roof level           1 FBA-1g 190 -4.6 -0.466 1.49 0.75 0.0609
      Roof level           2 FBA-1g UP 5.5 0.156 0.87 0.08 0.0122
      Roof level           3 FBA-1g 280 -4.9 0.469 1.32 0.85 0.0556
5029 K2 597 CA:Leona Valley;FS 140 USGS 34.6172 -118.2850 46.8 41 1 FBA-2g 360 -4.3 -0.205 1.12 0.24 0.0088
                  2 FBA-2g UP 2.5 0.166 0.82 0.15 0.0085
                  3 FBA-2g 90 -5.4 0.233 1.68 0.12 0.0109
482 K2 699 CA:Alhambra;LA Co Pub Works HQ USGS 34.0849 -118.1500 49.3 119                
      12th floor, center           1 FBA-11 360 -1.9 -0.219 0.36 0.18 0.0303
      12th floor, center           2 FBA-11 90 1.5 -0.235 0.25 0.24 0.0497
      12th floor, N end (bad sensor)           3 FBA-11 90          
      6th floor, center           4 FBA-11 90 -2.0 -0.151 0.44 0.11 0.0396
      6th floor, center           5 FBA-11 360 2.6 -0.157 0.51 0.10 0.0236
      6th floor, N end (bad sensor)           6 FBA-11 90          
      2nd floor, center           7 FBA-11 90 3.8 0.123 0.49 0.14 0.0236
      2nd floor, center           8 FBA-11 360 -4.8 -0.169 0.60 0.15 0.0131
      2nd floor, N end           9 FBA-11 90 2.9 0.133 0.43 0.15 0.0223
      Basement, center           10 FBA-11 360 -1.9 0.082 0.35 0.14 0.0113
      Basement, center           11 FBA-11 UP 1.2 -0.056 0.27 0.06 0.0077
      Basement, center           12 FBA-11 90 1.7 0.091 0.29 0.13 0.0213