USGS National-Strong Motion Project
Preliminary Corrected Peak Ground Acceleration and Velocity and Pseudo-Spectral Acceleration Values for
November 18, 2011, Okanogan, Washington Earthquake (posted 12/02/2011)
ML 4.7, 11/18/2011, 13:09 UTC, 11/18/2011, 05:09 AM PST, 48.4435 N, 119.5895 W, 12.95 km depth, Regional Network ID# uw60346132
Sta Inst Inst State: City; Recorder Location Owner Lat Lon Dist Az Ch Sensor Orient PGA PGV PSA 5% damping %g
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
2161 K2 1535 WA:Chief Joseph Dam ACOE 47.9949 -119.6347 52.8 182                
      Upper Gallery           1 EpiSen 198 -19.8 0.179 0.176 0.0151 0.00155
      Upper Gallery           2 EpiSen 108 23.3 -0.241 0.315 0.0225 0.00198
      Upper Gallery           3 EpiSen UP -14.1 0.153 0.093 0.0159 0.00123
      Lower Gallery           4 EpiSen 198 4.1 0.043 0.090 0.0124 0.00064
      Lower Gallery           5 EpiSen 108 6.1 -0.063 0.151 0.0144 0.00093
      Lower Gallery           6 EpiSen UP -4.4 0.058 0.066 0.0148 0.00094