Response Spectra Station: Station GRPK Station Owner: California Strong Motion Instrumentation Program Station Latitude & Longitude: 41.1216, -121.9943 Earthquake: Ferndale Earthquake of 20 Dec 2022 Hypocentral Distance: 215.6 km Processing Info: CGS (Use the back button on your browser to return to the previous page)  Reconfigure Plots: % Damping 0251020 Accleration Units cm/s/s g Max Period (sec) Scale Factor for Data Overlay response spectrum:   None   UBC 1997 Help   Ca   Cv   IBC 2000   or    Ground-motion Help   SDS   SD1   Generic design spectrum Help   Max   Ca   T1   T2   T3  Component: 90 free field  PGA: 8.30 cm/s/s        standard   Home + Login + Download + About Us + Contact Earthquakes + stations + Search + Map + Advanced Search