Response Spectra Station: Hat Creek Radio Astronomy Obs., Cassel, Station Owner: University of California at Berkeley Station Latitude & Longitude: 40.8161, -121.4612 Earthquake: Petrolia Earthquake of 20 Dec 2021 Hypocentral Distance: 245.6 km Processing Info: CGS (Use the back button on your browser to return to the previous page)  Reconfigure Plots: % Damping 5 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: 0.96 cm/s/s        standard   Home + Login + Download + About Us + Contact Earthquakes + stations + Search + Map + Advanced Search