Each of these maps were produced assuming firm rock soil conditions at 760 m/sec.

Region Spectral Acceleration Return Period Format
California/Nevada Peak Ground Acceleration 10% in 50 years [ PNG | PDF ]
California/Nevada Peak Ground Acceleration 2% in 50 years [ PNG | PDF ]
California/NevadaPeak Ground Acceleration5% in 50 years[ PNG | PDF ]
California/Nevada0.2 second SA (5 Hz)10% in 50 years[ PNG | PDF ]
California/Nevada0.2 second SA (5 Hz)2% in 50 years[ PNG | PDF ]
California/Nevada0.2 second SA (5 Hz)5% in 50 years[ PNG | PDF ]
California/Nevada0.3 second SA (3.33 Hz)10% in 50 years[ PNG | PDF ]
California/Nevada0.3 second SA (3.33 Hz)2% in 50 years[ PNG | PDF ]
California/Nevada0.3 second SA (3.33 Hz)5% in 50 years[ PNG | PDF ]
California/Nevada1.0 second SA (1.0 Hz)10% in 50 years[ PNG | PDF ]
California/Nevada1.0 second SA (1.0 Hz)2% in 50 years[ PNG | PDF ]
California/Nevada1.0 second SA (1.0 Hz)5% in 50 years[ PNG | PDF ]
Central/Eastern USPeak Ground Acceleration10% in 50 years[ PNG | PDF ]
Central/Eastern USPeak Ground Acceleration2% in 50 years[ PNG | PDF ]
Central/Eastern USPeak Ground Acceleration5% in 50 years[ PNG | PDF ]
Central/Eastern US0.2 second SA (5 Hz)10% in 50 years[ PNG | PDF ]
Central/Eastern US0.2 second SA (5 Hz)2% in 50 years[ PNG | PDF ]
Central/Eastern US0.2 second SA (5 Hz)5% in 50 years[ PNG | PDF ]
Central/Eastern US0.3 second SA (3.33 Hz)10% in 50 years[ PNG | PDF ]
Central/Eastern US0.3 second SA (3.33 Hz)2% in 50 years[ PNG | PDF ]
Central/Eastern US0.3 second SA (3.33 Hz)5% in 50 years[ PNG | PDF ]
Central/Eastern US1.0 second SA (1.0 Hz)10% in 50 years[ PNG | PDF ]
Central/Eastern US1.0 second SA (1.0 Hz)2% in 50 years[ PNG | PDF ]
Central/Eastern US1.0 second SA (1.0 Hz)5% in 50 years[ PNG | PDF ]
Conterminous USPeak Ground Acceleration10% in 50 years[ PNG | PDF ]
Conterminous USPeak Ground Acceleration2% in 50 years[ PNG | PDF ]
Conterminous USPeak Ground Acceleration5% in 50 years[ PNG | PDF ]
Conterminous US0.2 second SA (5 Hz)10% in 50 years[ PNG | PDF ]
Conterminous US0.2 second SA (5 Hz)2% in 50 years[ PNG | PDF ]
Conterminous US0.2 second SA (5 Hz)5% in 50 years[ PNG | PDF ]
Conterminous US0.3 second SA (3.33 Hz)10% in 50 years[ PNG | PDF ]
Conterminous US0.3 second SA (3.33 Hz)2% in 50 years[ PNG | PDF ]
Conterminous US0.3 second SA (3.33 Hz)5% in 50 years[ PNG | PDF ]
Conterminous US1.0 second SA (1.0 Hz)10% in 50 years[ PNG | PDF ]
Conterminous US1.0 second SA (1.0 Hz)2% in 50 years[ PNG | PDF ]
Conterminous US1.0 second SA (1.0 Hz)5% in 50 years[ PNG | PDF ]

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