Information for Strong-Motion Station
South San Francisco - 4-story Office Bld
CGS - CSMIP Station 58261
Earthquakes recorded by this station
(Station Photograph - click to enlarge)(Sensor Layout - click to see PDF File)
Latitude 37.6591 N
Longitude 122.4388 W
Elevation (m) 18
Site Geology Alluvium over rock (Franciscan)
Vs30 (m/sec) - -
Site Class D
Remarks/Notes Site information sources
No. of Stories above/below ground4/0
Plan ShapeRectangular
Base Dimensions144' x 197'
Typical Floor DimensionsSame as base dimensions
Design Date1972
Instrumentation1976. 11 accelerometers, on 4 levels in the building.
Vertical Load Carrying SystemMoment-resistant steel frame; 3-1/2" light-weight fill on metal decking (steel frames are distributed).
Lateral Force Resisting SystemMoment-resistant steel frame
Foundation TypeSpread footings on piles (50'-70' deep); 8" RC slab on grade
RemarksPotentially liquefiable site