Information for Strong-Motion Station
Palo Alto; Channing House; Structure Array
NSMP Station 1811
Earthquakes recorded by this station
(Station Photograph - click to enlarge)(Sensor Layout - click to see PDF File)
Latitude 37.4464 N
Longitude 122.1540 W
Elevation (m) 13
Site Geology  
Vs30 (m/sec)  
Site Class  
No. of Stories above/below ground10/1
Plan Shapeirregular (2 wings that meet in a wide V)
Base DimensionsTwo 180 ftx70 ft wings
Typical Floor DimensionsTwo 180 ftx70 ft wings
Design Date1966
Instrumentation2001, 30 accelerometers on three levels of building.
Vertical Load Carrying SystemConcrete slab supported by reinforced beams and columns.
Lateral Force Resisting SystemOriginally a non-ductile reinforced concrete frame system with shear walls at both ends of the building and center core.
Foundation TypeSpread foundation
RemarksThe building was retrofitted in 1991 with a total of 120 base isolators