Information for Strong-Motion Station
Pomona - 2-story Commercial Bldg
CGS - CSMIP Station 23511
Earthquakes recorded by this station
(Station Photograph - click to enlarge)(Sensor Layout - click to see PDF File)
Latitude 34.0563 N
Longitude 117.7497 W
Elevation (m) 257
Site Geology Deep alluvium
Vs30 (m/sec) 287 (measured)
Site Class D
Remarks/Notes Site information sources
No. of Stories above/below ground2/1
Plan ShapeRectangular
Base Dimensions100' x 120'
Typical Floor DimensionsSame as base dimensions
Design Dateapprox. 1971
Instrumentation1986. 10 accelerometers, on 3 levels in the building. 3 accelerometers at a reference free-field site.
Vertical Load Carrying SystemReinforced concrete slab supported on concrete beams and columns.
Lateral Force Resisting SystemReinforced concrete slab diaphragm and perimeter ductile concrete moment resisting frame.
Foundation TypeCast-in-place concrete piles