Information for Strong-Motion Station
Norwalk; 12440 Imperial Highway
NSMP Station 5239
Earthquakes recorded by this station
(Station Photograph - click to enlarge)(Sensor Layout - click to see PDF File)
Latitude 33.9164 N
Longitude 118.0664 W
Elevation (m) 33
Site Geology  
Vs30 (m/sec)  
Site Class  
No. of Stories above/below ground7/1
Plan ShapeRectangular
Base Dimensions130ft x 463ft
Typical Floor Dimensions130ft x 463ft
Design Date1980
Instrumentation1983, currently 24 accelerometers on 5 levels of the building. There thee free-fiedl tstaions on the North and South of the building.
Vertical Load Carrying System2.5-inch thick Concrete slab over 3-inch metal deck supported by steel beams and columns
Lateral Force Resisting SystemSteel moment frame
Foundation TypeReinforced concrete spread foundations supported by piles