Information for Strong-Motion Station
Alhambra; LA County Public Works Hdqtrs
NSMP Station 0482
Earthquakes recorded by this station
(Station Photograph - click to enlarge)(Sensor Layout - click to see PDF File)
Latitude 34.0849 N
Longitude 118.1500 W
Elevation (m) tbd
Site Geology  
Vs30 (m/sec)  
Site Class  
No. of Stories above/below ground12/1
Plan Shaperegular
Base Dimensions165 x 165 ft
Typical Floor Dimensions165 x 165 ft
Design Date1969
Instrumentation1971, 12 accelerometers on four levels of building.
Vertical Load Carrying SystemLightweight concrete slab over metal decking floor without shear studs supported by steel beams and columns.
Lateral Force Resisting SystemPerimeter welded steel moment frames above the second floor, and massive reinforced concrete piers below the second floor.
Foundation TypeReinforced concrete spread footings with strip footings under the basement walls
RemarksThe building was initially instrumented in 1971 according to the UBC recommendations (triaxial accelerometers at there levels: the basement, sixth, and 12th floors). The current instrumentation has been deployed since the 1989. Reference: Rodgers, Janise E., Ahmet K. Sanli, and Mehmet «elebi.†Seismic response analysis of a 13-story steel moment-framed building in Alhambra, California. US Geological Survey, 2004, https://pubs.usgs.gov/of/2004/1338/.