Information for Strong-Motion Station
San Jose - 18-story City Hall
CGS - CSMIP Station 57318
Earthquakes recorded by this station
(Station Photograph - click to enlarge)(Sensor Layout - click to see PDF File)
Latitude 37.3377 N
Longitude 121.8850 W
Elevation (m) 25
Site Geology Deep alluvium
Vs30 (m/sec) - -
Site Class D
Remarks/Notes Site information sources
No. of Stories above/below ground 18/1
Plan ShapeIrregular
Base Dimensions270 x 171 ft
Typical Floor Dimensions270 x 83 ft
Design Date2002
Instrumentation2007, 21 accelerometers on 6 levels.
Vertical Load Carrying SystemConcrete slabs over steel decks supported by steel beams and columns, and concrete shear walls.
Lateral Force Resisting SystemConcrete shear walls in the transverse direction. A single row of steel moment frame and concrete shear walls in the longitudinal direction.
Foundation TypeConcrete shear walls and steel columns supported by concrete pile foundations and 24" concrete mat foundation.