Information for Strong-Motion Station
Santa Monica - St Johns Hospital
CGS - CSMIP Station 24202
Earthquakes recorded by this station
(Station Photograph - click to enlarge)(Sensor Layout - click to see PDF File)
Latitude 34.0310 N
Longitude 118.4790 W
Elevation (m) 44
Site Geology Deep alluvium
Vs30 (m/sec) 343 (measured)
Site Class D
Remarks/Notes Site information sources
No. of Stories above/below ground5/1 (IP); 4/1(D&T)
Plan ShapeIrregular (IP); Rectangular (D&T)
Base Dimensions457 x 315 ft
Typical Floor Dimensions315 x 190 ft (IP); 288 x 263 ft (D&T)
Design Date1999
Instrumentation2003, 18 sensors on 4 levels in Inpatient Bldg. plus 3 sensors at a reference free-field site; 2009, 6 sensors on 2 levels in D&T Bldg.
Vertical Load Carrying SystemConcrete fill over steel deck on steel beams and columns supported on rubber bearings
Lateral Force Resisting SystemConcentrically-braced steel frames (above Level 1) and concrete shear walls (below Level 1) isolated by rubber bearings with lead cores and slider bearings at the base. Two buildings have the same base slab supported on bearings, but are separated at floors above the base with seismic joints.
Foundation TypeConcrete spread footings with grade beams.
RemarksStructural design was based on the 1995 California Building Code. Funding for instrumentation was provided by the owner as required by OSHPD. CSMIP provided assistance in instrumentation.