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| (Station Photograph - click to enlarge) | (Sensor Layout - click to see PDF File) |
| CESMD |
| Information for Strong-Motion Station |
| Colton - 1-story School Gym |
| CGS - CSMIP Station 23540 |
| Earthquakes recorded by this station |
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| (Station Photograph - click to enlarge) | (Sensor Layout - click to see PDF File) |
| Latitude | 34.0721 N |
| Longitude | 117.3359 W |
| Elevation (m) | 311 |
| Site Geology | Deep alluvium |
| Vs30 (m/sec) | 279 (inferred) |
| Site Class | D |
| Remarks/Notes | Site information sources |
| No. of Stories above/below ground | 1/0 |
| Plan Shape | Rectangular |
| Base Dimensions | 165' x 109' |
| Typical Floor Dimensions | 165' x 109' |
| Design Date | 1973 |
| Instrumentation | 1988: 13 accelerometers, on 3 levels in the building. 2025: Reinstrumentation of building; 15 accelerometers on 3 levels in the buildng. |
| Vertical Load Carrying System | RC tilt-up bearing walls and cast-in-place columns with steel beams & girders and corrugated steel deck. |
| Lateral Force Resisting System | Tilt-up concrete shear walls with concrete columns around the perimeter. |
| Foundation Type | Spread RC footings and 4" RC slab on grade. |
| Remarks | -- |