U.S. Geological Survey - National Strong-Motion Program
WARNING
- WARNING: The USGS has recently become aware of a possible
error in the time scale of some strong-motion data digitized by an external contractor
from SMA-1 and CRA-1 records. At this time, the exact nature and magnitude of the possible
error have not been fully resolved, but initial indications are that it would be small and
perhaps negligible for most records. The USGS is working with the contractor to identify
the error and, if necessary, correct the affected data. Please check this site
periodically for updated information. (posted 97-08-15)
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