TRACE DATA - For engineers, seismologists, and seismologists-in-training. Trace data consists of digital samples from seismometers. Sample rates are usually 50-100 samples/sec, and the files are large. File formats vary, use appropriate software.

• IRIS Data Management Center - Archives all PNSN Trace Data
  1980 - Present (delayed about 6 months)
  Caveat: These files are in SEED format, and may be large.

• Older trace data (before 1980) is available in analog format archived in the UW Library Special Collections. These include both paper helicorder records and film devolocorder records.

• PNSN Strong Motion Parameters - 1997-2000
• ShakeMap - Instrumental Shaking from PNSN real-time instrumentation - Includes Strong Motion Parameters

• PNSN Nisqually Earthquake Page
• ShakeMap - Nisqually EQ; Instrumental Intensity, PGA, PGV, and Spectral Response.
• Community Intensity Maps - based on felt reports
• Time Series Data:
  • PNSN. (See the readme.explanation and readme2 for format description.)
  • USGS Seattle Urban Seismic Array
  • USGS NSMP
• Summary Data (PGA, PGV)
  • PNSN
  • USGS NSMP.
• Strong-motion Amplification Maps of the Tumwater and Lacey Quadrangles From the Washington Dept. of Natural Resources
Webicorder Archive.