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Causal Instrument Corrections for Short-Period and Broadband Seismometers
Seismological Research Letters
  • Matthew M. Haney, U.S. Geological Survey
  • John Powers, U.S. Geological Survey
  • Michael West, University of Alaska Fairbanks
  • Paul Michaels, Boise State University
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Of all the filters applied to recordings of seismic waves, which include source, path, and site effects, the one we know most precisely is the instrument filter. Therefore, it behooves seismologists to accurately remove the effect of the instrument from raw seismograms. Applying instrument corrections allows analysis of the seismogram in terms of physical units (e.g., displacement or particle velocity of the Earth’s surface) instead of the output of the instrument (e.g., digital counts). The instrument correction can be considered the most fundamental processing step in seismology since it relates the raw data to an observable quantity of interest to seismologists. Complicating matters is the fact that, in practice, the term “instrument correction” refers to more than simply the seismometer. The instrument correction compensates for the complete recording system including the seismometer, telemetry, digitizer, and any anti‐alias filters.

Citation Information
Matthew M. Haney, John Powers, Michael West and Paul Michaels. "Causal Instrument Corrections for Short-Period and Broadband Seismometers" Seismological Research Letters (2012)
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