Causal Instrument Corrections for Short-Period and Broadband Seismometers

Matthew M. Haney, John Powers, Michael West, Paul Michaels

Research output: Contribution to journalArticlepeer-review

Abstract

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.

Original languageAmerican English
JournalCGISS Publications and Presentations
StatePublished - 1 Sep 2012

EGS Disciplines

  • Earth Sciences
  • Geophysics and Seismology

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