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A method to establish seismic noise baselines for automated station assessment

January 1, 2009

We present a method for quantifying station noise baselines and characterizing the spectral shape of out-of-nominal noise sources. Our intent is to automate this method in order to ensure that only the highest-quality data are used in rapid earthquake products at NEIC. In addition, the station noise baselines provide a valuable tool to support the quality control of GSN and ANSS backbone data and metadata. The procedures addressed here are currently in development at the NEIC, and work is underway to understand how quickly changes from nominal can be observed and used within the NEIC processing framework. The spectral methods and software used to compute station baselines and described herein (PQLX) can be useful to both permanent and portable seismic stations operators. Applications include: general seismic station and data quality control (QC), evaluation of instrument responses, assessment of near real-time communication system performance, characterization of site cultural noise conditions, and evaluation of sensor vault design, as well as assessment of gross network capabilities (McNamara et al. 2005). Future PQLX development plans include incorporating station baselines for automated QC methods and automating station status report generation and notification based on user-defined QC parameters. The PQLX software is available through the USGS (http://earthquake. usgs.gov/research/software/pqlx.php) and IRIS (http://www.iris.edu/software/ pqlx/).

Citation Information

Publication Year 2009
Title A method to establish seismic noise baselines for automated station assessment
DOI 10.1785/gssrl.80.4.628
Authors D.E. McNamara, C. R. Hutt, L.S. Gee, H.M. Benz, R.P. Buland
Publication Type Article
Publication Subtype Journal Article
Series Title Seismological Research Letters
Series Number
Index ID 70036709
Record Source USGS Publications Warehouse
USGS Organization

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