2012 IRIS Workshop

Evaluation and Animation of Noise at SPREE Flexible Array and Transportable Array Stations

Emily Wolin: Northwestern University, Suzan van der Lee: Northwestern University

Animated noise spectra of 3 months of USArray SPREE station SM17 show expected diurnal variation and interesting features. As expected, noise around local midnight is typically less than around noon. This difference is most pronounced on the horizontal components at periods less than 0.3 s and greater than 30 s. Earthquakes (e.g. days 138 and 175) and mass recenterings (e.g. days 109, 179) produce infrequent, high-noise events.

Full-resolution graphics file in original format: 0095.gif

Acknoweldgements: This work was supported by NSF-EAR-0952345. SPREE (the Superior Province Rifting Earthscope Experiment) is a collaboration between PIs, researchers, and students from the University of Minnesota, University of Manitoba, Washington University in St. Louis, University of Quebec at Montreal, and Northwestern University. We thank PASSCAL personnel for their assistance in deployment, operation, and quality control of the SPREE network. Thanks to all SPREE station hosts.

Keywords: power_spectrum, noise, flexible_array, transportable_array

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