USGS/ANSS Backbone Noise Monitor
Click on a station to view PDF plots
ANSS Backbone Noise: Maps, Plots and movies
Animated Power Sprecta Distribution
US National Noise Maps
by Period
Global Noise Maps
by Period
Seasonal (secular) Variation
by Station
PDF Mode
PDF
90th%
Dailey (diurnal) Variation
by Station
PDF Mode
PDF 90th%
Backbone Installation Noise Tests:
PDF plots
Additional Noise PDFs available at the IRIS DMC
Permanent worldwide networks (II, IU, IM, UW, GE, GR, ...)
USarray stations
Methods and Interpretation of the noise PDFs
Updated: 05-Dec-04
Maintained by: Dan McNamara mcnamara@usgs.gov
USGS Advanced National Seismic System
URL http://geohazards.cr.usgs.gov
