Power Spectral Density of Noise Background at GSN stations In the figures below, the black dots are plots of the individual station 1st-percentile spectral estimates of vertical components. The blue line is the GSN 1st-percentile noise model. The red line is represents the GSN median noise model. 95% of the GSN has lower spectral estimates than this curve. Only those stations for which the IRIS DMC had over 50% of the data for the year July 2001 through June 2002 are included in this study. See: Berger et al (2004) "Ambient Earth Noise: A survey of the Global Seismographic Network", JGR 109 B11307 (1.1 Mbytes). The model itself can be found here. The following are the results for each station: AAK ABKT ADK ALE ANMO ARU ASCN BFO BJT BORG BRVK CCM CHTO CMB CMLA COCO COLA COR CTAO DWPF EFI ENH ERM ESK FFC FURI GNI GRFO GUMO H2O HIA HKT HNR HOPE HRV INCN JOHN KBS KDAK KEV KIEV KIP KIV KMI KONO KURK KWAJ LCO LSA LSZ LVZ MA2 MAJO MBAR MDJ MSEY NNA NWAO OBN OTAV PAB PAS PAYG PET PFO PMG PMSA PTCN PTGA QIZ QSPA RAYN RCBR RPN RSSD SACV SBA SDV SFJ SHEL SJG SNZO SPA SSE SUR TATO TAU TIXI TLY TRQA TSUM TUC WAKE WMQ WRAB XAN YAK YSS