Fig. 8
From: Seismic noise between 0.003 Hz and 1.0 Hz and its classification
(Top panel) Seismic data (PSD) from station STC in California (bottom panel) for two weeks from May 1 to May 15 in 2011. The frequency range (vertical axis) is from 0 to 1 Hz. White indicates high amplitude (PSD) and dark blue indicates low amplitude. (Second panel) Ocean wave spectra at buoy 46,053 of the same period (May 1–15). The frequency range (vertical) is from 0 to 0.5 Hz as this was the only available range. White indicates high amplitude and dark blue indicates small. (Third panel) Wind speed (blue line) and wind direction data at buoy 46,053. Wind direction (scale on right) is relatively constant at about 270 deg which means the westerly winds dominate most of the time. The scale for wind speeds is on the left (vertical axis). (Bottom panel) The locations of buoy 46,053 (red) and station STC (blue)