Figure 8
From: Identification of natural and anthropogenic signals in controlled source seismic experiments
(a) Raw data for stations C500-C600, including the helicopter and airplane signals discussed in previous sections (thin blue arrows). Thick green arrows mark some examples of the wind gusts. (b) Subset of traces C540–C544 showing with grey boxes some of the wind gusts. (c) Spectrograms for traces C541 and C544), separated by 1.3 km. Intervals with blowing winds appear as bands of increased energy, better identified at frequencies above 20–40 Hz (color scale as in Figs. 3 and 4).
