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Ambient noise spectrum showing magnitude of earth's vibration.

Ambient noise spectrum showing magnitude of earth's vibration.
Ambient noise spectrum showing magnitude of earth's vibration.
Ambient noise spectrum showing magnitude of earth's vibration.
Ambient noise spectrum showing magnitude of earth's vibration.
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598760
Cook, John E.
Ambient noise spectrum showing magnitude of earth's vibration.
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01/01/1998
RASfig7.jpg
Date is approximate.
Caption from Oceanus magazine, Vol. 41, No. 1, Pg. 36:
This “ambient noise spectrum” shows the magnitude of the earth’s vibration in the frequency band from 0.001 hertz to 10 hertz for the vertical (Z) and two horizontal (H1 and H2) components of the borehole seismometer at OSN-1. The black dashed lines show the range of typical levels for land stations. Around 0.1 hertz and below 0.01 hertz for the horizontals, the seafloor station is as noisy as the noisiest land stations. Between 0.01 and 0.1 hertz on the vertical component and all components near 10 hertz the seafloor station is as quiet as the quietest land stations.
Illustration by Jack Cook
© Woods Hole Oceanographic Institution
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