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Figure F13. Vertical component spectra from the seafloor, buried, and borehole installations at Site OSN-1 are compared with the spectra from the buried installation at Site H2O and the KIP GSN station on Oahu. Site H2O has extremely low noise levels above 5 Hz and near the microseism peak from 0.1 to 0.3 Hz. Site H2O has high noise levels below 50 mHz. Otherwise, Site H2O levels are comparable to the OSN borehole and KIP (Kipapa, Hawaii) levels. The sediment resonances at Site H2O near 1 and 3 Hz are very prominent.

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