Figure 5. Horizontal component spectra
from the seafloor, buried, and borehole installations at the Ocean Seismic Network
site (OSN-1) are compared to the spectra from the buried installation at the
Hawaii-2 Observatory (H2O) and from the Kipapa, Hawaii (KIP), Global Seismic
Network station on Oahu. The sediment resonance peaks in the band 0.3 to 8Hz
are up to 35dB louder than background levels and far exceed the microseism peak
at 0.1 to 0.3Hz. That the resonance peaks are considerably higher for horizontal
components than for vertical components is consistent with the notion that these
are related to shear wave resonances (or Scholte modes).
Retun to the 2003 Fall AGU Poster
BROADBAND SEISMIC OBSERVATIONS AT THE HAWAII-2 OBSERVATORY DURING ODP LEG 200