Figure 4. Vertical component spectra from the seafloor, buried, and borehole installations at the Ocean Seismic Network site (OSN-1) are compared with the spectra from the buried installation at the Hawaii-2 Observatory (H2O) and from the Kipapa, Hawaii (KIP), Global Seismograph Network station on Oahu. The H2O site has comparable noise levels to the OSN seafloor and shallow buried stations near and above the microseism peak. Below 50mHz the noise levels of the buried sensor at H2O are comparable to the seafloor sensor at OSN-1. The sediment resonances in the H2O spectrum near 1.1 and 2.3Hz are prominent. The peak near 0.2Hz may also be effected by sediment resonances. We would expect these to decrease substantially for a borehole sensor.

Retun to the 2003 Fall AGU Poster

BROADBAND SEISMIC OBSERVATIONS AT THE HAWAII-2 OBSERVATORY DURING ODP LEG 200