TY  - JOUR
AU  - Obrebski M J, Ardhuin F.
PY  - 2012//
TI  - How moderate sea states can generate loud seismic noise in the deep ocean
JO  - Geophysical Research Letters
SP  - L11601-
VL  - 39
IS  - 11
KW  - microseisms
KW  - polarization analysis
KW  - wave model
KW  - 4215 Climate and interannual variability
KW  - 4255 Numerical modeling
KW  - 4560 Surface waves and tides
KW  - 7220 Oceanic crust
KW  - 7255 Surface waves and free oscillations
KW  -
N2  - The location of oceanic sources of the micrometric ground displacement recorded at land stations in the 0.10.3 Hz frequency band (double frequency microseisms) is still poorly known. Here we use one particularly strong noise event in the Pacific to show that small swells from two distant storms can be a strong deep-water source of seismic noise, dominating temporarily the signals recorded at coastal seismic stations. Our interpretation is based on the analysis of noise polarization recorded all around the source, and the good fit achieved for this event and year-round between observed and modeled seismic data. The model further suggests that this is a typical source of these infrequent loud noise bursts, which supports previous inconclusive evidences of the importance of such sources. This new knowledge based on both modeling and observations will expand today's limits on the use of noise for climate studies and seismic imaging.
SN  - 1944-8007
UR  - http://dx.doi.org/10.1029/2012GL051896
N1  - exported from refbase (http://publi.ipev.fr/polar_references/show.php?record=3831), last updated on Wed, 03 Jul 2024 14:43:12 +0200
ID  - ObrebskiMJ2012
ER  -