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Title: Location of high-frequency P wave microseismic noise in the Pacific Ocean using multiple small aperture arrays

Journal Article · · Geophysical Research Letters
DOI:https://doi.org/10.1002/2015GL063530· OSTI ID:1184169
 [1];  [2];  [3];  [2]
  1. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
  2. Univ. of Utah, Salt Lake City, UT (United States)
  3. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
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We investigate source locations of P wave microseisms within a narrow frequency band (0.67–1.33 Hz) that is significantly higher than the classic microseism band (~0.05–0.3 Hz). Employing a backprojection method, we analyze data recorded during January 2010 from five International Monitoring System arrays that border the Pacific Ocean. We develop a ranking scheme that allows us to combine beam power from multiple arrays to obtain robust locations of the microseisms. Some individual arrays exhibit a strong regional component, but results from the combination of all arrays show high-frequency P wave energy emanating from the North Pacific basin, in general agreement with previous observations in the double-frequency (DF) microseism band (~0.1–0.3 Hz). Furthermore, this suggests that the North Pacific source of ambient P noise covers a broad range of frequencies and that the wave-wave interaction model is likely valid at shorter periods.

Research Organization:
Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States); Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
Sponsoring Organization:
USDOE
Grant/Contract Number:
AC52-07NA27344; AC52-06NA25396
OSTI ID:
1184169
Alternate ID(s):
OSTI ID: 1321755; OSTI ID: 1402298
Report Number(s):
LLNL-JRNL-667212; LA-UR-15-21040
Journal Information:
Geophysical Research Letters, Vol. 42, Issue 8; ISSN 0094-8276
Publisher:
American Geophysical UnionCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 16 works
Citation information provided by
Web of Science

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Cited By (4)

Matched Field Processing of Three-Component Seismic Array Data Applied to Rayleigh and Love Microseisms journal August 2018
Body waves from a single source area observed in noise correlations at arrival times of reflections from the 410 discontinuity journal May 2018
Ambient seismic noise wavefield in Japan characterized by polarization analysis of Hi-net records journal September 2018
Matched Field Processing of Three-Component Seismic Array Data Applied to Rayleigh and Love Microseisms text January 2018

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Related Subjects

58 GEOSCIENCES
seismology
p-waves
noise
back-projection