Location of high-frequency P wave microseismic noise in the Pacific Ocean using multiple small aperture arrays
Abstract
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.
- Authors:
-
- Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
- Univ. of Utah, Salt Lake City, UT (United States)
- Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
- Publication Date:
- Research Org.:
- Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States); Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
- Sponsoring Org.:
- USDOE
- OSTI Identifier:
- 1184169
- Alternate Identifier(s):
- OSTI ID: 1321755; OSTI ID: 1402298
- Report Number(s):
- LLNL-JRNL-667212; LA-UR-15-21040
Journal ID: ISSN 0094-8276
- Grant/Contract Number:
- AC52-07NA27344; AC52-06NA25396
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Geophysical Research Letters
- Additional Journal Information:
- Journal Volume: 42; Journal Issue: 8; Journal ID: ISSN 0094-8276
- Publisher:
- American Geophysical Union
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 58 GEOSCIENCES; seismology; p-waves; noise; back-projection
Citation Formats
Pyle, Moira L., Koper, Keith D., Euler, Garrett G., and Burlacu, Relu. Location of high-frequency P wave microseismic noise in the Pacific Ocean using multiple small aperture arrays. United States: N. p., 2015.
Web. doi:10.1002/2015GL063530.
Pyle, Moira L., Koper, Keith D., Euler, Garrett G., & Burlacu, Relu. Location of high-frequency P wave microseismic noise in the Pacific Ocean using multiple small aperture arrays. United States. https://doi.org/10.1002/2015GL063530
Pyle, Moira L., Koper, Keith D., Euler, Garrett G., and Burlacu, Relu. Mon .
"Location of high-frequency P wave microseismic noise in the Pacific Ocean using multiple small aperture arrays". United States. https://doi.org/10.1002/2015GL063530. https://www.osti.gov/servlets/purl/1184169.
@article{osti_1184169,
title = {Location of high-frequency P wave microseismic noise in the Pacific Ocean using multiple small aperture arrays},
author = {Pyle, Moira L. and Koper, Keith D. and Euler, Garrett G. and Burlacu, Relu},
abstractNote = {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.},
doi = {10.1002/2015GL063530},
journal = {Geophysical Research Letters},
number = 8,
volume = 42,
place = {United States},
year = {Mon Apr 20 00:00:00 EDT 2015},
month = {Mon Apr 20 00:00:00 EDT 2015}
}
Web of Science
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