Seismic monitoring and high-frequency noise using arrays in the Arabian Peninsula
- Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
- King Saud Univ., Riyadh (Saudi Arabia)
- Sultan Qaboos Univ., Muscat (Oman)
Seismic arrays provide useful tools for regional seismic monitoring. Two small-aperture, regionally-oriented arrays, QWAR and HQAR, were deployed in Saudi Arabia and Oman in 2012 and 2016. We utilize a time-domain beampacking method, similar to frequency-wavenumber analysis, to examine the performance of the arrays in terms of slowness and azimuthal bias and event detection capabilities. Additionally, we investigate persistent ambient noise sources recorded by the arrays. We find that the arrays provide slowness vectors with biases comparable with similar-sized arrays of the International Monitoring System in other locations around the world. At QWAR, regional events of magnitude 3.0 and above are detected a majority of the time, and as magnitudes increase to 4.0 and above, the detection rate is greater than 82%. Finally, strong noise generation, primarily with slownesses characteristic of Lg waves, is found in the directions of the northern Arabian/Persian Gulf and southern Red Sea and may be a factor in event detection capabilities.
- Research Organization:
- Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)
- Sponsoring Organization:
- USDOE National Nuclear Security Administration (NNSA)
- Grant/Contract Number:
- AC52-06NA25946; AC52-07NA27344
- OSTI ID:
- 1755831
- Report Number(s):
- LLNL-JRNL--808484; 1014470
- Journal Information:
- Arabian Journal of Geosciences, Journal Name: Arabian Journal of Geosciences Journal Issue: 19 Vol. 13; ISSN 1866-7511
- Publisher:
- Springer NatureCopyright Statement
- Country of Publication:
- United States
- Language:
- English
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