Infrasound Signal Characteristics from Small Earthquakes
In: DTIC; (2010)
Online
Elektronische Ressource
Understanding the source properties responsible for infrasound generation is critical to developing a seismo-acoustic data discriminant to distinguish between near-surface explosions and earthquakes. The regional seismicity, complex topography, open-pit quarries, and subsurface mining in the Utah region create a unique setting for the study of near-field infrasound. The Utah network has been operating three permanent infrasound arrays collocated with seismic stations NOQ (2006), BGU (2007), and EPU (2007). Additionally, four new arrays were installed and collocated with existing seismic stations BRPU, FSUT, HWUT, and WMUT. This summer three additional arrays will be collocated at stations LCMT, PSUT, and RCJ. Each array consists of four infrasound sensors with an average spacing of 100 m, recording at 100 samples/s, and all data is telemetered to the University of Utah in near-real-time. This increased array coverage provides greater likelihood for independent locations of infrasound sources using crossing backazimuth estimates. The data from the arrays are being processed with InfraMonitor which generates lists of detections and catalogs of located infrasound sources. Once processing is complete, the detections will be used to correlate and model the infrasound generation by earthquakes utilizing preexisting earthquake scaling relations dependent on depth, magnitude, and mechanism. The observations made during this study will contribute to refining the source excitation model for infrasound.
Published in Proceedings of the 2010 Monitoring Research Review - Ground-Based Nuclear Explosion Monitoring Technologies, 21-23 September 2010, Orlando, FL. Volume II. Sponsored by the Air Force Research Laboratory (AFRL) and the National Nuclear Security Administration (NNSA). U.S. Government or Federal Rights License
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Infrasound Signal Characteristics from Small Earthquakes
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Quelle: | DTIC; (2010) |
Veröffentlichung: | 2010 |
Medientyp: | Elektronische Ressource |
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