The Nevada Seismic Array (NVAR) Regional Seismo-Acoustic Studies
SOUTHERN METHODIST UNIV DALLAS TX
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Studies are underway at the Southern Methodist University Geophysics Laboratory to identify seismoacoustic sources located at regional distances from the Nevada Seismic Array NVAR. The objective of this project is to evaluate the seismo-acoustic method for the identification of mine blasts as well as other type of vented explosions. The studies involve the processing and analysis of regional seismic and seismoacoustic data acquired at NVAR during selected daily intervals for a period of one year. Our assessment of the initial results of the studies show that NVAR is surrounded by regional seismo-acoustic sources. The most active seismo-acoustic source is found near Hawthorne, NV where sequences of signals are generated several times a week. In addition, multiple seismo-acoustic sources are located within the CarlinBattle Mountains gold mining district in north central NV. Occasional seismo-acoustic signal generated by sources in western Utah and northwestern Arizona were also observed. Additional studies are underway to calibrate NVAR to locate events on the Nevada Test Site.