Seismic-Acoustic Active Range Monitoring for Characterizing Low-Order Ordnance Detonation
ENGINEERING RESEARCH AND DEVELOPMENT CENTER HANOVER NH COLD REGIONS RESEARCH AND ENGINEERING LAB
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A seismic-acoustic field data acquisition experiment was conducted in March 2005 to support the ERDC Environmental Quality program, Distributed Source focus area. The Distributed Sources focus area strives to characterize the level of contamination in range environments attributed to ordnance residue for the purpose of range management and environmental remediation. This remote sensing research project emphasizes seismic magnitude measurements and subsequent inference of partial detonations and unexploded ordnance. The analysis of these data will help establish seismic-acoustic measurement criteria for remotely sensed seismic data to enable near-real time estimates of the seismic source characteristics of ordnance explosions, including level of detonation and location. We collected seismic and acoustic array data from Yuma Proving Ground from 7 to 18 March 2005. Three sensor nodes were set up over approximately 16-km2 areas that encompassed partial or full impact regions. We employed both seismic and acoustic arrays with accompanying meteorological stations. The dual mode of acoustic and seismic monitoring is seen to have great benefit in discerning acoustic arrival from the seismically propagated energies. Acoustic arrivals that are attributed to ordnance detonation or muzzle blast are observed on both the seismic sensors and microphones with an extremely high signal-to-noise ratio. The experimental data acquisition of March 2005 provided a catalogue of waveforms that help to define the seismic and acoustic phase energy observed at several kilometers for sensor offset and a source scale of artillery ordnance magnitude.
- Ammunition and Explosives
- Radiofrequency Wave Propagation