Fusing geophysical signatures of locally recorded surface explosions to improve blast detection. Issue 3 (3rd February 2016)

• Record Type: Journal Article
• Authors: Carmichael, Joshua D.; Nemzek, Robert; Arrowsmith, Stephen; Sentz, Kari
• Is Part Of: Geophysical journal international. Volume 204:Issue 3(2016:Mar.)
• Page Start: 1838
• Page End: 1842
• Publication Date: 2016-02-03
• Subjects: Probability distributions -- Electromagnetic theory -- Controlled source seismology -- Statistical seismology -- Wave propagation -- Acoustic properties; Geophysics -- Periodicals; 550
• DOI: 10.1093/gji/ggw006
• Languages: English
• ISSNs: 0956-540X

Abstract

Abstract: We recorded acoustic, seismic and radio-frequency signatures of 70 solid charge (∼2–12 kg) surface explosions (shots) at local distances (0.1–1.5 km) to determine if such signals could be fused for blast monitoring. We observed that each geophysical signature was sufficiently repeatable between similar shots to be identifiable with multichannel correlation detectors. Using template signals from a large explosion, we then processed heavily contaminated data recording a smaller shot with these detectors, and missed or marginally detected the resultant target signals. By then fusing the p -values of these statistics through Fisher's combined probability test, we clearly identified the same explosion signals at thresholds consistent with the false alarm on noise rates of the correlation detectors. This resulting Fisher test thereby provided high-probability detections, zero false alarms and higher theoretical detection capability.