Seismic Threshold Determination

• Main Authors: Von Seggern, David, Blandford, Robert
• Other Authors: TELEDYNE GEOTECH ALEXANDRIA VA SEISMIC DATA ANALYSIS CENTER
• Format: Text
• Language: English
• Published: 1974
• Subjects: Seismology; Seismic Detection and Detectors; *SEISMIC DETECTION; *UNDERGROUND EXPLOSIONS; CORRELATION TECHNIQUES; EARTHQUAKES; INTENSITY; MONTANA; MONTE CARLO METHOD; NUCLEAR EXPLOSIONS; PREDICTIONS; PROBABILITY DENSITY FUNCTIONS; SEISMIC WAVES; SEISMOLOGICAL STATIONS; SIGNAL TO NOISE RATIO; SIMULATION; Vela Uniform; Seismic discrimination; Large aperture seismic array; Kamchatka
• Online Access: http://www.dtic.mil/docs/citations/ADA010143; http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=ADA010143

Problems in accurate determination of seismic threshold magnitude are analytically tractable for only some simple, but interesting, cases. This report gives these analytic results and proceeds to a simulation experiment to provide insights where analytic predictions are not possible. Differences in direct, incremental, and cumulative threshold determinations; distinctions between true and observed thresholds; effects of correlated signals and noise; feedback between LR and P thresholds; and estimation of (M sub s)-(m sub b) relationships are treated in this simulation experiment. A comparison of simulated detection results is made with real data from LASA on the Kamchatka- Kurile region and good agreement is obtained between predictions and observations.