Seismic signal processing optimized for a specific source and receiver
A seismic signal processing procedure is designed so that its performance is optimized for a specific seismic array looking for explosions at a specific teleseismic location. In this report we first describe the processing procedure, which essentially estimates beamformer signal power as a function of time in a specified frequency band. Then we calibrate the procedure for the Norwegian Regional Seismic array (NRSA) in terms of equivalent body magnitude'' (emb) level versus signal power using US Department of Interior/Geological Survey (USGS) epicenter data from documented explosions at the USSR Semipalatinsk test area in Eastern Kazakh. Finally, we test the performance of the procedure on actual NRSA data and estimate that explosions above approximately mb 4.0 at Semipalatinsk correspond with an event rate in the emb signal on the order of one to ten events per hour. We conclude that, to detect and analyze events around the clock at levels below mb 4.0, an automatic event locator must be used to process the output of the procedure described here. 8 refs., 19 figs., 1 tab.
- Research Organization:
- Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
- Sponsoring Organization:
- DOE/ER
- DOE Contract Number:
- AC04-76DP00789
- OSTI ID:
- 7011065
- Report Number(s):
- SAND-90-0462; ON: DE90010189
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
45 MILITARY TECHNOLOGY, WEAPONRY, AND NATIONAL DEFENSE
58 GEOSCIENCES
47 OTHER INSTRUMENTATION
NUCLEAR EXPLOSIONS
DETECTION
RECORDING SYSTEMS
DESIGN
SEISMIC EVENTS
MEASURING METHODS
TREATIES
VERIFICATION
TECHNOLOGY ASSESSMENT
DATA PROCESSING
MONITORING
PERFORMANCE TESTING
RESPONSE FUNCTIONS
SIGNAL CONDITIONING
SIGNAL-TO-NOISE RATIO
STATISTICAL MODELS
UNDERGROUND EXPLOSIONS
USSR
WAVE PROPAGATION
ASIA
EASTERN EUROPE
EUROPE
EXPLOSIONS
FUNCTIONS
MATHEMATICAL MODELS
PROCESSING
TESTING
350300* - Arms Control- Verification- (1987-)
450300 - Military Technology
Weaponry
& National Defense- Nuclear Explosion Detection
580000 - Geosciences
440800 - Miscellaneous Instrumentation- (1990-)