Evaluation of the performance during the gse technical test. Technical report, 1 January-30 June 1986

Technical Report · Tue Jul 01 04:00:00 EDT 1986

OSTI ID:7248737

Campanella, A; Israelsson, H; Jurkevics, A; Dysart, P; Pullin, J

Continuing evaluations of the Center's performance during the GSE Technical Test led to improvements in the automatic association program and verified that the automatic signal detector flagged all expected seismic P-waves. Research on methods for the analysis of seismic data resulted in demonstration of promising methods for identifying pp by polarization filtering and a correlation method. Polarization filtering was applied to two events near the Aral Sea and helped determine that complications in the signals at NORESS were not due to a multiple explosive source. Another investigation of regional events recorded at NORESS revealed spectral differences that could be used to discriminate between earthquakes and explosions in a limited source region. Network capability studies demonstrated agreement between SNAP/D estimates and results from a network in the Baikal region, as well as possible effects of source radiation patterns on station detection thresholds. Analysis of explosion generated and synthetic waveforms showed that waveform periods and shapes can be used to constrain estimates of t*, and illustrated the strong dependence of t* estimates on assumptions about near-source conditions.

• Research Organization: Science Applications International Corp., Arlington, VA (USA)
• OSTI ID: 7248737
• Report Number(s): AD-A-171744/6/XAB; SAIC-86/1114
• Country of Publication: United States
• Language: English

Related Subjects

45 MILITARY TECHNOLOGY, WEAPONRY, AND NATIONAL DEFENSE
450300* -- Military Technology
Weaponry
& National Defense-- Nuclear Explosion Detection
58 GEOSCIENCES
580201 -- Geophysics-- Seismology & Tectonics-- (1980-1989)
AUTOMATION
DETECTION
EARTHQUAKES
FILTERS
NUCLEAR EXPLOSION DETECTION
POLARIZATION
SEISMIC DETECTION
SEISMIC EVENTS
SEISMIC WAVES