Characterization of broadband regional distance seismograms: Use of global, open data to study regions of interest. Final technical report, 15 July 1992-15 January 1995

Technical Report · Thu Jun 01 04:00:00 EDT 1995

OSTI ID:166915

Wallace, T C; Beck, S L

This research undertook scientific problem inherent in the monitoring of a comprehensive nuclear test ban treaty; establishing confidence that the seismograms from small and moderate-sized events are understood, thus, identifiable. This requires an understanding of broadband regional distance seismic phases from both explosions and earthquakes, the excitation of the various phases, and their dependence on source. Data from open broadband stations across the Andean Cordillera were used in research to evaluate the utility of the spectral characteristics of regional distance seismo-grams of phase ratio pairs (Pg/Lg; Pn/Lg). The entire regional waveforms for seismic events traversing the Andes were modeled providing detail of crustal thickness, the average crustal velocity, and propagation efficiency. Further, this report details research to treat a single regional distance station as a seismic observatory and to establish a relative location procedure in which to locate smaller magnitude events relative to an established epicentral coordinate. Finally, the results are reported of a temporary broadband deployment used to record the DOE hosted Non-Proliferation Experiment; exploration of how geologic environment changes affects discriminants.

• Research Organization: Arizona Univ., Tucson, AZ (United States). Dept. of Geosciences
• OSTI ID: 166915
• Report Number(s): AD-A--297909/4/XAB; CNN: Contract F49620-92-J-0416
• Country of Publication: United States
• Language: English

Related Subjects

35 ARMS CONTROL
45 MILITARY TECHNOLOGY, WEAPONRY, AND NATIONAL DEFENSE
ARMS CONTROL
EARTHQUAKES
NUCLEAR EXPLOSION DETECTION
NUCLEAR EXPLOSIONS
PROGRESS REPORT
REGIONAL ANALYSIS
SEISMIC EVENTS