Regional characterization of mine blasts, earthquakes, mine tremors, and nuclear explosions using the intelligent seismic event identification system. Final report, 1 April 1992-1 July 1993
This report describes the results of a study of the Intelligent Seismic Event Identification System (ISEIS) which was installed at the Center for Seismic Studies and applied to regional events in the Intelligent Monitoring System (IMS) database. A subset of IMS data has been collected for known events in a database called the Ground Truth Database (GTD) and these events were processed by ISEIS. This has shown that the regional high-frequency PIS ratio discriminates between explosions and earthquakes in the Vogtland region recorded at the GERESSS array. Mine tremors in the Lubin and Upper Silesia resemble earthquakes. Lg spectral ratio was found to separate explosions and earthquakes in the Vogtland region, but the Lubin and Upper Silesia region mine tremors had large scatter. An evaluation was made of the discrimination rules in the ISEIS expert system on the events in four regions (Vogtland. Lubin, Upper Silesia, and Steigen) in the GTD. This report also describes the results of the analysis of the December 31, 1992 event which occurred near the Russian test site on Novaya Zemlya. Analysis of Pn/Sn ratios at NORESS indicated that these ratios were comparable to those measured for Kola Peninsula mine blasts, although the propagation paths were different. The ratios were only slightly greater than those observed for earthquakes in the Greenland Sea. The August 1. 1986 event recorded was re-analyzed and also found to resemble mine blasts. However, other discriminants indicate that the event was probably an earthquake.
- Research Organization:
- Ensco, Inc., Springfield, VA (United States)
- OSTI ID:
- 7071624
- Report Number(s):
- AD-A-276227/6/XAB; SAS-TR-94-12; CNN: F29601-92-C-0009; ARPA ORDER-6731.
- Country of Publication:
- United States
- Language:
- English
Similar Records
Intelligent Event Identification System. Volume 3: Software Maintenance Manual. Final report, 1 Mar 90-30 Sep 91
Design and development of the Intelligent Event Identification System. Volume 1. Final report ,1 Mar 90-30 Sep 91
Related Subjects
99 GENERAL AND MISCELLANEOUS//MATHEMATICS, COMPUTING, AND INFORMATION SCIENCE
NUCLEAR EXPLOSION DETECTION
EXPERT SYSTEMS
DETECTION
450300* - Military Technology
Weaponry
& National Defense- Nuclear Explosion Detection
990200 - Mathematics & Computers