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Title: Broadband studies of seimsmic sources at regional and teleseismic distances using advanced time-series-analysis methods. volume 1. Final report 29 Sep 89-30 Jan 91

Abstract

This report explores broadband seismic signal processing aimed at extracting information relevant to several key aspects of nuclear monitoring, yield estimation, source studies and discrimination. The term 'broadband processing' in our definition refers to techniques designed for extracting the maximum information allowed by the S/N ratio from the data, using an information-theoretical definition, not the conventional waveform inversion of the so-called broadband seismograms, and estimating error bounds for parameters estimated. Another recurrent central idea examined and exploited in this report is the frequency-domain decomposition of multi-event, multi-sensor data into source and site factors. Various ensemble-averaged coherence measures can then be used to test the effectiveness of such factorization. In Section 1.0, we examine the spectral factorability of P sub n and Lg phases recorded at NORESS and the 3C subarray of NORSAR. Section 2.0 re-examines some aspects of estimating secondary arrivals (pP, spall, etc.) in teleseismic P waves and applying corrections to Mb. Section 3.0 explores ways to perform spatio-temporal source inversion using waveform data. In the last part of the report we describe an approach for S/N ratio enhancement, using the application of site waveform-equalization, together with adaptive filtering.

Authors:
; ; ;
Publication Date:
Research Org.:
Ensco, Inc., Springfield, VA (United States)
OSTI Identifier:
5147942
Report Number(s):
AD-A-239201/7/XAB; SAS-TR-91-49-VOL-1
CNN: F19628-89-C-0030
Resource Type:
Technical Report
Country of Publication:
United States
Language:
English
Subject:
45 MILITARY TECHNOLOGY, WEAPONRY, AND NATIONAL DEFENSE; 98 NUCLEAR DISARMAMENT, SAFEGUARDS, AND PHYSICAL PROTECTION; 58 GEOSCIENCES; NUCLEAR EXPLOSION DETECTION; NUCLEAR EXPLOSIONS; SEISMIC DETECTION; YIELDS; DATA PROCESSING; DISTANCE; FORECASTING; INFORMATION RETRIEVAL; MONITORING; NORWAY; NUCLEAR WEAPONS; OPTIMIZATION; ORIGIN; SEISMIC ARRAYS; SEISMIC WAVES; SIGNALS; TESTING; TIME-SERIES ANALYSIS; DETECTION; DEVELOPED COUNTRIES; EUROPE; EXPLOSIONS; MATHEMATICS; MEASURING INSTRUMENTS; PROCESSING; SCANDINAVIA; WEAPONS; 450300* - Military Technology, Weaponry, & National Defense- Nuclear Explosion Detection; 450200 - Military Technology, Weaponry, & National Defense- Nuclear Explosions & Explosives; 350300 - Arms Control- Verification- (1987-); 580000 - Geosciences

Citation Formats

Der, J A, Hirano, M R, Ziegler, K A, and Shumway, R H. Broadband studies of seimsmic sources at regional and teleseismic distances using advanced time-series-analysis methods. volume 1. Final report 29 Sep 89-30 Jan 91. United States: N. p., 1991. Web.
Der, J A, Hirano, M R, Ziegler, K A, & Shumway, R H. Broadband studies of seimsmic sources at regional and teleseismic distances using advanced time-series-analysis methods. volume 1. Final report 29 Sep 89-30 Jan 91. United States.
Der, J A, Hirano, M R, Ziegler, K A, and Shumway, R H. Thu . "Broadband studies of seimsmic sources at regional and teleseismic distances using advanced time-series-analysis methods. volume 1. Final report 29 Sep 89-30 Jan 91". United States.
@article{osti_5147942,
title = {Broadband studies of seimsmic sources at regional and teleseismic distances using advanced time-series-analysis methods. volume 1. Final report 29 Sep 89-30 Jan 91},
author = {Der, J A and Hirano, M R and Ziegler, K A and Shumway, R H},
abstractNote = {This report explores broadband seismic signal processing aimed at extracting information relevant to several key aspects of nuclear monitoring, yield estimation, source studies and discrimination. The term 'broadband processing' in our definition refers to techniques designed for extracting the maximum information allowed by the S/N ratio from the data, using an information-theoretical definition, not the conventional waveform inversion of the so-called broadband seismograms, and estimating error bounds for parameters estimated. Another recurrent central idea examined and exploited in this report is the frequency-domain decomposition of multi-event, multi-sensor data into source and site factors. Various ensemble-averaged coherence measures can then be used to test the effectiveness of such factorization. In Section 1.0, we examine the spectral factorability of P sub n and Lg phases recorded at NORESS and the 3C subarray of NORSAR. Section 2.0 re-examines some aspects of estimating secondary arrivals (pP, spall, etc.) in teleseismic P waves and applying corrections to Mb. Section 3.0 explores ways to perform spatio-temporal source inversion using waveform data. In the last part of the report we describe an approach for S/N ratio enhancement, using the application of site waveform-equalization, together with adaptive filtering.},
doi = {},
url = {https://www.osti.gov/biblio/5147942}, journal = {},
number = ,
volume = ,
place = {United States},
year = {1991},
month = {3}
}

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