Maximum-Likelihood Multichannel Deconvolution of P Waves at Seismic Arrays
The results of maximum-likelihood multichannel deconvolution applied to array recordings and three component station networks for teleseismic P waves, are presented and interpreted in terms of possible surface reflections and other arrivals from explosions conducted at many of the world's major...
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ftdtic:ADA194990 2023-05-15T17:47:15+02:00 Maximum-Likelihood Multichannel Deconvolution of P Waves at Seismic Arrays Der, Z A Lees, A C Chan, W W Shumway, R H McLaughlin, K L TELEDYNE GEOTECH ALEXANDRIA VA ALEXANDRIA LABS 1987-11 text/html http://www.dtic.mil/docs/citations/ADA194990 http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=ADA194990 en eng http://www.dtic.mil/docs/citations/ADA194990 Approved for public release; distribution is unlimited. DTIC AND NTIS Seismic Detection and Detectors Nuclear Weapons *PRIMARY WAVES(SEISMIC WAVES) *SEISMIC DATA ARRIVAL AZIMUTH CONVOLUTION CYCLES ESTIMATES FUNCTIONS LONG RANGE(DISTANCE) MAXIMUM LIKELIHOOD ESTIMATION MOMENTS MULTICHANNEL NETWORKS NEVADA NUCLEAR EXPLOSION TESTING NUCLEAR EXPLOSIONS RECEIVERS RECORDING SYSTEMS REGIONS SAHARAN AFRICA SEISMIC ARRAYS SEISMIC REFLECTION SEISMOMETERS SIGNAL PROCESSING SITES SOURCES SPECTRA STATIONS SURFACES TEST FACILITIES TIME TOPOGRAPHY USSR VARIATIONS YIELD(NUCLEAR EXPLOSIONS) DECONVOLUTION NEVADA TEST SITE NOVAYA ZEMLYA (USSR) EAST KAZAKH (USSR) SEISMIC MOMENT PE61102F Text 1987 ftdtic 2016-02-24T12:53:41Z The results of maximum-likelihood multichannel deconvolution applied to array recordings and three component station networks for teleseismic P waves, are presented and interpreted in terms of possible surface reflections and other arrivals from explosions conducted at many of the world's major nuclear test sites. The deconvolution method utilizes the well known fact that P wave spectra can be decomposed into source and receiver spectral factors. The source functions obtained in the deconvolution process provide a better picture of the nature of explosion source time functions, and in particular of the presence or lack of secondary arrivals following the P wave such as pP or spall. The presence of such secondary arrivals and their effects on the first cycle of the P wave are very important in yield estimation. Significant variations in the deconvolved source time function between test sites may be associated with topography and testing practices. All of the source functions show complexity in addition to the initial P arrival and pP arrival, if present. There is also a great deal of variation between different source time functions for events at the same test site. Often, but by no means always, events occurring near each other look particularly similar. The site functions are also complex in most cases and azimuthal variations are significant in both source and receiver regions. Site and source effects contribute about equally to the energy observed in the P codes of the events analyzed. Deconvolved source time functions should be especially useful for improving estimates in the m sub b bias between test sites and to improve yield estimates since site as well at t*, instrument, and any known source spectra are removed. Text Novaya Zemlya Defense Technical Information Center: DTIC Technical Reports database |
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Open Polar |
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Defense Technical Information Center: DTIC Technical Reports database |
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ftdtic |
language |
English |
topic |
Seismic Detection and Detectors Nuclear Weapons *PRIMARY WAVES(SEISMIC WAVES) *SEISMIC DATA ARRIVAL AZIMUTH CONVOLUTION CYCLES ESTIMATES FUNCTIONS LONG RANGE(DISTANCE) MAXIMUM LIKELIHOOD ESTIMATION MOMENTS MULTICHANNEL NETWORKS NEVADA NUCLEAR EXPLOSION TESTING NUCLEAR EXPLOSIONS RECEIVERS RECORDING SYSTEMS REGIONS SAHARAN AFRICA SEISMIC ARRAYS SEISMIC REFLECTION SEISMOMETERS SIGNAL PROCESSING SITES SOURCES SPECTRA STATIONS SURFACES TEST FACILITIES TIME TOPOGRAPHY USSR VARIATIONS YIELD(NUCLEAR EXPLOSIONS) DECONVOLUTION NEVADA TEST SITE NOVAYA ZEMLYA (USSR) EAST KAZAKH (USSR) SEISMIC MOMENT PE61102F |
spellingShingle |
Seismic Detection and Detectors Nuclear Weapons *PRIMARY WAVES(SEISMIC WAVES) *SEISMIC DATA ARRIVAL AZIMUTH CONVOLUTION CYCLES ESTIMATES FUNCTIONS LONG RANGE(DISTANCE) MAXIMUM LIKELIHOOD ESTIMATION MOMENTS MULTICHANNEL NETWORKS NEVADA NUCLEAR EXPLOSION TESTING NUCLEAR EXPLOSIONS RECEIVERS RECORDING SYSTEMS REGIONS SAHARAN AFRICA SEISMIC ARRAYS SEISMIC REFLECTION SEISMOMETERS SIGNAL PROCESSING SITES SOURCES SPECTRA STATIONS SURFACES TEST FACILITIES TIME TOPOGRAPHY USSR VARIATIONS YIELD(NUCLEAR EXPLOSIONS) DECONVOLUTION NEVADA TEST SITE NOVAYA ZEMLYA (USSR) EAST KAZAKH (USSR) SEISMIC MOMENT PE61102F Der, Z A Lees, A C Chan, W W Shumway, R H McLaughlin, K L Maximum-Likelihood Multichannel Deconvolution of P Waves at Seismic Arrays |
topic_facet |
Seismic Detection and Detectors Nuclear Weapons *PRIMARY WAVES(SEISMIC WAVES) *SEISMIC DATA ARRIVAL AZIMUTH CONVOLUTION CYCLES ESTIMATES FUNCTIONS LONG RANGE(DISTANCE) MAXIMUM LIKELIHOOD ESTIMATION MOMENTS MULTICHANNEL NETWORKS NEVADA NUCLEAR EXPLOSION TESTING NUCLEAR EXPLOSIONS RECEIVERS RECORDING SYSTEMS REGIONS SAHARAN AFRICA SEISMIC ARRAYS SEISMIC REFLECTION SEISMOMETERS SIGNAL PROCESSING SITES SOURCES SPECTRA STATIONS SURFACES TEST FACILITIES TIME TOPOGRAPHY USSR VARIATIONS YIELD(NUCLEAR EXPLOSIONS) DECONVOLUTION NEVADA TEST SITE NOVAYA ZEMLYA (USSR) EAST KAZAKH (USSR) SEISMIC MOMENT PE61102F |
description |
The results of maximum-likelihood multichannel deconvolution applied to array recordings and three component station networks for teleseismic P waves, are presented and interpreted in terms of possible surface reflections and other arrivals from explosions conducted at many of the world's major nuclear test sites. The deconvolution method utilizes the well known fact that P wave spectra can be decomposed into source and receiver spectral factors. The source functions obtained in the deconvolution process provide a better picture of the nature of explosion source time functions, and in particular of the presence or lack of secondary arrivals following the P wave such as pP or spall. The presence of such secondary arrivals and their effects on the first cycle of the P wave are very important in yield estimation. Significant variations in the deconvolved source time function between test sites may be associated with topography and testing practices. All of the source functions show complexity in addition to the initial P arrival and pP arrival, if present. There is also a great deal of variation between different source time functions for events at the same test site. Often, but by no means always, events occurring near each other look particularly similar. The site functions are also complex in most cases and azimuthal variations are significant in both source and receiver regions. Site and source effects contribute about equally to the energy observed in the P codes of the events analyzed. Deconvolved source time functions should be especially useful for improving estimates in the m sub b bias between test sites and to improve yield estimates since site as well at t*, instrument, and any known source spectra are removed. |
author2 |
TELEDYNE GEOTECH ALEXANDRIA VA ALEXANDRIA LABS |
format |
Text |
author |
Der, Z A Lees, A C Chan, W W Shumway, R H McLaughlin, K L |
author_facet |
Der, Z A Lees, A C Chan, W W Shumway, R H McLaughlin, K L |
author_sort |
Der, Z A |
title |
Maximum-Likelihood Multichannel Deconvolution of P Waves at Seismic Arrays |
title_short |
Maximum-Likelihood Multichannel Deconvolution of P Waves at Seismic Arrays |
title_full |
Maximum-Likelihood Multichannel Deconvolution of P Waves at Seismic Arrays |
title_fullStr |
Maximum-Likelihood Multichannel Deconvolution of P Waves at Seismic Arrays |
title_full_unstemmed |
Maximum-Likelihood Multichannel Deconvolution of P Waves at Seismic Arrays |
title_sort |
maximum-likelihood multichannel deconvolution of p waves at seismic arrays |
publishDate |
1987 |
url |
http://www.dtic.mil/docs/citations/ADA194990 http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=ADA194990 |
genre |
Novaya Zemlya |
genre_facet |
Novaya Zemlya |
op_source |
DTIC AND NTIS |
op_relation |
http://www.dtic.mil/docs/citations/ADA194990 |
op_rights |
Approved for public release; distribution is unlimited. |
_version_ |
1766151616839286784 |