Statistical Discrimination. Higher Mode Detection Studies
The report presents results of applying a maximum entropy power spectrum analysis technique to detect higher order mode surface waves. The algorithm used partitioned each seismogram into time gates representing average group velocities, and spectral analysis was used to determine the periods of the...
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ftdtic:AD0880494 2023-05-15T18:48:58+02:00 Statistical Discrimination. Higher Mode Detection Studies Swindell, William H TEXAS INSTRUMENTS INC DALLAS SERVICES GROUP 1970-11-30 text/html http://www.dtic.mil/docs/citations/AD0880494 http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=AD0880494 en eng http://www.dtic.mil/docs/citations/AD0880494 Approved for public release; distribution is unlimited. DTIC AND NTIS Seismology Seismic Detection and Detectors *SEISMOLOGICAL STATIONS *UNDERGROUND EXPLOSIONS ALASKA ALEUTIAN ISLANDS CALIFORNIA CHINA DETECTION EARTHQUAKES ELECTROMAGNETIC WAVE FILTERS EUROPE JAPAN MONTANA NOISE NUCLEAR EXPLOSIONS POWER SPECTRA RAYLEIGH WAVES SEISMOMETERS SIGNAL TO NOISE RATIO SPECTRUM SIGNATURES TIME SERIES ANALYSIS *LARGE APERTURE SEISMIC ARRAY *LASA(LARGE APERTURE SEISMIC ARRAY) LONG PERIOD SEISMOMETERS SPECTRUM ANALYSIS VELA UNIFORM Text 1970 ftdtic 2016-02-24T13:19:03Z The report presents results of applying a maximum entropy power spectrum analysis technique to detect higher order mode surface waves. The algorithm used partitioned each seismogram into time gates representing average group velocities, and spectral analysis was used to determine the periods of the data in the gates. The technique was tested successfully on artificial seismograms containing the Rayleigh and three higher modes of surface waves, with and without additive noise. Maximum entropy power spectrum analysis techniques were applied to an ensemble of 29 long-period seismograms obtained from LASA beams. The long-period seismograms were of both continental and continental-oceanic paths. While several instances of possible higher mode waves were revealed by the analysis, no consistency was found in the occurrence of these modes. Major conclusions were that ME spectrum analysis provides finer details in seismogram spectra than are otherwise available and that it provides an effective method for computing group-velocity frequency curves. See also Report no. 2, AD0871116. Text Alaska Aleutian Islands 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 |
op_collection_id |
ftdtic |
language |
English |
topic |
Seismology Seismic Detection and Detectors *SEISMOLOGICAL STATIONS *UNDERGROUND EXPLOSIONS ALASKA ALEUTIAN ISLANDS CALIFORNIA CHINA DETECTION EARTHQUAKES ELECTROMAGNETIC WAVE FILTERS EUROPE JAPAN MONTANA NOISE NUCLEAR EXPLOSIONS POWER SPECTRA RAYLEIGH WAVES SEISMOMETERS SIGNAL TO NOISE RATIO SPECTRUM SIGNATURES TIME SERIES ANALYSIS *LARGE APERTURE SEISMIC ARRAY *LASA(LARGE APERTURE SEISMIC ARRAY) LONG PERIOD SEISMOMETERS SPECTRUM ANALYSIS VELA UNIFORM |
spellingShingle |
Seismology Seismic Detection and Detectors *SEISMOLOGICAL STATIONS *UNDERGROUND EXPLOSIONS ALASKA ALEUTIAN ISLANDS CALIFORNIA CHINA DETECTION EARTHQUAKES ELECTROMAGNETIC WAVE FILTERS EUROPE JAPAN MONTANA NOISE NUCLEAR EXPLOSIONS POWER SPECTRA RAYLEIGH WAVES SEISMOMETERS SIGNAL TO NOISE RATIO SPECTRUM SIGNATURES TIME SERIES ANALYSIS *LARGE APERTURE SEISMIC ARRAY *LASA(LARGE APERTURE SEISMIC ARRAY) LONG PERIOD SEISMOMETERS SPECTRUM ANALYSIS VELA UNIFORM Swindell, William H Statistical Discrimination. Higher Mode Detection Studies |
topic_facet |
Seismology Seismic Detection and Detectors *SEISMOLOGICAL STATIONS *UNDERGROUND EXPLOSIONS ALASKA ALEUTIAN ISLANDS CALIFORNIA CHINA DETECTION EARTHQUAKES ELECTROMAGNETIC WAVE FILTERS EUROPE JAPAN MONTANA NOISE NUCLEAR EXPLOSIONS POWER SPECTRA RAYLEIGH WAVES SEISMOMETERS SIGNAL TO NOISE RATIO SPECTRUM SIGNATURES TIME SERIES ANALYSIS *LARGE APERTURE SEISMIC ARRAY *LASA(LARGE APERTURE SEISMIC ARRAY) LONG PERIOD SEISMOMETERS SPECTRUM ANALYSIS VELA UNIFORM |
description |
The report presents results of applying a maximum entropy power spectrum analysis technique to detect higher order mode surface waves. The algorithm used partitioned each seismogram into time gates representing average group velocities, and spectral analysis was used to determine the periods of the data in the gates. The technique was tested successfully on artificial seismograms containing the Rayleigh and three higher modes of surface waves, with and without additive noise. Maximum entropy power spectrum analysis techniques were applied to an ensemble of 29 long-period seismograms obtained from LASA beams. The long-period seismograms were of both continental and continental-oceanic paths. While several instances of possible higher mode waves were revealed by the analysis, no consistency was found in the occurrence of these modes. Major conclusions were that ME spectrum analysis provides finer details in seismogram spectra than are otherwise available and that it provides an effective method for computing group-velocity frequency curves. See also Report no. 2, AD0871116. |
author2 |
TEXAS INSTRUMENTS INC DALLAS SERVICES GROUP |
format |
Text |
author |
Swindell, William H |
author_facet |
Swindell, William H |
author_sort |
Swindell, William H |
title |
Statistical Discrimination. Higher Mode Detection Studies |
title_short |
Statistical Discrimination. Higher Mode Detection Studies |
title_full |
Statistical Discrimination. Higher Mode Detection Studies |
title_fullStr |
Statistical Discrimination. Higher Mode Detection Studies |
title_full_unstemmed |
Statistical Discrimination. Higher Mode Detection Studies |
title_sort |
statistical discrimination. higher mode detection studies |
publishDate |
1970 |
url |
http://www.dtic.mil/docs/citations/AD0880494 http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=AD0880494 |
genre |
Alaska Aleutian Islands |
genre_facet |
Alaska Aleutian Islands |
op_source |
DTIC AND NTIS |
op_relation |
http://www.dtic.mil/docs/citations/AD0880494 |
op_rights |
Approved for public release; distribution is unlimited. |
_version_ |
1766242364904439808 |