The Detection and Research of Rayleigh and Love Waves
Phase-matched filters are defined as a class of linear filters in which the Fourier phase of the filter is made equal to that of a given signal. An interative technique is described which can be used to find a phase-matched filter for a particular seismic signal. The process is then applied to digit...
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ftdtic:ADA038078 2023-05-15T16:28:00+02:00 The Detection and Research of Rayleigh and Love Waves Herrin, Eugene Goforth, Tom SOUTHERN METHODIST UNIV DALLAS TX DALLAS GEOPHYSICAL LAB 1977-02 text/html http://www.dtic.mil/docs/citations/ADA038078 http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=ADA038078 en eng http://www.dtic.mil/docs/citations/ADA038078 Approved for public release; distribution is unlimited. DTIC AND NTIS Seismology *SEISMIC WAVES DIGITAL SYSTEMS DISPERSION RELATIONS EARTHQUAKES GREENLAND SEA LINEAR FILTERING RAYLEIGH WAVES SEISMIC DETECTION SIGNAL PROCESSING SIGNAL TO NOISE RATIO TEXAS UNDERGROUND EXPLOSIONS LOVE WAVES NOVAYA ZEMLYA Text 1977 ftdtic 2016-02-24T12:22:28Z Phase-matched filters are defined as a class of linear filters in which the Fourier phase of the filter is made equal to that of a given signal. An interative technique is described which can be used to find a phase-matched filter for a particular seismic signal. The process is then applied to digital records of Rayleigh waves from a synthetic source with propagation across 55 deg. of continental path, an earthquake in the Greeland Sea Recorded in Texas, and a nuclear explosion in Novaya Zemlya recorded in New Mexico. Application of the filter allows multiple arrivals to be identified and removed and allows recovery of the complex spectrum of the primary wave train along with its apparent group velocity dispersion curve. The amplitude spectrum of the primary signal obtained by this linear spectrum of the primary signal obtained by this linear process is not contaminated by interference from multipath arrivals. The filtering process also provides significant improvement in signal-to-noise ratio; greater than factor of four for the Greenland Sea and Novaya Zemlya events. Sponsored in part by DARPA. Text Greenland Greenland Sea Novaya Zemlya Defense Technical Information Center: DTIC Technical Reports database Greenland |
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Open Polar |
collection |
Defense Technical Information Center: DTIC Technical Reports database |
op_collection_id |
ftdtic |
language |
English |
topic |
Seismology *SEISMIC WAVES DIGITAL SYSTEMS DISPERSION RELATIONS EARTHQUAKES GREENLAND SEA LINEAR FILTERING RAYLEIGH WAVES SEISMIC DETECTION SIGNAL PROCESSING SIGNAL TO NOISE RATIO TEXAS UNDERGROUND EXPLOSIONS LOVE WAVES NOVAYA ZEMLYA |
spellingShingle |
Seismology *SEISMIC WAVES DIGITAL SYSTEMS DISPERSION RELATIONS EARTHQUAKES GREENLAND SEA LINEAR FILTERING RAYLEIGH WAVES SEISMIC DETECTION SIGNAL PROCESSING SIGNAL TO NOISE RATIO TEXAS UNDERGROUND EXPLOSIONS LOVE WAVES NOVAYA ZEMLYA Herrin, Eugene Goforth, Tom The Detection and Research of Rayleigh and Love Waves |
topic_facet |
Seismology *SEISMIC WAVES DIGITAL SYSTEMS DISPERSION RELATIONS EARTHQUAKES GREENLAND SEA LINEAR FILTERING RAYLEIGH WAVES SEISMIC DETECTION SIGNAL PROCESSING SIGNAL TO NOISE RATIO TEXAS UNDERGROUND EXPLOSIONS LOVE WAVES NOVAYA ZEMLYA |
description |
Phase-matched filters are defined as a class of linear filters in which the Fourier phase of the filter is made equal to that of a given signal. An interative technique is described which can be used to find a phase-matched filter for a particular seismic signal. The process is then applied to digital records of Rayleigh waves from a synthetic source with propagation across 55 deg. of continental path, an earthquake in the Greeland Sea Recorded in Texas, and a nuclear explosion in Novaya Zemlya recorded in New Mexico. Application of the filter allows multiple arrivals to be identified and removed and allows recovery of the complex spectrum of the primary wave train along with its apparent group velocity dispersion curve. The amplitude spectrum of the primary signal obtained by this linear spectrum of the primary signal obtained by this linear process is not contaminated by interference from multipath arrivals. The filtering process also provides significant improvement in signal-to-noise ratio; greater than factor of four for the Greenland Sea and Novaya Zemlya events. Sponsored in part by DARPA. |
author2 |
SOUTHERN METHODIST UNIV DALLAS TX DALLAS GEOPHYSICAL LAB |
format |
Text |
author |
Herrin, Eugene Goforth, Tom |
author_facet |
Herrin, Eugene Goforth, Tom |
author_sort |
Herrin, Eugene |
title |
The Detection and Research of Rayleigh and Love Waves |
title_short |
The Detection and Research of Rayleigh and Love Waves |
title_full |
The Detection and Research of Rayleigh and Love Waves |
title_fullStr |
The Detection and Research of Rayleigh and Love Waves |
title_full_unstemmed |
The Detection and Research of Rayleigh and Love Waves |
title_sort |
detection and research of rayleigh and love waves |
publishDate |
1977 |
url |
http://www.dtic.mil/docs/citations/ADA038078 http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=ADA038078 |
geographic |
Greenland |
geographic_facet |
Greenland |
genre |
Greenland Greenland Sea Novaya Zemlya |
genre_facet |
Greenland Greenland Sea Novaya Zemlya |
op_source |
DTIC AND NTIS |
op_relation |
http://www.dtic.mil/docs/citations/ADA038078 |
op_rights |
Approved for public release; distribution is unlimited. |
_version_ |
1766017605408129024 |