Research Directed Toward the Use of Long and Intermediate Period Seismic Waves for the Identification of Seismic Sources
The study of anomalous events has succeeded in clarifying many of their puzzling aspects. Careful attention to the details of body wave magnitude computations has markedly reduced the number of anomalous events on the Asian continent. The remaining anomalous events display the same short period surf...
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ftdtic:ADA003675 2023-05-15T18:16:01+02:00 Research Directed Toward the Use of Long and Intermediate Period Seismic Waves for the Identification of Seismic Sources McCamy, Keith LAMONT-DOHERTY GEOLOGICAL OBSERVATORY PALISADES NY 1974-10 text/html http://www.dtic.mil/docs/citations/ADA003675 http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=ADA003675 en eng http://www.dtic.mil/docs/citations/ADA003675 Approved for public release; distribution is unlimited. DTIC AND NTIS Seismology *SEISMIC DETECTION *SEISMIC WAVES ANOMALIES ASIA CONTINENTAL SHELVES EARTH CRUST EARTHQUAKES FAULTS(GEOLOGY) LITHOSPHERE OCEANIC CRUST RAYLEIGH WAVES SEISMOMETERS SOURCES SOUTH ATLANTIC OCEAN TECTONICS Intermediate period seismometers Long period seismometers Scotia Sea Love waves Text 1974 ftdtic 2016-02-24T14:13:50Z The study of anomalous events has succeeded in clarifying many of their puzzling aspects. Careful attention to the details of body wave magnitude computations has markedly reduced the number of anomalous events on the Asian continent. The remaining anomalous events display the same short period surface wave characteristics as intraplate events and because of their focal depth and the continental crustal structure there is the strong likelihood that Love wave surface magnitudes will provide a good discriminant. The propagation of Love waves from one layered structure to another has been solved by a very efficient computational method giving excellent agreement with observations. A new technique of analyzing multi-mode surface wave dispersion has been developed which makes it possible to separate fundamental and higher mode Love waves from earth quake sources, given many observations. The technique permits mapping the horizontal variations of Love wave phase velocities. The relation of earthquake focal mechanisms to global tectonic patterns has been extended to include the heretofore perplexing plate boundaries in the South Atlantic. See also report dated Mar 1974, AD778827. Text Scotia Sea South Atlantic Ocean Defense Technical Information Center: DTIC Technical Reports database Scotia Sea |
institution |
Open Polar |
collection |
Defense Technical Information Center: DTIC Technical Reports database |
op_collection_id |
ftdtic |
language |
English |
topic |
Seismology *SEISMIC DETECTION *SEISMIC WAVES ANOMALIES ASIA CONTINENTAL SHELVES EARTH CRUST EARTHQUAKES FAULTS(GEOLOGY) LITHOSPHERE OCEANIC CRUST RAYLEIGH WAVES SEISMOMETERS SOURCES SOUTH ATLANTIC OCEAN TECTONICS Intermediate period seismometers Long period seismometers Scotia Sea Love waves |
spellingShingle |
Seismology *SEISMIC DETECTION *SEISMIC WAVES ANOMALIES ASIA CONTINENTAL SHELVES EARTH CRUST EARTHQUAKES FAULTS(GEOLOGY) LITHOSPHERE OCEANIC CRUST RAYLEIGH WAVES SEISMOMETERS SOURCES SOUTH ATLANTIC OCEAN TECTONICS Intermediate period seismometers Long period seismometers Scotia Sea Love waves McCamy, Keith Research Directed Toward the Use of Long and Intermediate Period Seismic Waves for the Identification of Seismic Sources |
topic_facet |
Seismology *SEISMIC DETECTION *SEISMIC WAVES ANOMALIES ASIA CONTINENTAL SHELVES EARTH CRUST EARTHQUAKES FAULTS(GEOLOGY) LITHOSPHERE OCEANIC CRUST RAYLEIGH WAVES SEISMOMETERS SOURCES SOUTH ATLANTIC OCEAN TECTONICS Intermediate period seismometers Long period seismometers Scotia Sea Love waves |
description |
The study of anomalous events has succeeded in clarifying many of their puzzling aspects. Careful attention to the details of body wave magnitude computations has markedly reduced the number of anomalous events on the Asian continent. The remaining anomalous events display the same short period surface wave characteristics as intraplate events and because of their focal depth and the continental crustal structure there is the strong likelihood that Love wave surface magnitudes will provide a good discriminant. The propagation of Love waves from one layered structure to another has been solved by a very efficient computational method giving excellent agreement with observations. A new technique of analyzing multi-mode surface wave dispersion has been developed which makes it possible to separate fundamental and higher mode Love waves from earth quake sources, given many observations. The technique permits mapping the horizontal variations of Love wave phase velocities. The relation of earthquake focal mechanisms to global tectonic patterns has been extended to include the heretofore perplexing plate boundaries in the South Atlantic. See also report dated Mar 1974, AD778827. |
author2 |
LAMONT-DOHERTY GEOLOGICAL OBSERVATORY PALISADES NY |
format |
Text |
author |
McCamy, Keith |
author_facet |
McCamy, Keith |
author_sort |
McCamy, Keith |
title |
Research Directed Toward the Use of Long and Intermediate Period Seismic Waves for the Identification of Seismic Sources |
title_short |
Research Directed Toward the Use of Long and Intermediate Period Seismic Waves for the Identification of Seismic Sources |
title_full |
Research Directed Toward the Use of Long and Intermediate Period Seismic Waves for the Identification of Seismic Sources |
title_fullStr |
Research Directed Toward the Use of Long and Intermediate Period Seismic Waves for the Identification of Seismic Sources |
title_full_unstemmed |
Research Directed Toward the Use of Long and Intermediate Period Seismic Waves for the Identification of Seismic Sources |
title_sort |
research directed toward the use of long and intermediate period seismic waves for the identification of seismic sources |
publishDate |
1974 |
url |
http://www.dtic.mil/docs/citations/ADA003675 http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=ADA003675 |
geographic |
Scotia Sea |
geographic_facet |
Scotia Sea |
genre |
Scotia Sea South Atlantic Ocean |
genre_facet |
Scotia Sea South Atlantic Ocean |
op_source |
DTIC AND NTIS |
op_relation |
http://www.dtic.mil/docs/citations/ADA003675 |
op_rights |
Approved for public release; distribution is unlimited. |
_version_ |
1766189418602823680 |