Array data processing techniques applied to long-period shear waves at Fennoscandian seismograph stations
Array data processing is applied to long-period records of S waves at a network of five Fennoscandian seismograph stations (Uppsala, Umeå, Nurmijärvi, Kongsberg, Copenhagen) with a maximum separation of 1300 km. Records of five earthquakes and one underground explosion are included in the study. The...
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Seismological Society of America
1969
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Online Access: | https://authors.library.caltech.edu/48307/ https://authors.library.caltech.edu/48307/1/1863.full.pdf https://resolver.caltech.edu/CaltechAUTHORS:20140811-130115624 |
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ftcaltechauth:oai:authors.library.caltech.edu:48307 2023-05-15T16:12:50+02:00 Array data processing techniques applied to long-period shear waves at Fennoscandian seismograph stations Whitcomb, James H. 1969-10 application/pdf https://authors.library.caltech.edu/48307/ https://authors.library.caltech.edu/48307/1/1863.full.pdf https://resolver.caltech.edu/CaltechAUTHORS:20140811-130115624 unknown Seismological Society of America https://authors.library.caltech.edu/48307/1/1863.full.pdf Whitcomb, James H. (1969) Array data processing techniques applied to long-period shear waves at Fennoscandian seismograph stations. Bulletin of the Seismological Society of America, 59 (5). pp. 1863-1887. ISSN 0037-1106. https://resolver.caltech.edu/CaltechAUTHORS:20140811-130115624 <https://resolver.caltech.edu/CaltechAUTHORS:20140811-130115624> Article PeerReviewed 1969 ftcaltechauth 2020-04-26T16:45:47Z Array data processing is applied to long-period records of S waves at a network of five Fennoscandian seismograph stations (Uppsala, Umeå, Nurmijärvi, Kongsberg, Copenhagen) with a maximum separation of 1300 km. Records of five earthquakes and one underground explosion are included in the study. The S motion is resolved into SH and SV, and after appropriate time shifts the individual traces are summed, both directly and after weighting. In general, high signal correlation exists among the different stations involved resulting in more accurate time readings, especially for records which have amplitudes that are too small to be read normally. S-wave station residuals correlate with the general crustal type under each station. In addition, the Fennoscandian shield may have a higher SH/SV velocity ratio than the adjacent tectonic area to the northwest.SV-to-P conversion at the base of the crust can seriously interfere with picking the onset of Sin normal record reading. The study demonstrates that, for epicentral distances beyond about 30°, existing networks of seismograph stations can be successfully used for array processing of long-period arrivals, especially the S arrivals. Article in Journal/Newspaper Fennoscandian Caltech Authors (California Institute of Technology) Kongsberg ENVELOPE(19.082,19.082,69.123,69.123) |
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Caltech Authors (California Institute of Technology) |
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Array data processing is applied to long-period records of S waves at a network of five Fennoscandian seismograph stations (Uppsala, Umeå, Nurmijärvi, Kongsberg, Copenhagen) with a maximum separation of 1300 km. Records of five earthquakes and one underground explosion are included in the study. The S motion is resolved into SH and SV, and after appropriate time shifts the individual traces are summed, both directly and after weighting. In general, high signal correlation exists among the different stations involved resulting in more accurate time readings, especially for records which have amplitudes that are too small to be read normally. S-wave station residuals correlate with the general crustal type under each station. In addition, the Fennoscandian shield may have a higher SH/SV velocity ratio than the adjacent tectonic area to the northwest.SV-to-P conversion at the base of the crust can seriously interfere with picking the onset of Sin normal record reading. The study demonstrates that, for epicentral distances beyond about 30°, existing networks of seismograph stations can be successfully used for array processing of long-period arrivals, especially the S arrivals. |
format |
Article in Journal/Newspaper |
author |
Whitcomb, James H. |
spellingShingle |
Whitcomb, James H. Array data processing techniques applied to long-period shear waves at Fennoscandian seismograph stations |
author_facet |
Whitcomb, James H. |
author_sort |
Whitcomb, James H. |
title |
Array data processing techniques applied to long-period shear waves at Fennoscandian seismograph stations |
title_short |
Array data processing techniques applied to long-period shear waves at Fennoscandian seismograph stations |
title_full |
Array data processing techniques applied to long-period shear waves at Fennoscandian seismograph stations |
title_fullStr |
Array data processing techniques applied to long-period shear waves at Fennoscandian seismograph stations |
title_full_unstemmed |
Array data processing techniques applied to long-period shear waves at Fennoscandian seismograph stations |
title_sort |
array data processing techniques applied to long-period shear waves at fennoscandian seismograph stations |
publisher |
Seismological Society of America |
publishDate |
1969 |
url |
https://authors.library.caltech.edu/48307/ https://authors.library.caltech.edu/48307/1/1863.full.pdf https://resolver.caltech.edu/CaltechAUTHORS:20140811-130115624 |
long_lat |
ENVELOPE(19.082,19.082,69.123,69.123) |
geographic |
Kongsberg |
geographic_facet |
Kongsberg |
genre |
Fennoscandian |
genre_facet |
Fennoscandian |
op_relation |
https://authors.library.caltech.edu/48307/1/1863.full.pdf Whitcomb, James H. (1969) Array data processing techniques applied to long-period shear waves at Fennoscandian seismograph stations. Bulletin of the Seismological Society of America, 59 (5). pp. 1863-1887. ISSN 0037-1106. https://resolver.caltech.edu/CaltechAUTHORS:20140811-130115624 <https://resolver.caltech.edu/CaltechAUTHORS:20140811-130115624> |
_version_ |
1765998439397588992 |