The nature of particle motion in regional seismograms and its utilization for phase identification
The particle motion of regional arrivals is frequently treated in automatic phase-recognition schemes as that appropriate to simple P or S waves incident on an elastic, laterally homogeneous half-space. This model implies that the motion in ‘ P -type’ phases can be described in terms of a single, ge...
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1993
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fthighwire:oai:open-archive.highwire.org:gji:115/3/1012 2023-05-15T17:05:03+02:00 The nature of particle motion in regional seismograms and its utilization for phase identification Der, Zoltan A. Baumgardt, Douglas R. Shumway, Robert H. 1993-12-01 00:00:00.0 text/html http://gji.oxfordjournals.org/cgi/content/short/115/3/1012 https://doi.org/10.1111/j.1365-246X.1993.tb01506.x en eng Oxford University Press http://gji.oxfordjournals.org/cgi/content/short/115/3/1012 http://dx.doi.org/10.1111/j.1365-246X.1993.tb01506.x Copyright (C) 1993, Oxford University Press Articles TEXT 1993 fthighwire https://doi.org/10.1111/j.1365-246X.1993.tb01506.x 2016-11-16T17:05:47Z The particle motion of regional arrivals is frequently treated in automatic phase-recognition schemes as that appropriate to simple P or S waves incident on an elastic, laterally homogeneous half-space. This model implies that the motion in ‘ P -type’ phases can be described in terms of a single, generalized signal process and ‘ S -type’ phases in terms of two independent processes ( SV and SH ) and thus, all regional arrivals could be fully characterized by three components of motion. In this paper, we present anlyses of the particle-motion patterns of various regional arrivals recorded at the ARCESS array from closely spaced events in the Kola Peninsula. We have found that only Pn -particle motion, described in terms of two independent signal processes, can be reliably characterized by three-component recordings. On the other hand, the various regional arrivals following Pn , such as Pg and Sn and Lg , can only be poorly characterized on the basis of three-component recordings alone. The reason is that these arrivals must be described in terms of more than two independent generalized signal processes, at least three for Pg and Sn , and possibly up to five for Lg . Recognition of these phases will thus require the use of more sensors than signal processes in the observing sensor configuration, such as three-component sensors combined with a small tripartite array. We have investigated the feasibility of adaptive, automatic recognition of regional arrivials by a wavefield extrapolation scheme utilizing such a mini-array. The process, which appear to be promising, adaptively learns the particle-motion patterns of individual arrivals, including complex site-response functions, from examples of closely located regional events. Text kola peninsula HighWire Press (Stanford University) Kola Peninsula Geophysical Journal International 115 3 1012 1024 |
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HighWire Press (Stanford University) |
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English |
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Articles |
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Articles Der, Zoltan A. Baumgardt, Douglas R. Shumway, Robert H. The nature of particle motion in regional seismograms and its utilization for phase identification |
topic_facet |
Articles |
description |
The particle motion of regional arrivals is frequently treated in automatic phase-recognition schemes as that appropriate to simple P or S waves incident on an elastic, laterally homogeneous half-space. This model implies that the motion in ‘ P -type’ phases can be described in terms of a single, generalized signal process and ‘ S -type’ phases in terms of two independent processes ( SV and SH ) and thus, all regional arrivals could be fully characterized by three components of motion. In this paper, we present anlyses of the particle-motion patterns of various regional arrivals recorded at the ARCESS array from closely spaced events in the Kola Peninsula. We have found that only Pn -particle motion, described in terms of two independent signal processes, can be reliably characterized by three-component recordings. On the other hand, the various regional arrivals following Pn , such as Pg and Sn and Lg , can only be poorly characterized on the basis of three-component recordings alone. The reason is that these arrivals must be described in terms of more than two independent generalized signal processes, at least three for Pg and Sn , and possibly up to five for Lg . Recognition of these phases will thus require the use of more sensors than signal processes in the observing sensor configuration, such as three-component sensors combined with a small tripartite array. We have investigated the feasibility of adaptive, automatic recognition of regional arrivials by a wavefield extrapolation scheme utilizing such a mini-array. The process, which appear to be promising, adaptively learns the particle-motion patterns of individual arrivals, including complex site-response functions, from examples of closely located regional events. |
format |
Text |
author |
Der, Zoltan A. Baumgardt, Douglas R. Shumway, Robert H. |
author_facet |
Der, Zoltan A. Baumgardt, Douglas R. Shumway, Robert H. |
author_sort |
Der, Zoltan A. |
title |
The nature of particle motion in regional seismograms and its utilization for phase identification |
title_short |
The nature of particle motion in regional seismograms and its utilization for phase identification |
title_full |
The nature of particle motion in regional seismograms and its utilization for phase identification |
title_fullStr |
The nature of particle motion in regional seismograms and its utilization for phase identification |
title_full_unstemmed |
The nature of particle motion in regional seismograms and its utilization for phase identification |
title_sort |
nature of particle motion in regional seismograms and its utilization for phase identification |
publisher |
Oxford University Press |
publishDate |
1993 |
url |
http://gji.oxfordjournals.org/cgi/content/short/115/3/1012 https://doi.org/10.1111/j.1365-246X.1993.tb01506.x |
geographic |
Kola Peninsula |
geographic_facet |
Kola Peninsula |
genre |
kola peninsula |
genre_facet |
kola peninsula |
op_relation |
http://gji.oxfordjournals.org/cgi/content/short/115/3/1012 http://dx.doi.org/10.1111/j.1365-246X.1993.tb01506.x |
op_rights |
Copyright (C) 1993, Oxford University Press |
op_doi |
https://doi.org/10.1111/j.1365-246X.1993.tb01506.x |
container_title |
Geophysical Journal International |
container_volume |
115 |
container_issue |
3 |
container_start_page |
1012 |
op_container_end_page |
1024 |
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1766059420899344384 |