Regional Source-Type Discrimination Using Nonlinear Alignment Algorithms
The discrimination problem in seismology aims to accurately classify different underground source types based on local, regional, and/or teleseismic observations of ground motion. Typical discriminant approaches are rooted in fundamental, physics-based differences in radiation pattern or wave excita...
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| Format: | Article |
| Language: | English |
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Seismological Society of America
2025-02-01
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| Series: | The Seismic Record |
| Online Access: | https://doi.org/10.1785/0320240038 |
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| _version_ | 1850027723426103296 |
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| author | Marlon D. Ramos Rigobert Tibi Christopher J. Young Erica L. Emry |
| author_facet | Marlon D. Ramos Rigobert Tibi Christopher J. Young Erica L. Emry |
| author_sort | Marlon D. Ramos |
| collection | DOAJ |
| description | The discrimination problem in seismology aims to accurately classify different underground source types based on local, regional, and/or teleseismic observations of ground motion. Typical discriminant approaches are rooted in fundamental, physics-based differences in radiation pattern or wave excitation, which can be frequency-dependent and may not make use of the full waveform. In this article, we explore whether phase and amplitude distances derived from dynamic time warping (DTW) and elastic shape analysis (ESA) can inform event discrimination. We demonstrate the ability to distinguish underground point sources using synthetic waveforms calculated for a 1D Earth model and various source mechanisms. We then apply the method to recorded data from events in the Korean Peninsula, which includes declared nuclear explosions, a collapse event, and naturally occurring earthquakes. Phase and amplitude distances derived from DTW and ESA are then used to classify the event types via dendrogram and k-nearest-neighbor clustering analyses. Using information from the full waveform, we show how different underground sources can be distinguished at regional distances. We highlight the potential of these nonlinear alignment algorithms for discrimination and comment on ways we can extend the framework presented here. |
| format | Article |
| id | doaj-art-484d707e8d014568a2c9778bbde4c439 |
| institution | DOAJ |
| issn | 2694-4006 |
| language | English |
| publishDate | 2025-02-01 |
| publisher | Seismological Society of America |
| record_format | Article |
| series | The Seismic Record |
| spelling | doaj-art-484d707e8d014568a2c9778bbde4c4392025-08-20T03:00:04ZengSeismological Society of AmericaThe Seismic Record2694-40062025-02-01519710610.1785/0320240038tsr2024038Regional Source-Type Discrimination Using Nonlinear Alignment AlgorithmsMarlon D. Ramos0https://orcid.org/0000-0003-4449-8624Rigobert Tibi1https://orcid.org/0000-0002-4784-3940Christopher J. Young2https://orcid.org/0000-0001-5027-3216Erica L. Emry3https://orcid.org/0000-0001-5515-1568Sandia National Laboratories, Albuquerque, New Mexico, U.S.A.Sandia National Laboratories, Albuquerque, New Mexico, U.S.A.Sandia National Laboratories, Albuquerque, New Mexico, U.S.A.Sandia National Laboratories, Albuquerque, New Mexico, U.S.A.The discrimination problem in seismology aims to accurately classify different underground source types based on local, regional, and/or teleseismic observations of ground motion. Typical discriminant approaches are rooted in fundamental, physics-based differences in radiation pattern or wave excitation, which can be frequency-dependent and may not make use of the full waveform. In this article, we explore whether phase and amplitude distances derived from dynamic time warping (DTW) and elastic shape analysis (ESA) can inform event discrimination. We demonstrate the ability to distinguish underground point sources using synthetic waveforms calculated for a 1D Earth model and various source mechanisms. We then apply the method to recorded data from events in the Korean Peninsula, which includes declared nuclear explosions, a collapse event, and naturally occurring earthquakes. Phase and amplitude distances derived from DTW and ESA are then used to classify the event types via dendrogram and k-nearest-neighbor clustering analyses. Using information from the full waveform, we show how different underground sources can be distinguished at regional distances. We highlight the potential of these nonlinear alignment algorithms for discrimination and comment on ways we can extend the framework presented here.https://doi.org/10.1785/0320240038 |
| spellingShingle | Marlon D. Ramos Rigobert Tibi Christopher J. Young Erica L. Emry Regional Source-Type Discrimination Using Nonlinear Alignment Algorithms The Seismic Record |
| title | Regional Source-Type Discrimination Using Nonlinear Alignment Algorithms |
| title_full | Regional Source-Type Discrimination Using Nonlinear Alignment Algorithms |
| title_fullStr | Regional Source-Type Discrimination Using Nonlinear Alignment Algorithms |
| title_full_unstemmed | Regional Source-Type Discrimination Using Nonlinear Alignment Algorithms |
| title_short | Regional Source-Type Discrimination Using Nonlinear Alignment Algorithms |
| title_sort | regional source type discrimination using nonlinear alignment algorithms |
| url | https://doi.org/10.1785/0320240038 |
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