False positives are common in single-station template matching
Template matching has become a cornerstone technique of observational seismology. By taking known events, and scanning them against a continuous record, new events smaller than the signal-to-noise ratio can be found, substantially improving the magnitude of completeness of earthquake catalogues. Tem...
| Main Authors: | , , |
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| Format: | Journal article |
| Language: | English |
| Published: |
Seismica
2023
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| Subjects: |
| _version_ | 1797111173497225216 |
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| author | Muir, JB Fernando, B Barrett, E |
| author_facet | Muir, JB Fernando, B Barrett, E |
| author_sort | Muir, JB |
| collection | OXFORD |
| description | Template matching has become a cornerstone technique of observational seismology. By taking known events, and scanning them against a continuous record, new events smaller than the signal-to-noise ratio can be found, substantially improving the magnitude of completeness of earthquake catalogues. Template matching is normally used in an array setting, however as we move into the era of planetary seismology, we are likely to apply template matching for very small arrays or even single stations. Given the high impact of planetary seismology studies on our understanding of the structure and dynamics of non-Earth bodies, it is important to assess the reliability of template matching in the small-n setting. Towards this goal, we estimate a lower bound on the rate of false positives for single-station template matching by examining the behaviour of correlations of totally uncorrelated white noise. We find that, for typical processing regimes and match thresholds, false positives are likely quite common. We must therefore be exceptionally careful when considering the output of template matching in the small-n setting. |
| first_indexed | 2024-03-07T08:05:03Z |
| format | Journal article |
| id | oxford-uuid:61568f5a-bf53-4882-ac72-fc9532b822ac |
| institution | University of Oxford |
| language | English |
| last_indexed | 2024-03-07T08:05:03Z |
| publishDate | 2023 |
| publisher | Seismica |
| record_format | dspace |
| spelling | oxford-uuid:61568f5a-bf53-4882-ac72-fc9532b822ac2023-10-25T17:32:13ZFalse positives are common in single-station template matchingJournal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:61568f5a-bf53-4882-ac72-fc9532b822acEarth sciencesPhysical sciencesGeologyEnglishSymplectic ElementsSeismica2023Muir, JBFernando, BBarrett, ETemplate matching has become a cornerstone technique of observational seismology. By taking known events, and scanning them against a continuous record, new events smaller than the signal-to-noise ratio can be found, substantially improving the magnitude of completeness of earthquake catalogues. Template matching is normally used in an array setting, however as we move into the era of planetary seismology, we are likely to apply template matching for very small arrays or even single stations. Given the high impact of planetary seismology studies on our understanding of the structure and dynamics of non-Earth bodies, it is important to assess the reliability of template matching in the small-n setting. Towards this goal, we estimate a lower bound on the rate of false positives for single-station template matching by examining the behaviour of correlations of totally uncorrelated white noise. We find that, for typical processing regimes and match thresholds, false positives are likely quite common. We must therefore be exceptionally careful when considering the output of template matching in the small-n setting. |
| spellingShingle | Earth sciences Physical sciences Geology Muir, JB Fernando, B Barrett, E False positives are common in single-station template matching |
| title | False positives are common in single-station template matching |
| title_full | False positives are common in single-station template matching |
| title_fullStr | False positives are common in single-station template matching |
| title_full_unstemmed | False positives are common in single-station template matching |
| title_short | False positives are common in single-station template matching |
| title_sort | false positives are common in single station template matching |
| topic | Earth sciences Physical sciences Geology |
| work_keys_str_mv | AT muirjb falsepositivesarecommoninsinglestationtemplatematching AT fernandob falsepositivesarecommoninsinglestationtemplatematching AT barrette falsepositivesarecommoninsinglestationtemplatematching |