دورية أكاديمية
Statistical redundancy of instantaneous phases: Theory and application to the seismic ambient wavefield
| العنوان: | Statistical redundancy of instantaneous phases: Theory and application to the seismic ambient wavefield |
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| المؤلفون: | Gaudot, I., Beucler, E., Mocquet, A., Schimmel, Martin, Le Feuvre, M. |
| بيانات النشر: | Oxford University Press |
| سنة النشر: | 2016 |
| المجموعة: | Digital.CSIC (Consejo Superior de Investigaciones Científicas / Spanish National Research Council) |
| مصطلحات موضوعية: | Africa, Interferometry, Statistical seismology, Theoretical seismology, Time-series analysis, Wave propagation |
| الوصف: | In order to detect possible signal redundancies in the ambient seismic wavefield, we develop a new method based on pairwise comparisons among a set of synchronous time-series. This approach is based on instantaneous phase coherence statistics. The first and second moments of the pairwise phase coherence distribution are used to characterize the phase randomness. For perfect phase randomness, the theoretical values of the mean and variance are equal to 0 and √1 - 2/π, respectively. As a consequence, any deviation from these values indicates the presence of a redundant phase in the rawcontinuous signal.Apreviously detected microseismic source in the Gulf of Guinea is used to illustrate one of the possible ways of handling phase coherence statistics. The proposed approach allows us to properly localize this persistent source, and to quantify its contribution to the overall seismic ambient wavefield. The strength of the phase coherence statistics relies in its ability to quantify the redundancy of a given phase among a set of time-series with various useful applications in seismic noise-based studies (tomography and/or source characterization). ; This works is funded by the VIBRIS project (Council of Pays de la Loire, France). EB thanks CNRS-INSU 2014-SYSTER. MS thanks MISTERIOS (CGL2013-48601-C2-1-R). ; Peer reviewed |
| نوع الوثيقة: | article in journal/newspaper |
| اللغة: | English |
| تدمد: | 0956-540X 1365-246X |
| العلاقة: | Publisher's version; http://dx.doi.org/10.1093/gji/ggv501Test; Sí; Geophysical Journal International, 204(2): 1159-1163 (2016); 10261/129903 |
| DOI: | 10.1093/gji/ggv501 |
| الإتاحة: | https://doi.org/10.1093/gji/ggv501Test |
| حقوق: | open |
| رقم الانضمام: | edsbas.893419A4 |
| قاعدة البيانات: | BASE |
Full Text Finder | تدمد: | 0956540X 1365246X |
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| DOI: | 10.1093/gji/ggv501 |