دورية أكاديمية
Antipodal focusing of seismic waves observed with the USArray
| العنوان: | Antipodal focusing of seismic waves observed with the USArray |
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| المؤلفون: | Retailleau, L., Shapiro, N., M, Guilbert, J., Campillo, M., Roux, P. |
| المساهمون: | Institut de recherches sur la catalyse et l'environnement de Lyon (IRCELYON), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut de Chimie - CNRS Chimie (INC-CNRS)-Centre National de la Recherche Scientifique (CNRS), Institut de Physique du Globe de Paris (IPGP), Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris Diderot - Paris 7 (UPD7)-Université de La Réunion (UR)-Institut de Physique du Globe de Paris (IPG Paris)-Centre National de la Recherche Scientifique (CNRS), DAM Île-de-France (DAM/DIF), Direction des Applications Militaires (DAM), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA), Institut des Sciences de la Terre (ISTerre), Université Joseph Fourier - Grenoble 1 (UJF)-Institut Français des Sciences et Technologies des Transports, de l'Aménagement et des Réseaux (IFSTTAR)-Institut national des sciences de l'Univers (INSU - CNRS)-Institut de recherche pour le développement IRD : UR219-PRES Université de Grenoble-Université Savoie Mont Blanc (USMB Université de Savoie Université de Chambéry )-Centre National de la Recherche Scientifique (CNRS), This work was supported by the Commissariatl’Energie Atomique (CEA, France) and by the EuropeanResearch Council under the contract FP7 ERC Advanced grant227507 (WHISPER), the EarthScope USArray facility, operated by Incorporated Research Institutions for Seismology (IRIS) |
| المصدر: | ISSN: 0956-540X. |
| بيانات النشر: | HAL CCSD Oxford University Press (OUP) |
| سنة النشر: | 2014 |
| المجموعة: | HAL Lyon 1 (University Claude Bernard Lyon 1) |
| مصطلحات موضوعية: | Earthquake source observations, Body waves, Wave propagation, [SDU]Sciences of the Universe [physics], [SDU.STU]Sciences of the Universe [physics]/Earth Sciences |
| الوصف: | International audience ; S U M M A R Y We present an analysis of the M w = 5.3 earthquake that occurred in the Southeast Indian Ridge on 2010 February 11 using USArray data. The epicentre of this event is antipodal to the USArray, providing us with an opportunity to observe in details the antipodal focusing of seismic waves in space and time. We compare the observed signals with synthetic seismograms computed for a spherically symmetric earth model (PREM). A beamforming analysis is performed over the different seismic phases detected at antipodal distances. Direct spatial snapshots of the signals and the beamforming results show that the focusing is well predicted for the first P-wave phases such as PKP or PP. However, converted phases (SKSP, PPS) show a deviation of the energy focusing to the south, likely caused by the Earth's heterogeneity. Focusing of multiple S-wave phases strongly deteriorates and is barely observable. |
| نوع الوثيقة: | article in journal/newspaper |
| اللغة: | English |
| العلاقة: | insu-02277353; https://insu.hal.science/insu-02277353Test; https://insu.hal.science/insu-02277353/documentTest; https://insu.hal.science/insu-02277353/file/ggu309.pdfTest |
| DOI: | 10.1093/gji/ggu309 |
| الإتاحة: | https://doi.org/10.1093/gji/ggu309Test https://insu.hal.science/insu-02277353Test https://insu.hal.science/insu-02277353/documentTest https://insu.hal.science/insu-02277353/file/ggu309.pdfTest |
| حقوق: | info:eu-repo/semantics/OpenAccess |
| رقم الانضمام: | edsbas.CD742FF3 |
| قاعدة البيانات: | BASE |
| DOI: | 10.1093/gji/ggu309 |
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