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• W2148042722 abstract "Abstract We examine seismic coda from an unusually dense deployment of over 100 short‐period and broadband seismographs in the summit region of Mount Erebus volcano on a network with an aperture of approximately 5 km. We investigate the energy‐partitioning properties of the seismic wavefield generated by thousands of small icequake sources originating on the upper volcano and use them to estimate Green's functions via coda cross correlation. Emergent coda seismograms suggest that this locale should be particularly amenable to such methods. Using a small aperture subarray, we find that modal energy partition between S and P wave energy between ∼1 and 4 Hz occurs in just a few seconds after event onset and persists for tens of seconds. Spatially averaged correlograms display clear body and surface waves that span the full aperture of the array. We test for stable bidirectional Green's function recovery and note that good symmetry can be achieved at this site even with a geographically skewed distribution of sources. We estimate scattering and absorption mean free path lengths and find a power law decrease in mean free path between 1.5 and 3.3 Hz that suggests a quasi‐Rayleigh or Rayleigh‐Gans scattering situation. Finally, we demonstrate the existence of coherent backscattering (weak localization) for this coda wavefield. The remarkable properties of scattered seismic wavefields in the vicinity of active volcanoes suggests that the abundant small icequake sources may be used for illumination where temporal monitoring of such dynamic structures is concerned." @default.
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• W2148042722 date "2015-02-01" @default.
• W2148042722 modified "2023-10-14" @default.
• W2148042722 title "Multiple scattering from icequakes at Erebus volcano, Antarctica: Implications for imaging at glaciated volcanoes" @default.
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• W2148042722 doi "https://doi.org/10.1002/2014jb011278" @default.
• W2148042722 hasPublicationYear "2015" @default.
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