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- W1994329571 abstract "Backprojection has become a powerful tool for imaging the rupture process of global earthquakes. We demonstrate the ability of backprojection to illuminate and track volcanic sources as well. We apply the method to the seismic network from Okmok Volcano, Alaska, at the time of an escalation in tremor during the 2008 eruption. Although we are able to focus the wavefield close to the location of the active cone, the network array response lacks sufficient resolution to reveal kilometer-scale changes in tremor location. By deconvolving the response in successive backprojection images, we enhance resolution and find that the tremor source moved toward an intracaldera lake prior to its escalation. The increased tremor therefore resulted from magma-water interaction, in agreement with the overall phreatomagmatic character of the eruption. Imaging of eruption tremor shows that time reversal methods, such as backprojection, can provide new insights into the temporal evolution of volcanic sources." @default.
- W1994329571 created "2016-06-24" @default.
- W1994329571 creator A5083222308 @default.
- W1994329571 date "2014-03-19" @default.
- W1994329571 modified "2023-10-18" @default.
- W1994329571 title "Backprojection of volcanic tremor" @default.
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- W1994329571 doi "https://doi.org/10.1002/2013gl058836" @default.
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