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Shear Velocity Model of Alaska Via Joint Inversion of Rayleigh Wave Ellipticity, Phase Velocities, and Receiver Functions Across the Alaska Transportable Array
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2020
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Source: Journal of Geophysical Research: Solid Earth, 125(2)
[PDF-27.46 MB]
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Journal Title:Journal of Geophysical Research: Solid Earth
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Description:Through the Alaska Transportable Array deployment of over 200 stations, we create a 3 ‐D tomographic model of Alaska with sensitivity ranging from the near surface (<1 km) into the uppermantle (~140 km). We perform a Markov chain Monte Carlo joint inversion of Rayleigh wave ellipticity and phase velocities, from both ambient noise and earthquake measurements, along with receiver functions to create a shear wave velocity model. We also use a follow ‐up phase velocity inversion to resolve interstation structure. By comparing our results to previous tomography, geology, and geophysical studies we are able to validate our findings and connect localized near ‐surface studies with deeper, regional models. Speci fically, we are able to resolve shallow basins, including the Copper River, Cook Inlet, Yukon Flats, Nenana, anda variety of other shallower basins. Additionally, we gain insight on the interaction between the upper
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Source:Journal of Geophysical Research: Solid Earth, 125(2)
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ISSN:2169-9313;2169-9356;
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Rights Information:Other
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