@article {liu_seismic_2024,
	title = {Seismic Azimuthal Anisotropy Beneath the Alaska Subduction Zone},
	journal = {Geophysical Research Letters},
	volume = {51},
	number = {14},
	year = {2024},
	note = {_eprint: https://onlinelibrary.wiley.com/doi/pdf/10.1029/2024GL109758},
	month = {07/2024},
	pages = {e2024GL109758},
	abstract = {We estimate depth-dependent azimuthal anisotropy and shear wave velocity structure beneath the Alaska subduction zone by the inversion of a new Rayleigh wave dispersion dataset from 8 to 85 s period. We present a layered azimuthal anisotropy model from the forearc region offshore to the subduction zone onshore. In the forearc crust, we find a trench-parallel pattern in the Semidi and Kodiak segments, while a trench-oblique pattern is observed in the Shumagins segment. These fast directions agree well with the orientations of local faults. Within the subducted slab, a dichotomous pattern of anisotropy fast axes is observed along the trench, which is consistent with the orientation of fossil anisotropy generated at the mid-ocean ridges of the Pacific-Vancouver and Kula-Pacific plates that is preserved during subduction. Beneath the subducted slab, a trench-parallel pattern is observed near the trench, which may indicate the direction of mantle flow.},
	keywords = {Alaska subduction zone, aleutian subduction zone, azimuthal anisotropy, seismic anisotropy, surface wave, surface wave tomography},
	issn = {1944-8007},
	doi = {10.1029/2024GL109758},
	url = {https://onlinelibrary.wiley.com/doi/abs/10.1029/2024GL109758},
	author = {Liu, Chuanming and Sheehan, Anne F. and Ritzwoller, Michael H.}
}
