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Fig. 1 Study area and field site setting.
Study area and field site setting. (A) Three-dimensional representation of surface topography, bed topography (21), borehole locations (vertical colored lines), and GPS locations (black surface markers). (B) Regional surface velocity map showing winter flow conditions in 2010 (2, 43). Gray contours indicate bed topography in meters above sea level (m a.s.l.) (21). Left inset shows location of study region. (C) Surface map of study location showing GPS stations (black triangles, text—mean winter velocities) with flow vectors and borehole locations (colored circles: 14W, purple; 14N, blue; 14Sa, green; 14Sb, red; 15Ca, gray; 15Cb, cyan; 15S, pink; 15E, orange; 15N, dark gray). Surface strain rate tensor calculated across the GPS network: ε˙xx = a−1, ε˙yy = a−1, ε˙xy = a−1 . Nathan Maier et al. Sci Adv 2019;5:eaaw5406 Copyright © 2019 The Authors, some rights reserved; exclusive licensee American Association for the Advancement of Science. No claim to original U.S. Government Works. Distributed under a Creative Commons Attribution NonCommercial License 4.0 (CC BY-NC).
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