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. 2018 Jul 17;9:2768. doi: 10.1038/s41467-018-05180-x

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© The Author(s) 2018

Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.

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Fig. 2 — Migardsormen ice ridge and the local measurements. a Ice ridge of Midgardsormen on the northern part of the ice shelf, close to the location of the ice ridge measurements in the 1990s. The view is upstream towards the grounding line of 79 North Glacier (photo: C. Mayer, 1998). b measurements of the Midgardsormen experiment. The blue line represents the ice ridge, the red line the seismic profile. Ice velocities are displayed as black arrows and the positions of tilt meters (T) are indicated. The grounded part is indicated by gray shading