Document Type
Article
Publication Title
Geophysical Research Letters
Rights and Access Note
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Publication Date
12-30-2008
Issue Number
24
Publication Number
L24503
Volume Number
35
Abstract/ Summary
Geodetic observations show several large, sudden increases in flow speed at Helheim Glacier, one of Greenland's largest outlet glaciers, during summer, 2007. These step-like accelerations, detected along the length of the glacier, coincide with teleseismically detected glacial earthquakes and major iceberg calving events. No coseismic offset in the position of the glacier surface is observed; instead, modest tsunamis associated with the glacial earthquakes implicate glacier calving in the seismogenic process. Our results link changes in glacier velocity directly to calving-front behavior at Greenland's largest outlet glaciers, on timescales as short as minutes to hours, and clarify the mechanism by which glacial earthquakes occur. Citation: Nettles, M., et al. (2008), Step-wise changes in glacier flow speed coincide with calving and glacial earthquakes at Helheim Glacier, Greenland, Geophys. Res. Lett., 35, L24503, doi: 10.1029/2008GL036127.
Repository Citation
Nettles, M.; Larsen, T. B.; Elósegui, P.; Hamilton, Gordon S.; Stearns, Leigh A.; Ahlstrom, A. P.; Davis, J. L.; Andersen, M. L.; de Juan, J.; Khan, S. A.; Stensing, L.; Ekstrom, G.; and Forsberg, R., "Step-Wise Changes in Glacier Flow Speed Coincide With Calving and Glacial Earthquakes at Helheim Glacier, Greenland" (2008). Earth Science Faculty Scholarship. 89.
https://digitalcommons.library.umaine.edu/ers_facpub/89
Citation/Publisher Attribution
Nettles, M, Larsen, TB, Elosegui, P, Hamilton, GS, Stearns, LA, Ahlstrom, AP, Davis, JL, et al., 2008, Step-Wise Changes in Glacier Flow Speed Coincide With Calving and Glacial Earthquakes at Helheim Glacier, Greenland: Geophysical Research Letters, v. 35, L24503. To view the published open abstract, go to http://dx.doi.org and enter the DOI.
Publisher Statement
© Copyright 2008 American Geophysical Union
DOI
10.1029/2008GL036127
Version
publisher's version of the published document
Rights Statement
