Geophysical Research Letters
Rights and Access Note
This Item is protected by copyright and/or related rights. You are free to use this Item in any way that is permitted by the copyright and related rights legislation that applies to your use. In addition, no permission is required from the rights-holder(s) for educational uses. For other uses, you need to obtain permission from the rights-holder(s).
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.
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.
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.
© Copyright 2008 American Geophysical Union
publisher's version of the published document