Articles | Volume 10, issue 1
The Cryosphere, 10, 385–399, 2016
https://doi.org/10.5194/tc-10-385-2016
The Cryosphere, 10, 385–399, 2016
https://doi.org/10.5194/tc-10-385-2016

Research article 16 Feb 2016

Research article | 16 Feb 2016

Tremor during ice-stream stick slip

B. P. Lipovsky and E. M. Dunham

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Cited articles

Aki, K. and Richards, P. G.: Quantitative Seismology, University Science Books, Sausalito, p. 23 and 110–111, 2002.
Alley, R. B.: In search of ice-stream sticky spots, J. Glaciol., 39, 447–454, 1993.
Alley, R. B., Anandakrishnan, S., Bentley, C. R., and Lord, N.: A water-piracy hypothesis for the stagnation of Ice Stream C, Antarctica, Annal. Glaciol., 20, 187–194, https://doi.org/10.3189/172756494794587032, 1994.
Ampuero, J.-P. and Dahlen, F.: Ambiguity of the moment tensor, Bull. Seis. Soc. Amer., 95, 390–400, https://doi.org/10.1785/0120040103, 2005.
Anandakrishnan, S. and Alley, R.: Ice Stream C, Antarctica, sticky spots detected by microearthquake monitoring, Ann. Glaciol., 20, 183–186, https://doi.org/10.3189/172756494794587276, 1994.
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Small repeating earthquakes occur at the ice-bed interface of the Whillans Ice Stream, West Antarctica. The earthquakes occur as rapidly as 20 earthquakes/s. We conduct numerical simulations of these earthquakes that include elastic and frictional forces as well as seismic wave propagation. We create synthetic seismograms and compare these synthetics to observed seismograms in order to constrain subglacial parameters. We comment on decadal-scale changes in these parameters.