Document Type
Article
Department or Administrative Unit
Geological Sciences
Publication Date
1-30-2013
Abstract
The ability to monitor transient motion along faults is critical to improving our ability to understand many natural phenomena such as landslides and earthquakes. Here, we usedata from a GPS and seismometer network that were deployed to monitor the regularly repeating glacial earthquakes of Whillans Ice Stream, West Antarctica to show that a unique pattern of precursory slip precedes complete rupture along the bed of the ice stream. Additionally, we show that rupture can be independently tracked by increased levels of microseismic activity, including harmonic tremor, that are coincident with the onset of slip at any location, thus providing a remote means of monitoring stress and rupture propagation during the glacial earthquakes.
Recommended Citation
Winberry J. P., S. Anandakrishnan, D. A. Wiens, and R. B. Alley (2013), Nucleation and seismic tremor associated with the glacial earthquakes of Whillans Ice Stream, Antarctica, Geophys. Res. Lett., 40, 312–315, doi:10.1002/grl.50130.
Journal
Geophysical Research Letters
Rights
© 2013. American Geophysical Union. All Rights Reserved.
Included in
Geomorphology Commons, Geophysics and Seismology Commons, Glaciology Commons, Tectonics and Structure Commons
Comments
This article was originally published in Geophysical Research Letters. The full-text article from the publisher can be found here.