Time reversal location of glacial earthquakes
Article first published online: 25 SEP 2008
Copyright 2008 by the American Geophysical Union.
Journal of Geophysical Research: Solid Earth (1978–2012)
Volume 113, Issue B9, September 2008
How to Cite
2008), Time reversal location of glacial earthquakes, J. Geophys. Res., 113, B09314, doi:10.1029/2008JB005607., , , and (
- Issue published online: 25 SEP 2008
- Article first published online: 25 SEP 2008
- Manuscript Accepted: 22 JUL 2008
- Manuscript Revised: 17 JUN 2008
- Manuscript Received: 22 JAN 2008
- glacial earthquakes;
- time-reversal imaging;
- source parameters
 In 2003, Ekström et al. reported the detection and location of a new class of earthquakes occurring in the polar regions of the Earth. The proposed source mechanism involves large and sudden sliding motions of glaciers, which gave the name “glacial earthquakes” to these events. In this study we localize some of these earthquakes with a time reversal mirror (TRM) algorithm, which, contrary to ordinary back projection methods, does not involve testing each possible source location. In TRM localization, an earthquake is located on the basis of only one 3-D spectral element simulation of seismic wave propagation by using the full complexity of recorded data as simultaneous time-reversed sources. We show that on the basis of this approach, even glacial earthquakes with a faint signal can be correctly localized and that the pattern of the time-reversed wavefield is coherent with the motion of glaciers down their valley.