Skip to Main content Skip to Navigation
Journal articles

Time reversal location of glacial earthquakes

Abstract : 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.
Document type :
Journal articles
Complete list of metadata
Contributor : Nathalie POTHIER Connect in order to contact the contributor
Submitted on : Thursday, March 10, 2022 - 2:28:42 PM
Last modification on : Saturday, March 12, 2022 - 3:32:31 AM


Journal of Geophysical Researc...
Publisher files allowed on an open archive





Carène Larmat, Jeroen Tromp, Qinya Liu, Jean-Paul Montagner. Time reversal location of glacial earthquakes. Journal of Geophysical Research : Solid Earth, American Geophysical Union, 2008, 113, ⟨10.1029/2008JB005607⟩. ⟨insu-03603710⟩



Record views


Files downloads