Journal
GEOPHYSICAL RESEARCH LETTERS
Volume 34, Issue 4, Pages -Publisher
AMER GEOPHYSICAL UNION
DOI: 10.1029/2006GL028860
Keywords
-
Categories
Funding
- US NSF
- INGV
- Geophysical Institute, Prague
Ask authors/readers for more resources
Surface waves from the great Sumatra-Andaman earthquakes of 2004 and 2005 that cross Italy south of similar to 44 degrees N display Love-to-Rayleigh scattered waves (quasi-Love phases) diagnostic of sharp lateral gradients in the anisotropic properties of Earth's upper mantle. Surface waves that traverse Italy further north lack this distinctive phase, documenting a change in the upper mantle fabric that is corroborated by a shift in the fast polarization of shear wave birefringence. These observations suggest that orogen-parallel asthenospheric extension behind the retreating Apennines slab has limited geographical expression. We hypothesize that subduction rollback currently terminates at 44 degrees N, while the upper mantle flow pattern further to the north has been recently rearranged. Citation: Levin, V., J. Park, F. P. Lucente, L. Margheriti, and S. Pondrelli (2007), End of subduction in northern Apennines confirmed by observations of quasi-Love waves from the great 2004 Sumatra-Andaman earthquake, Geophys. Res. Lett., 34, L04304, doi: 10.1029/2006GL028860.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available