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Title: | A rheological model of post-seismic response due to 2004 sumatra-andaman earthquake: contribution from low viscosity lithosphere |
Authors: | Reddy, C.D. Prajapati, Sanjay K. Kato, Teruyuki |
Keywords: | Post-seismic response Rheological model Low viscosity lithosphere |
Issue Date: | 2009 |
Citation: | Journal of Earthquake and Tsunami, v.3/1, p.25-34, 2009, doi: 10.1142/S1793431109000408 |
Abstract: | The Sumatra earthquake on December 26, 2004 provided an excellent opportunity to investigate the post-seismic crustal deformation and thereby understand the rheology of the crust and mantle. Subsequent to this earthquake, we monitored the post-seismic deformation at strategically located five continuous GPS sites in Andaman and Nicobar region. The post-seismic transients are obtained and the viscoelastic modeling has been carried out. Post-seismic flow below a depth of 55–60 km with low viscosity of the order of 1019 Pa S can explain observed far field motion. There is also a contribution from upper mantle to post-seismic deformation which follows power law rheology. These results lead us to infer that the Sumatra-Andaman mechanical lithosphere is about at ~55 km depth. |
URI: | http://localhost:8080/xmlui/handle/123456789/526 |
Appears in Collections: | SEG_Reprints |
Files in This Item:
File | Description | Size | Format | |
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PrajapatiS_ReddyCD_JEarthqukTsunami_2009.pdf Restricted Access | Reprint | 1.39 MB | Adobe PDF | View/Open Request a copy |
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