No evidence of unusually large postseismic deformation in Andaman region immediately after 2004 Sumatra-Andaman earthquake
IR@C-MMACS: CSIR-Centre for Mathematical Modelling and Computer Simulation, Bangalore
View Archive Info| Field | Value | |
| Title |
No evidence of unusually large postseismic deformation in Andaman
region immediately after 2004 Sumatra-Andaman earthquake
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| Creator |
Jade, Sridevi
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| Subject |
Geophysics
Global Positioning System |
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| Description |
Static offsets due to the 26 December 2004 Sumatra-
Andaman earthquake have been reported from the campaign
mode GPS measurements in the Andaman-Nicobar region.
However, these measurements contain contributions from
postseismic deformation that must have occurred in the 16–
25 days period between the earthquake and the measurements.
We analyse these and tide gauge measurements of coseismic
deformation, a longer time series of postseismic deformation
from GPS measurements at Port Blair in the South Andaman
and aftershocks, to suggest that postseismic displacement
not larger than 7 cm occurred in the 16–25 days following
the earthquake in the South Andaman and probably
elsewhere in the Andaman Nicobar region. Earlier, this
contribution was estimated to be as large as 1 m in the
Andaman region, which implied that the magnitude of the
earthquake based on these campaign mode measurements
should be decreased.We suggest an Mw for this earthquake
as 9.23.
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| Publisher |
American Geophysical Union
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| Date |
2008-03-28
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| Type |
Article
PeerReviewed |
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| Format |
application/pdf
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| Identifier |
http://cir.cmmacs.ernet.in/136/1/gahalaut_grl08.pdf
Jade, Sridevi (2008) No evidence of unusually large postseismic deformation in Andaman region immediately after 2004 Sumatra-Andaman earthquake. Geophysical Reserach Letters, 35 (L10307). |
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| Relation |
http://www.agu.org/journals
http://cir.cmmacs.ernet.in/136/ |
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