Physics – Geophysics
Scientific paper
Feb 2006
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006georl..3303313s&link_type=abstract
Geophysical Research Letters, Volume 33, Issue 3, CiteID L03313
Physics
Geophysics
5
Marine Geology And Geophysics: Subduction Zone Processes (1031, 3613, 8170, 8413), Oceanography: Physical: Tsunamis And Storm Surges, Seismology: Earthquake Source Observations (1240), Seismology: Subduction Zones (1207, 1219, 1240)
Scientific paper
Although several studies suggest that a slow slip followed the seismic slip on the northern half of the 1300-km long plate interface that ruptured during the great Sumatra-Andaman earthquake, the onset and duration of the slow slip remain unresolved. In this paper we analyze a tide gauge record at Port Blair, situated about 1000 km north of the epicenter. Our preferred model, which fits the observed data well, consists of a mixed mode of slip: ~half of the total slip occurring seismically in less than 5 min after the rupture arrival and the rest developing in the next 30 min. A scenario of slow slip on the northern half of the rupture area, that is consistent with seismic data, and GPS data, consists of slip on the time scale of <35 min over some parts of the fault, such as below Port Blair, and > 1 hour over the rest.
Gupta Harsh K.
Ortiz Mauricio
Ramadass G. A. D.
Singh Sanjay Kumar
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