Pre-seismic, co-seismic and post-seismic displacements associated with the Bhuj 2001 earthquake derived from recent and historic geodetic data
IR@C-MMACS: CSIR-Centre for Mathematical Modelling and Computer Simulation, Bangalore
View Archive Info| Field | Value | |
| Title |
Pre-seismic, co-seismic and post-seismic displacements
associated with the Bhuj 2001 earthquake derived from
recent and historic geodetic data
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| Creator |
Jade, Sridevi
Mukul, Malay Parvez, Imtiyaz A M B, Ananda |
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| Subject |
GNSS/GPS Geodesy
Computational Seismology |
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| Description |
The 26th January 2001 Bhuj earthquake occurred in the Kachchh Rift Basin which has a long his-
tory of major earthquakes. Great Triangulation Survey points (GTS) were _rst installed in the area
in 1856{60 and some of these were measured using Global Positioning System (GPS) in the months
of February and July 2001. Despite uncertainties associated with repairs and possible reconstruction
of points in the past century, the re-measurements reveal pre-seismic, co-seismic and post-seismic
deformation related to Bhuj earthquake. More than 25 _-strain contraction north of the epicenter
appears to have occurred in the past 140 years corresponding to a linear convergence rate of approx-
imately 10 mm/yr across the Rann of Kachchh. Motion of a single point at Jamnagar 150km south
of the epicenter in the 4 years prior to the earthquake, and GTS-GPS displacements in Kathiawar
suggests that pre-seismic strain south of the epicenter was small and di_ers insigni_cantly from
that measured elsewhere in India. Of the 20 points measured within 150km of the epicenter, 12
were made at existing GTS points which revealed epicentral displacements of up to 1m, and strain
changes exceeding 30 _-strain. Observed displacements are consistent with reverse co-seismic slip.
Re-measurements in July 2001 of one GTS point (Hathria) and eight new points established in
February reveal post-seismic deformation consistent with continued slip on the Bhuj rupture zone.
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| Publisher |
Indian Acadamy of Science, Bangalore
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| Date |
2003-09
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| Type |
Article
PeerReviewed |
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| Format |
application/pdf
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| Identifier |
http://cir.cmmacs.ernet.in/52/1/proceed%2D2003.pdf
Jade, Sridevi and Mukul, Malay and Parvez, Imtiyaz A and M B, Ananda (2003) Pre-seismic, co-seismic and post-seismic displacements associated with the Bhuj 2001 earthquake derived from recent and historic geodetic data. Proc. Indian Acad. Sci. (Earth Planet. Sci.),, 112 (3). pp. 331-345. ISSN ISSN 0253 2143 |
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| Relation |
http://www.ias.ac.in/jess/index_body.html
http://cir.cmmacs.ernet.in/52/ |
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