A deterministic seismic hazard map of India and adjacent areas
IR@C-MMACS: CSIR-Centre for Mathematical Modelling and Computer Simulation, Bangalore
View Archive Info| Field | Value | |
| Title |
A deterministic seismic hazard map of India and adjacent areas
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| Creator |
Parvez, Imtiyaz A
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| Subject |
Computational Seismology
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| Description |
A seismic hazard map of the territory of India and adjacent areas has been prepared using
a deterministic approach based on the computation of synthetic seismograms complete with
all main phases. The input data set consists of structural models, seismogenic zones, focal
mechanisms and earthquake catalogues. There are few probabilistic hazard maps available for
the Indian subcontinent, however, this is the first study aimed at producing a deterministic
seismic hazard map for the Indian region using realistic strong ground motion modelling with
the knowledge of the physical process of earthquake generation, the level of seismicity and
wave propagation in anelastic media. Synthetic seismograms at a frequency of 1 Hz have been
generated at a regular grid of 0.2◦ × 0.2◦ by the modal summation technique. The seismic
hazard, expressed in terms of maximum displacement (Dmax), maximum velocity (Vmax), and
design ground acceleration (DGA), has been extracted from the synthetic signals and mapped
on a regular grid over the studied territory. The estimated values of the peak ground acceleration
are compared with the observed data available for the Himalayan region and are found to be
in agreement. Many parts of the Himalayan region have DGA values exceeding 0.6 g. The
epicentral areas of the great Assam earthquakes of 1897 and 1950 in northeast India represent
the maximum hazard withDGAvalues reaching 1.2–1.3 g. The peak velocity and displacement
in the same region is estimated as 120–177 cm s−1 and 60–90 cm, respectively.
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| Publisher |
Wiley-BlackWell
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| Date |
2003-10-11
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| Type |
Article
PeerReviewed |
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| Format |
application/pdf
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| Identifier |
http://cir.cmmacs.ernet.in/33/1/gji%2D2003.pdf
Parvez, Imtiyaz A (2003) A deterministic seismic hazard map of India and adjacent areas. Geophysical Journal International, 155. pp. 489-509. ISSN 1365-246X |
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| Relation |
http://www.wiley.com
http://cir.cmmacs.ernet.in/33/ |
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