Estimation of coda wave attenuation for NW Himalayan region using local earthquakes
IR@C-MMACS: CSIR-Centre for Mathematical Modelling and Computer Simulation, Bangalore
View Archive Info| Field | Value | |
| Title |
Estimation of coda wave attenuation for NW Himalayan
region using local earthquakes
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| Creator |
Parvez, Imtiyaz A
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| Subject |
Computational Seismology
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| Description |
The attenuation of seismic wave energy in NW Himalayas has been estimated using local earthquakes. Most of the analyzed
events are from the vicinity of the Main Boundary Thrust (MBT) and the Main Central Thrust (MCT), which are well-defined
tectonic discontinuities in the Himalayas. The time-domain coda-decay method of a single back-scattering model is employed
to calculate frequency dependent values of Coda Q (Qc). A total of 36 local earthquakes of magnitude range 2.1–4.8 have been
used for Qc estimation at central frequencies 1.5, 3.0, 6.0, 9.0, 12.0 and 18.0 Hz through eight lapse time windows from 25 to
60 s starting at double the time of the primary S-wave from the origin time. The estimated average frequency dependence quality
factor gives the relation, Qc = 158f1.05, while the average Qc values vary from 210 at 1.5 Hz to 2861 at 18 Hz central frequencies.
The observed coda quality factor is strongly dependent on frequency, which indicates that the region is seismic and tectonically
active with high heterogeneities.
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| Publisher |
Elsevier
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| Date |
2005-03-20
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| Type |
Article
PeerReviewed |
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| Format |
application/pdf
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| Identifier |
http://cir.cmmacs.ernet.in/51/1/pepi%2Dcoda%2D2005.pdf
Parvez, Imtiyaz A (2005) Estimation of coda wave attenuation for NW Himalayan region using local earthquakes. Physics of the Earth and Planetary Interiors, 151. 243-258. |
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| Relation |
http://www.elsevier.com/locate/pepi
http://cir.cmmacs.ernet.in/51/ |
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