000099656 001 __ 99656
000099656 005 __20141121163537.0
000099656 024 8_ $9 driver $9 artpubuab $a oai:ddd.uab.cat:99656
000099656 024 7_ $2 doi $a 10.1344/105.000001751
000099656 035 __ $9 articleid $a 16965728v10n3p309
000099656 041 __ $a eng
000099656 100 __ $a Singh, C. $u Indian Institute of Technology. Department of Geology and Geophysics
000099656 245 1_ $a Spatial variation of coda wave attenuation in the Southern Indian Shield and its implications
000099656 520 3_ $a During the recent past the Indian peninsular shield has experienced six damaging earthquakes of M 5.4-7.7 and compelled to readdress our understanding of the seismic attenuation characteristics for better evaluation of the seismic hazards in the so-called stable shield. We have performed the seismic attenuation study using coda waves of the broadband network from 1995 to 2009 for the shield region. About 400 local earthquakes M 2.5-4.0 within an epicentral distance of 250km are used in this study. The broadband seismic stations established are in different geological provinces, such as the Archaean Dharwar craton, the southern granulite terrain, the Proterozoic Cuddapah basin, the Godavari graben, the Cretaceous-Eocene Deccan volcanic province and in the Cambay basin. This allows us to understand the fluctuation of Q0 in terms of spatial variations in the geologic and tectonic provinces. The results reflect a ubiquitous observation of frequency dependence of Qc in the different geologic provinces. The rift basins exhibit lower Q0, which suggests higher attenuation due to a more heterogeneous structure. Higher Q0 in the western Dharwar craton infers lower attenuation. Similarly the Deccan volcanic province is characterized by significantly higher Q0. The results show a good correlation with the observed heat flow. The study fills an important gap in knowledge about the Q factor as well as of crustal attenuation conditions in the whole southern peninsular shield of India.
000099656 540 __ $9 info:eu-repo/semantics/openAccess $a Aquest document està subjecte a una llicència d'ús Creative Commons. Es permet la reproducció total o parcial, la distribució, la comunicació pública de l’obra i la creació d’obres derivades, fins i tot amb finalitats comercials, sempre i quan aquestes es distribueixin sota la mateixa llicència que regula l’obra original i es reconegui l’autoria de l’obra original. $u http://creativecommons.org/licenses/by-sa/3.0/es/ 59.
000099656 546 __ $a Anglès
000099656 599 __ $a recerca
000099656 653 1_ $a Coda Q
000099656 653 1_ $a Attenuation characteristics
000099656 653 1_ $a Indian peninsular shield
000099656 653 1_ $a Heat flow
000099656 655 _4 $a info:eu-repo/semantics/article
000099656 655 _4 $a info:eu-repo/semantics/publishedVersion
000099656 700 __ $a Basha, S.K. $u National Geophysical Research Institute
000099656 700 __ $a Shekar, M. $u National Geophysical Research Institute
000099656 700 __ $a Chadha, R.K. $u National Geophysical Research Institute
000099656 773 __ $g Vol. 10, Núm. 3 (setembre 2012), p. 309-318 $t Geologica acta $x 1696-5728
000099656 856 40 $p 10 $s 1069896 $u http://ddd.uab.cat/pub/geoact/geoact_a2012m9v10n3/geoact_a2012m9v10n3p309.pdf
000099656 973 __ $f 0309 $l 318 $m setembre $n 3 $v 10 $x geoact_a2012m9v10n3 $y 2012
000099656 980 __ $a ARTPUB $b UAB $b GEOACT