@article{fdi:010067684,
  title = {{F}ault geometry of the {M}-{W} 7.7 western {I}ndia intraplate earthquake : constrained from double-difference tomography and fault-plane solutions},
  author = {{S}ingh, {A}. {P}. and {D}orbath, {C}atherine and {K}umar, {M}. {R}. and {K}umar, {S}. and {C}haudhary, {I}. and {K}ayal, {J}. {R}.},
  editor = {},
  language = {{ENG}},
  abstract = {{G}lobally, one of the largest intraplate earthquakes of {M}-w 7.7 occurred on 26 {J}anuary 2001 in the {K}achchh rift basin ({KRB}), western {I}ndia. {T}he continuing long aftershock sequence over decades has generated much debate on the seismogenic fault(s). {W}e have analyzed more than 10,000 aftershocks ({M}-w > 1.0) recorded by a 50-station broadband network in the region during 2006-2014. {A} total of 834 after-shocks ({M}-w > 2.4), each recorded by at least eight broadband seismic stations with a minimum of eight {P} and six {S} phases, are relocated in this study by double-difference tomography (tomo{DD}) method. {T}he relocated aftershocks and velocity images reveal a near-vertical or steeply south-dipping deeper structure as the source zone of the mainshock and aftershocks; the structure correlates well with the geologically mapped {S}outh {W}agad fault ({SWF}). {A}mong the other geologically known faults, the {K}achchh {M}ainland fault ({KMF}) and the {G}edi fault ({GF}) are also well identified in the seismic sections. {F}urther, fault-plane solutions of 109 aftershocks having {M}-w = 3.5 corroborate well with the known faults. {T}he geological model and seismological observations suggest that the {SWF} overstepped the {KMF} and intersects it at depth. {T}he intersecting fault zone is the source area for the deeper (10-35 km) reverse faulting earthquakes in the {KRB}. {A}t the fault end of the {SWF}, a heterogeneous velocity structure is imaged, which is attributed to a fluid-filled rock matrix that triggered the mainshock. {O}n the other hand, the {GF} is reported to be a later-activated fault to the north of {SWF}; it generated some shallower aftershocks (0-20 km) mostly by strike-slip mechanisms.},
  keywords = {{INDE}},
  booktitle = {},
  journal = {{B}ulletin of the {S}eismological {S}ociety of {A}merica},
  volume = {106},
  numero = {4},
  pages = {1446--1460},
  ISSN = {0037-1106},
  year = {2016},
  DOI = {10.1785/0120150280},
  URL = {https://www.documentation.ird.fr/hor/fdi:010067684},
}