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Please use this identifier to cite or link to this item: http://repository.iitr.ac.in/handle/123456789/6174
Title: Macroseismic field observations of January 26th, 2001 Kachchh earthquake and its seismotectonics
Authors: Mahajan A.K.
Kumar S.
Kamal,
Published in: Journal of Asian Earth Sciences
Abstract: On the morning of January 26, 2001, a devastating earthquake of magnitude (Mw) 7.7, origin time 8 h 46 min 42.9 s, struck the Kachchh peninsula situated in the western India and was widely felt over the Indian subcontinent. The epicenter was located northeast of Bachau at 23.40° N, 70.28° E, with a focal depth of 25 km. It was the largest earthquake in India during the last five decades. Maximum intensity X according to the European Macroseismic Scale-98 (EMS-98) was observed in the meizoseismal zone. An isoseismal map shows an E-W trend with an elongation to the southeast direction. This earthquake caused widespread damage to poorly built buildings and framed structures up to 300 km from the epicenter zone. The damage distribution shows an asymmetric and heterogeneous pattern. The intensity attenuation is rapid in the northwest direction and slow towards the east and southeast direction. This earthquake produced widespread liquefaction in the Banni, Rann and along the coastal regions. The majority of 185 dam sites in the Kachchh region suffered minor to major damage. From the damage distribution and seismogenic effects, it can be inferred that the main shock was initiated along an E-W trending fault, north-northeast of Bachau. The pear shape isoseismal pattern might be caused by different seismic moment-rate release along this propagating rupture. © 2003 Elsevier Ltd. All rights reserved.
Citation: Journal of Asian Earth Sciences (2004), 23(1): 17-23
URI: https://doi.org/10.1016/S1367-9120(03)00096-8
http://repository.iitr.ac.in/handle/123456789/6174
Issue Date: 2004
Keywords: Earthquakes
Isoseist
Kachchh peninsula
Macroseismic field
Seismotectonics
ISSN: 13679120
Author Scopus IDs: 55668039000
57200399352
55608940500
Author Affiliations: Mahajan, A.K., Wadia Institute of Himalayan Geology, Dehradun, Uttaranchal 248001, India
Kumar, S., Wadia Institute of Himalayan Geology, Dehradun, Uttaranchal 248001, India
Kamal, Wadia Institute of Himalayan Geology, Dehradun, Uttaranchal 248001, India
Corresponding Author: Mahajan, A.K.; Wadia Institute of Himalayan Geology, Dehradun, Uttaranchal 248001, India; email: akmahajan@rediffmail.com
Appears in Collections:Journal Publications [ES]

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