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Chapter 2 Selsmological Aspects

Loss of human lives due to this earthquake was nmuch less in spite of its oxcur
rence in the provimity of densely populated areas because people were either
awake or sloeping outdoors. The maximum intensity assigned to this earthquake
is VIll on MMI scale and the same intensity was assigned by Gupta et al. (1997).
The study of damage pattern demonstrates that top soil cover has played a major
role. The m.ximum damage was in a zone measuring 22 by 12 km elongated in
NEN and SWS direction. The dimension of the maximum intensity curve indi-
cates short rupture and shallow nature of the source. The trends of isoseismal
lines are roughly in ENE and WSW direction which agrees with the rupture
direction and trends of the NSL. The change in the orientation of the isoseismal
lines may be due to the effect of the local geology and rupture direction. Lower
intensity in the South and higher intensity in the NW of Jabalpur was observed.
Sudden fall of intensity was seen beyond the Kaimur hills. The brick buildings
suffered relatively more damage than the mud buildings at a greater distance
from the epicenter. No evidence of permanent ground deformations like land-
slides, ground liquefaction, slump etc., were observed and the strong shaking
was a major factor in the widespread damage to built environment.

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quakes: a North-A tlantic passive margins Edited by Greger Sen and P.W.
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