Page 31 - Jabalpur_EQ

Chapter 2
Selsmological Aspects

Period ofF
quie scence

OO O
o O0
o o
oo o
5
o
o o 0 8 o
O
4
OO0 o asDopl oo co
O
O

1800 60 80
YEARS

Figure 2-3. Temporal distribution of seismicity of the Peninsular India (Rao &
Rao 1984).

visions the Jabalpur earthquake (1997) has occurred in the Narmada seismicity
zone which follows the ENE course of the Narmada river. The Narmada river
exhibit a remarkable straight course over the entire length of about 800 km and
due to this it is postulated that the course of this river is guided by a long straight
fault, namely the Narmada fault, which joins to the East with the Son fault and
the Tapti river.

The significant earthquakes of Narmada seismicity zone are (Chandra, 1977)
1. The Son valley earthquake of June 2, 1927 (M=6.5) was felt as far as Ranchi,
Delhi and Allahabad and the radius of perceptibility was about 350 km.
2. The Satpura earthquake of March 14, 1938 (M-6.3) was felt over a very
large area of about 1 000 000 sq. km. The radius of perceptibility was about
500 km. The felt area of this earthquake was extended upto Delhi to the
North and Belgaon to the South.
3. The Balaghat earthquake of August 25, 1957 (M=5.5) was felt at Nagpur
Mandia, Gondie, Umeria and Jabalpur.
4. 23,
The Broach earthquake of March 1970 (M=5.4) occurred near the junc-
tion of Panvel, Narmada, Girner and Cambay, and was felt in Southern
Gujrat.d Bombay. The radius of perceptibility was about 170 km. The
damage caused by this earthquake was confined to a narrow belt (1 15 km
wide) along the Narmada river.

Jabalpur Earthquake of May 22, 1997 21