Page 26 - Jabalpur_EQ

Chapter 2 Selsmologlcal Aspects

accelerographs are employed to record acceleration time history at various loca-
tions. This data can be used to study characteristics of strong ground shaking. As
there were no strong motion accelerographs installed in the epicentral region, an
attempt was made to record the duration of perceptible shaking as reported by
various people in different localities and is summarized in Table 2-4. Duration of
strong shaking ranges from 5-30 seconds and one of the conspicuous features is
that there is a significant reduction in the duration of shaking in the localities
lying on hard rock.

TABLE 2-4. Duration of shaking at different locations

Village Name Approx. Remarks
Duration
of Shaking
(seconds)

Kodariya 10 Locality close to epicenter
Chhattarpur 20-25 3 distinct shocks reported
Bhaneri 15
Jabera 10 Hard rock area
Nohta 10-12 Hard rock area
Garhakota 18 Up and down rocking motion
Damoh 15
Dharau 30-40
Padoria 15-20 3 distinct shocks reported

Rahli 5-10
Pan Umaria 25-30
Tendulkhera 30 Prominent surface wave effect was noticed
Mangdupura 20-25
Banvara 30 Prominent surface wave effect was noticed
Bijori 0
Pansokar 25 3 distinct shocks were noticed

Salimanabad 5-10
Katangi 15-20
Bhuri 15-20

Radius of Perceptibility

The radius of perceptibility (ROP) of the Jabalpur earthquake is about 250 km.
The reported ROP of various earthquakes which have occurred in the Peninsular
India are listed in Table 2-5, which varies from 170 km for the Broach earthquake
(M-5.4) to 700 km for Koyna earthquake (M^=6.0). It is evident that the ROP of
the Jabalpur earthquake is much less as compared to ROPs of comparable mag

Jabalpur Earthquake of May 22, 1997 16