Source parameters of two rift-associated intraplate earthquakes in peninsular India: the Bhadrachalam earthquake of April 13, 1969 and the Broach earthquake of March 23, 1970

Chung, Wai-Ying

doi:10.1016/0040-1951(93)90281-n

Cited by 52 publications

(19 citation statements)

References 19 publications

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“…7.35). Chung (1993) did waveform modelling of the P and SH waves recorded by the WWSSN, and gave a fault plane solution (c, Fig. 7.35), which is consistent with the strike slip solution (a) of Chandra (1977).…”

Section: Bhadrachalam Earthquake (M B 53) 1969supporting

confidence: 68%

Microearthquake Seismology and Seismotectonics of South Asia

Kayal¹

2008

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Section: Bhadrachalam Earthquake (M B 53) 1969supporting

confidence: 68%

Microearthquake Seismology and Seismotectonics of South Asia

Kayal¹

2008

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“…The Son Valley (1927, M 6.5), Satpura (1938, M 6.3), Balaghat (1957, M 5.5) andBroach (1970, M 5.4), and Jabalpur (1997, M 6.2) earthquakes are the large events associated with this structure. The available focal depths put Broach earthquake at 11 km depth (Chung 1993) whereas Satpura and Jabalpur events occurred at a depth of more than 35 km (Mukherjee 1942;Singh et al 1999). The 40 km focal depth of the Satpura event can be taken as only suggestive but the focal depth of 36 ± 2 km of the Jabalpur earthquake is well constrained .…”

Section: Tectonic Setup and Seismicitymentioning

confidence: 93%

Finite element modelling of elastic intraplate stresses due to heterogeneities in crustal density and mechanical properties for the Jabalpur earthquake region, central India

et al. 2008

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Deep lower crustal intraplate earthquakes are infrequent and the mechanism of their occurrence is not well understood. The Narmada-Son-lineament region in central India has experienced two such events, the 1938 Satpura earthquake and the 1997 Jabalpur earthquake, having a focal depth of more than 35 km. We have estimated elastic stresses due to the crustal density and mechanical properties heterogeneities along the Hirapur-Mandla profile passing through the Jabalpur earthquake region to analyse conditions suitable for the concentration of shear stresses in the hypocentral region of this earthquake. Elastic stresses have been computed by a finite element method for a range of material parameters. The results indicate that the shear stresses generated by the density heterogeneities alone are not able to locally enhance the stress concentration in the hypocentral region. The role of mechanical properties of various crustal layers is important in achieving this localization of stresses. Among a range of material parameters analysed, the model with a mechanically strong lower crust overlying a relatively weak sub-Moho layer is able to enhance the stress concentration in the hypocentral region, implying a weaker mantle in comparison to the lower crust for this region of central India.

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“…(b) ISC reported depth distribution of earthquakes in the NSL zone (after Gahalaut et al, 2004). The focal depth of the 1970 Broach and 1938 Satpura earthquakes are reported from Chung (1993) and Mukherjee (1942), respectively. Unfilled stars represents the restricted focal depths at 33 km.…”

Section: Seismic Structure and Surface Heat Flow Estimatesmentioning

confidence: 98%