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An Overview of Magnetotelluric Studies in the Seismogenic Zones of the Indian Subcontinent.

Patro PK, Dhamodharan S.

JOURNAL OF THE GEOLOGICAL SOCIETY OF INDIA

https://doi.org/10.17491/jgsi/2025/174186 

This synthesis of magnetotelluric (MT) studies across India’s earthquake-prone regions highlights conductive zones associated with deep fluids along faults, which are closely linked to seismic activity. Key seismogenic areas include the Himalayas, Kachchh, and the Deccan Volcanic Province. Observations from Koyna and Latur suggest that earthquakes in these regions may be reservoir-induced or caused by reactivated faults. The study also examines seismo-electromagnetic phenomena and underscores the potential of integrating MT data with other techniques—such as machine learning—for enhanced seismic hazard assessment and deeper geophysical understanding.

MT profiles are overlaid on the seismic zone map of India, after Podili and Raghukanth (2023), incorporating seismicity data from 1930 to 2022. The figure also includes a list of MT profiles discussed in this study, marked with solid lines.

Various MT geoelectrical models of the seismically active zones of the DVP are presented here. Please refer figure 1 for profile locations.

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