Daily Current Affairs Article 8th January 2021: The National Capital Region of Delhi experienced 4 small earthquakes during April – August 2020, with the first event of magnitude 3.5 on 12 April 2020 in the northeastern boundary of NCT Delhi, during the prevailing lockdown time.
All these events were located by the National Seismological Network (NSN), being operated and maintained by National Seismological Centre (NCS), Ministry of Earth Sciences.
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Subsequently, NCS initiated the Magneto-telluric (MT), a geophysical survey over the Delhi region. This survey is carried out in collaboration with Wadia Institute of Himalayan Geology (WIHG), Dehradun.
Magneto-telluric (MT) is a geophysical method which uses natural time variation of the Earth’s magnetic and electric fields to understand geological (underground) structure and processes.
These measurements are conducted across three major seismic sources, namely Mahendragarh-Dehradun Fault (MDF), Sohna Fault (SF) and Mathura Fault (MF).
These measurements will ascertain the presence of fluid, which generally enhances the possibility of triggering of earthquakes.
