MAGNETO-TELLURIC (MT)

About:

• The National Capital Region of Delhi experienced 4 small earthquakes during April – August 2020. These earthquakes were followed by a dozen of micro-events (M<3.0) including, a few aftershocks.
  
  
• All these events were located by the National Seismological Network (NSN), being operated and maintained by National Seismological Centre (NCS), Ministry of Earth Sciences.
  
  
• 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.