Magneto-telluric (MT) Method – UPSC Prelims

  • 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.
  • Why it is being done? 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.