Time Domain Electromagnetic Survey

Time Domain Electromagnetic Survey:

Measurement of the electric or magnetic fields at the Earth's surface or in boreholes in order to map variations in the Earth's electrical properties (resistivity, permeability or permitivity).

Transmitter Assembly
Magnetic sensor
Loop wire


  • Location of geological faults
  • Mineral exploration
  • Groundwater surveys
  • Geothermal resource investigations

Electrical Survey


  • ISR has started geophysical surveys for Geothermal Energy in Gujarat state. ISR has pioneered a technique of 3D MT imaging of crust. Geological faults and crustal structure have been mapped in Kachchh.
  • ISR is carrying out Multiparametric Geophysical and Geochemical studies in Kachchh for earthquake prediction research.
  • ISR has upgraded Gujarat State Seismic Network from 19 online seismic stations to 40.