Study of following earthquake precursors
Continuous radon monitoring using RTM 2200
Schematic flowchart for radon monitoring as an earthquake precursor
Dual frequency GNSS Antenna receives the signals from GPS and GLONASS satellites revolving around the earth at the height of about 20,200 km. Each satellite continuously broadcasts a signal on two carrier frequencies f1=1575.42 MHz and f2=1227.76 MHz. The propagation delay is experienced by the satellite signals in the ionosphere. The differential time delay between f1 and f2 is used to calculate the Total electron content (TEC) along the ray path from satellite to receiver on the ground.
Sky plot of GPS and GLONASS Satellites
Subtle variations in atmospheric electric field observed during fair weather conditions may be caused by the preparation of a significant earthquake. Thus atmospheric electric field is studied as a potential earthquake precursor.
Zebra electric Field Mill Sensors installed at remote sites to measure the Vertical Electric Field (VEF) variations, a short term earthquake precursor