Ionospheric VHF scattering near the magnetic equator during partial counter electrojet

During periods of partial counter electrojet, i.e. when ΔH at an equatorial station is positive but lees than ΔH at a non-equatorial low latitude station, the scatter echoes of VHP radio wares from the E-region of the ionosphere are shown to disappear. These events are suggested due to simultaneous flow of eastward current near the peak ionication level of the E-region and the westward current at the base of the E-region