Earth's ionosphere reacts strongly to the intense x-ray and ultraviolet radiation released by the Sun during a solar event. By using a receiver to monitor the signal strength from distant VLF transmitters, and noting unusual changes as the waves bounce

https://www.powershow.com/view4/482263-MTM0N/Earths_ionosphere_reacts_strongly_to_the_intense_x-ray_and_ultraviolet_radiation_released_by_the_Sun_during_a_solar_event_By_using_a_receiver_to_monitor_the_signal_strength_from_distant_VLF_transmitters_and_noting_unusual_changes_as_the_waves_bounce_powerpoint_ppt_presentation