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This phenomenon is most pronounced at the lower end of the HF frequency range, where it can cause a complete communications blackout that lasts for several minutes to several hours. In this case, an amateur station can try switching to a higher frequency to continue HF communications.
Since ultraviolet light and x-rays are electromagnetic waves, they travel at the speed of light, and take about 8 minutes to travel from the Sun to the Earth.
スパイの動きがキレキレでした!またよろしくお願いします(^^)