What is Dellinger effect?
[[Solar flare]]s are large bursts of [[energy]] coming from the [[sun]]. On Earth, these flares disrupt [[radio]] communication. In years when there are many such flares, the energy they release can [[Ionization|charge]] what is known as the D-layer of the [[Ionosphere]], up to about {{convert|70|km}} above the earth. This changes the way this layer reflects or absorbs [[Shortwave radio|short wave]] radio waves. This effect only occurs on the day-side of the earth (on the night-side, there's little radiation from the sun. The effect will [[attenuation|atenuate]] signals with a frequency of up to 300 [[MHz]]. The phenomenon can last from several minutes, to several hours. In English, the effect is also called ''short wave fadeout''. [[Hans Mögel]], a German physicist first discovered the effect, around 1930. [[John Howard Dellinger]], an American telecommunications engineer, also described it, around 1935. For this reason, the effect is known as '''Delllinger effect''', or '''Mögel-Dellinger effect''' today. [[Category:Physics]] [[Category:Radio]]