Abstract
Recent observations of the reflection and absorption of radio waves have afforded much information regarding the behavior of the ionosphere during a radio fade‐out of the type occurring at the time of conspicuous outbursts in the chromosphere of the Sun. Berkner and Wells [see 1 under “References” at end of paper], using the automatic multifrequency technique, have studied the detailed behavior of the ionized layers during a fade‐out and find that conditions in the F1‐ and F2‐regions undergo essentially no change. In the E‐region a small increase in virtual height and maximum ion‐density seems to occur. After the E‐region conditions have returned to normal, abnormal absorption of the exploring radio waves is still observed, showing that absorption occurs below the maximum of the E‐region ionization.
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