Excerpt from a very strangely written but very interesting book on the Earth and cosmos' "natural radio" signals and the early evolution of communications technologies...

Art and music's relationship to electromagnetism and natural radio

"Earth currents associated with auroral display and storms on the sun were sensed on telegraph lines and heard on the telephone. Pairing nature and communications would also have been better tolerated late at night in the 1950s and 1960s, when distant, phantom-like radio stations faded in and out due to a drifting ionosphere, when communications were still under diurnal influence, when there was a night and day to speaking and listening."