Hey All,
FASCINATING INFO !!!
I read along time ago( a bit fuzzy now) about ULF /whistler/ sferics being "conducted" down "tubes" in the magnetosphere and actually getting a measure of natural AMPLIFICATION from incoming solar radiation ,so far , the only known example of NATURAL radio amplification (??).
I also just read /printed a Hardcore Dx Medium Wave Propagation article by KN4LF, good stuff there.
de N1NQC