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An early view of the loop-loop interaction idea, inspired by solar radio type III and type V bursts. The latter is not so much studied these days, but can readily be seen on meter-wave radio spectrograms. This cartoon may have originated with De Jager, but it went on to fame and glory in other hands. The Archivist takes a dim view of appealing to loop-loop interactions in general (what's a loop, and what's outside of it?).
For non-experts, the type III bursts are the "fast drift" phenomenon known to reflect the presence of weakly relativistic electron beams. Type V is an extension, like a little flag, at the long-wavelength ends of a type III group.
March 23, 2009