@TonyVladusich@dougmerritt The conspiracist's counterargument to "the HAARP array is in Alaska" is to say that there's actually a vast network of HAARP emitters all over the world, which is... half-true? There have been other ionospheric-heating experiments in different places, a couple of which are still operating.
But my impression is that the best these can really do in terms of visual effects is to boost the general skyglow that astronauts see as a thin glowing shell surrounding the Earth. To really make a proper aurora, like the ones we saw, you'd need to inject a lot of high-energy charged particles into the magnetosphere, which is what the Sun does.
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