Why is Each Cygnus a Cygnus?

Wouldn't air&lightning make more sense? Then fire&earth (I still think meteor is more earth-based then firebased. Better would be a vulcanic eruption or something =P)

You know, it actually did start as a volcanic eruption back in kMST, where a volcano would rise behind the F/P AM instead of the circles we have now. The icon was different too and showed the volcano. Not sure why it was changed though.