Earth ejects plasma like any member of the hierarchy.
The Tunguska event, usually ascribed to an inpact, is better explained as a plasma ejection. See www.geocities.com/CapeCanaveral/Cockpit/3240/.
Similarly, the rock/carbon deposits containing buckminster fullerenes (bucky balls) found in Karelia – www.ornl.gov/info/ornlreview/rev26-2/text/rndmain1.html.
Even the BBC is latching on to the idea that some flying saucers/UFOs sightings can be explained by plasma ejection – news.bbc.co.uk/1/hi/uk/4981720.stm.