Quiescent activity of Io observed in 2010 & 2011 showing the several quasi-permanent eruptions in Lp band (at ~3?m) [bottom] and the absence of bright outbursts or young eruptions in K band (at ~2 ?m)... more 
Quiescent activity of Io observed in 2010 & 2011 showing the several quasi-permanent eruptions in Lp band (at ~3?m) [bottom] and the absence of bright outbursts or young eruptions in K band (at ~2 ?m) [top]. less 
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SPACE.com | Photo By F. Marchis
Fri, Nov 2, 2012 11:18 AM EDT