Diameter of the Sun: 1,391,000 km
Distance from Earth: 149.6 million km
(both are means)
So, the idea of a corona discharge, or even a flare, reaching out 100x - 150x the mean diameter of the sun is not outside the realm of 'thinkable'.
It WOULD be a HUGE one - and such events may be 'extinction' type events .... if one REALLY buys into evolution. However, there IS the concept that G_d did NOT create a 'young' earth - but one that already had a lot of 'history' (ie. age) built into it. With His sense of humour, adding 'extinction' events into what He created is certainly not beyond the conceivable. *w*
Neat pic - never even occurred to me that it would still be around - much less pictures available.