A Giant Hole in the Sun
Speaking of solar activity, a giant coronal hole opened up in the Sun’s northern hemisphere earlier this week, triggering auroras at high latitudes. Image made by the Solar Dynamics Observatory (SDO), via APOD. Click image to enlarge.
glenn b said,
August 28, 2010 @ 20:03:08
Now that looks scary to me. It seems as if the whole area is not burning like the rest of it. That makes an ignorant guy like me, with regard to the sun and how exactly it works, think that could mean trouble for us if true.
Cap'n Bob said,
August 29, 2010 @ 08:45:27
Coronal holes are not as vigorous a phenomenon as flares. The latter can cause power outages and other complex effects here on little old Earth.