Thursday, July 13, 2017
NEW LONE SUNSPOT GROUP
A new sunspot group has rotated into view and seems to be growing rather quickly (July 5-7, 2017). It is the first sunspot to appear after the sun was spotless for two days, and it is the only sunspot group on the sun at this moment. The time-lapse movie shows the spot growing as it rotates into view over a 42-hour period. It could be the source for some solar flares, but it is too early to predict just what it will do. To get a sense of scale, the dark core of the sunspot is larger than Earth. This group is called Active Region 12665.
Credit: Solar Dynamics Observatory, NASA.