Powerful solar flares herald flip in sun’s magnetic field
The dramatic uptick in the number of solar flares over the past few weeks, especially the powerful X-class flares, is a good sign that the impending change in the sun’s magnetic field is drawing nearer.
Our sun is a variable star. While some variable stars swing through active and quiet periods very quickly or very haphazardly, our sun works on a fairly regular schedule lasting about 11 years or so. At times like now, when it’s reaching solar maximum, its surface is typically dotted with a multitude of sunspots and it’s throwing off solar flares and coronal mass ejections on nearly a daily basis, and at solar minimum its surface is very quiet.
This cycle is closely tied to the sun’s magnetic field, which changes polarity on roughly the same schedule. At solar minimums, the magnetic fields running through the sun are roughly lined up, with a strong, well-defined magnetic north pole and south pole. At solar maximums, like now, everything devolves into chaos as the overall magnetic polarity virtually disappears, causing the increase in solar flares and eruptions. The polarity doesn’t just go back to the same direction at each solar minimum though, it flips back and forth between one direction and the other.’