Sunspot region 2087 announced its arrival on the sun’s southeastern limb today with a real show of firepower. Like a double-barreled shotgun, the group blasted off an X2.2 flare at 6:42 a.m. CDT followed 70 minutes later by an X1.5 at 7:52.
Although neither was directly in line with Earth, ultraviolet light from the explosions caused a wave of ionization in our planet’s upper atmosphere that affected radio propagation over Europe. Images from NASA’s STEREO solar spacecraft show a coronal mass ejection moving off to one side of the side. It’s not expected to affect the Earth.
Interestingly, the ACE spacecraft, which measures changes in the direction of the magnetic field bundled with the solar wind, dipped south right around the time of the flares. While the two events may be unrelated, anytime the field tilts south, conditions are opportune for the sun’s particle wind to hook into Earth’s magnetic field and possibly fire up auroras.
Though it may not be related, the magnetic direction of the wind has been rapidly shifting from north and south all morning and afternoon. Solar astronomers had expected to see flares from sunspot regions 2080 and 2085. Both have complicated delta class magnetic fields ripe with the potential for sparking solar storms. Both also squarely face the Earth. Should an X-class flare erupt in either, the material ejected could wind up producing a geomagnetic storm and accompanying northern lights later this week. So far, they’ve been ‘quiet’ today.
There’s also a chance the plasma cloud released by the X-flare blasts could strike a glancing blow to Earth’s magnetic field; the new group may also continue to produce flares as it rotates into a favorable, Earth-facing position on the sun’s disk.