SIGNIFICANT SOLAR FLARE, NOT EARTH-DIRECTED: Magnetic fields snaking over the sun’s northeastern limb erupted on August 18th around 01:02 UT. The M5.5 class eruption was not Earth-directed, but it could herald a significant uptick in geoeffective solar activity as the new active region turns toward Earth in the days ahead. Solar flare alerts: text, phone.

NASA’s Solar Dynamics Observatory recorded the eruption:

from: Spaceweather.com