Yesterday, sunspot AR2838 burst through the surface of the sun and promptly unleashed the strongest solar flare in 4 years, an X1.5-class explosion. As quickly as it appeared, the sunspot is already gone. On July 4th it rotated over the sun’s northwestern limb and will spend the next two weeks transiting the far side of the sun. If AR2828 holds itself together, it will re-appear on the Earthside in late July.
Mike Terry to WOR iog (2021-07-04)