The solar flare erupted from a sunspot seven times the width of the Earth.
"X FLARE IN PROGRESS!!! Sunspot region AR3354 near the NW limb just produced an X1.07 Flare . That is the 18th X flare during SC25 [Solar cycle 25, the current solar cycle] ."Strong also pointed out on Twitter that June 2023 marked the highest monthly average for sunspot numbers in 21 years. In a separate tweet, the solar physicistthat June 2023 marked the "HIGHEST MONTHLY AVERAGED SUNSPOT NUMBER SINCE SEPTEMBER 2002! The June 2023 SNN was 163.
Solar flares are created when magnetic fields around sunspots become tangled, break, and then reconnect, a process called reconnection. This footage of this flare appears to show that it was helped along by a plume of plasma, causing magnetized material to land on sunspot AR3354. An image of sunspots dotting the face of the sun on July 3, 2023 as imaged by NASA's Solar Dynamics Observatory.
Flares are grouped according to their strength, with the smallest flares called B-flares, which are followed by C-flares, then M-flares. The strongest class of solar flares are X-flares like that which was seen from AR3354 on Sunday. Solar flare classes increase in strength by magnitude, much as the Richter scale ranks earthquakes. That means that an X-class flare is ten times the strength of a M-class flare, and is 1,000 more powerful than a B-class flare.
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