Solar Flare Calendar 2025. The 2019 panel, convened by noaa, nasa, and the international space environment services (ises), predicted that solar cycle 25, following a relatively weak solar. This was the largest solar flare observed by noaa’s space weather.

Solar maximum is expected in july 2025, with a peak of 115 sunspots. This solar flare is the largest of solar cycle 25 and is classified as an x8.7 flare.