x-class

Active Region 4274 produced its second X-class solar flare since it emerged from the far side last week, this time peaking as X1.2 at 09:19 UTC on November 10, 2025. This is now the third X-class flare since the November 4 X1.8 and X1.1. A coronal mass ejection (CME) was associated with the latest event and is expected to have an Earth-directed component.

A major long-duration solar flare measuring X1.7 erupted from Active Region 4274 at 07:35 UTC on November 9, 2025, producing an assymetric halo CME with impact expected around 12:00 UTC on November 11. The event started at 07:01 and ended at 07:55 UTC.

Two powerful X-class solar flares erupted on November 4, 2025 — an X1.8 from Region 4274 and an X1.1 from a region just beyond the east limb — launching CMEs largely off the solar limb. NOAA forecasts G1 – Minor to G2 – Moderate geomagnetic storming from late November 6 into 7 as Earth may experience a glancing shock from the flares combined with a coronal hole high-speed stream.

A major solar flare measuring X1.8 erupted from Active Region 4274 at 17:34 UTC on November 4, 2025. The event started at 17:15 and ended at 17:51 UTC. This is the first X-class flare since the impulsive X1.9 from Active Region 4114 at 23:50 UTC on June 19, 2025.

A major solar flare measuring X1.1 erupted at 01:52 UTC on May 25, 2025, from Active Region 4098 located in the southwest quadrant. The event began at 01:46 UTC and ended at 01:57 UTC. Multiple associated radio bursts were detected between 01:48 and 01:53 UTC.