An X1.0 solar flare erupted from Active Region 4455 at 11:28 UTC on June 3, 2026, producing R3 – Strong radio blackout conditions on the sunlit side of Earth. This is the third major flare from the same region today, following M9.3 at 01:36 UTC and M7.7 at 07:00 UTC.
A moderately strong solar flare measuring M1.9 erupted from geoeffective Active Region 4436 at 16:12 UTC on May 16, 2026. A coronal mass ejection (CME) was produced, but analysis remains incomplete pending coronagraph imagery.
Multiple M-class solar flares, including M1.6 and M4.4, erupted on April 23, 2026, producing coronal mass ejections (CMEs). Meanwhile, Active Region 4420 exhibited significant growth in area and magnetic complexity as it moves toward the center of solar disk, raising the potential for Earth-directed CMEs in the days ahead.
A major solar flare measuring X1.1 erupted from Active Region 4298 at 05:01 UTC on December 8, 2025. The event started at 04:49 and ended at 05:04 UTC.
UK researchers report that radiation levels at commercial flight altitudes reached their highest values in 20 years following the X5-class solar flare on November 11, 2025, with the resulting Ground Level Enhancement driving single-event upset rates in avionics not seen since 2006.
A major solar flare measuring X1.2 erupted from Active Region (AR) 3947 at 11:39 UTC on January 3, 2025. This is the first X-class solar flare of 2025. The event started at 11:29 and ended at 11:49 UTC.
A major solar flare measuring X2.1 erupted from Active Region 3842 at 19:13 UTC on October 7, 2024. The event started at 19:02 and ended at 19:31 UTC.
A major solar flare measuring X7.1 erupted from Active Region 3842 at 22:20 UTC on October 1, 2024, producing a CME that most likely has an Earth-directed component. This is the second-strongest solar flare of Solar Cycle 25.
A strong, long-duration solar flare measuring M9.7 erupted from Active Region 3697 at 01:49 UTC on June 8, 2024. The event started at 01:23 and ended at 02:19 UTC, producing a strong CME. Shortly after, solar radiation storming began on Earth, reaching the S3 – Strong threshold at 08:00 UTC.
A major solar flare measuring X2.8 erupted from the Sun’s southeast limb at 07:08 UTC on May 27, 2024, producing a strong coronal mass ejection (CME). The event started at 06:49 and ended at 07:25 UTC.
