Strong X1.1 solar flare erupts from AR 3615
A strong X1.1 solar flare erupted from Active Region 3615 at 20:56 UTC on March 28, 2024. The event started at 20:50 and ended at 21:01 UTC.
G3 – Strong geomagnetic storm predicted for March 25; 19 M-class flares in 25 hours
Coronal mass ejection (CME) produced by the X1.1 solar flare at 01:33 UTC on March 23, 2024, is expected to impact Earth late March 24 or early March 25, producing G2 – Moderate to G3 – Strong geomagnetic storming.
Major, long-duration X1.1 solar flare produces Earth-directed CME
A major, long-duration solar flare measuring X1.1 erupted from Active Region 3614 at 01:33 UTC on March 23, 2024. The event started at 00:58 and ended at 02:21 UTC. A halo CME was produced, with impacts to Earth likely late March 25 or early March 26.
Major X6.3 solar flare erupts from Region 3590
A major X6.3 solar flare erupted from Active Region 3590 at 22:34 UTC on February 22, 2024. The event started at 22:08 UTC and ended at 22:43.
Two X-class solar flares – X1.8 and X1.7 erupt from Region 3590
Two X-class solar flares erupted over the past 9 hours — the first was X1.8 at 23:07 UTC on February 21 and the second X1.7 at 06:32 UTC on February 22, 2024. Both erupted from Active Region 3590.
Major X2.5 solar flare erupts from AR 3576, producing large CME
An impulsive solar flare measuring X2.5 erupted from Active Region 3576 (beta-gamma) at 06:53 UTC on February 16, 2024. The event started at 06:42 and ended at 06:58 UTC. This is the fourth strongest solar flare of Solar Cycle 25 — after X5.0 on December 31, 2023, X3.3 on February 9, 2024, and X2.8 on December 14, 2023.
Major X3.3 solar flare erupts behind the SW limb, S2 – Moderate solar radiation storm
A powerful solar flare measuring X3.3 erupted behind the SW limb of the Sun (AR 3575) at 13:14 UTC on February 9, 2024. This solar flare is the second most intense in Solar Cycle 25, following an X5.0 flare that occurred on January 31, 2023.
Major X5.0 solar flare erupts from Region 3536 — the strongest flare of Solar Cycle 25
A major X5.0 solar flare erupted from Active Region 3536 at 21:55 UTC on December 31, 2023. The event started at 21:36 and ended at 22:08 UTC. This is now the strongest solar flare of the current solar cycle — Solar Cycle 25 — and the strongest flare since X9.3 on September 6, 2017.
X2.8 solar flare produces Earth-directed CME, impact expected late December 16 to early December 17
A major solar event occurred on December 14, 2023, when a powerful solar flare measuring X2.8 erupted from Active Region 3514. This event, which started at 16:47 and ended at 17:12 UTC, is the strongest solar flare since September 10, 2017, and the strongest solar flare of the current Solar Cycle.
Major X2.8 solar flare erupts from Region 3514
A powerful solar flare measuring X2.8 erupted from Active Region 3514 at 17:02 UTC on December 14, 2023. The event started at 16:47 and ended at 17:12 UTC. This is the strongest solar flare of the current Solar Cycle.