Moderate M1.1 solar flare erupts at 14:30 UTC on April 25, 2026

A moderate M1.1 solar flare erupted at 14:30 UTC on April 25, 2026.

Today’s flares include an M1.3 that began at 07:56 UTC, peaked at 07:59 UTC, and ended at 08:03 UTC from region 4423, along with multiple C-class flares originating from active regions 4423, 4425, 4420, 4419, and 4424 at various times throughout April 25, 2026.

In 24 hours to 12:30 UTC on April 25, solar activity was at high levels, with regions 4419 and 4423 producing the most flare activity. The largest flare was an M6.4, and additional M-class and multiple C-class flares were recorded. Newly numbered region 4425 also produced several C-class flares.

Solar activity is expected to be at low levels, with M-class flares (R1 – Minor to R2 – Moderate) likely, and a chance for X-class (R3 – Strong or greater) flares through April 27, mainly due to activity from regions 4419, 4420, 4423, and 4425.

Active sunspot regions presently observed on the Earth-facing solar disk include AR 4419 (N15W79 – Beta-Gamma-Delta), AR 4420 (N17E10 – Beta-Gamma-Delta), AR 4421 (S11E24 – Alpha), AR 4423 (S05E30 – Beta-Delta), AR 4424 (N17E45 – Beta), and AR 4425 (N06E76 – Beta).

Over the past 24 hours, the greater than 2 MeV electron flux at geosynchronous orbit reached high levels with a peak of 5 740 pfu. The greater than 10 MeV proton flux remained near background levels. Electron flux is expected to remain moderate to high through April 27, while proton flux is expected to remain at background levels but could exceed S1 – Minor thresholds following activity in regions 4419 and 4420.

Solar wind parameters reflected near-background conditions, with total field strength ranging 3–9 nT, the Bz component varying between +/- 5 nT, and wind speeds between 350–450 km/s. The phi angle shifted to a positive orientation after 00:00 UTC on April 25. Mild solar wind enhancements are likely due to a positive coronal hole high-speed stream on April 25, with further increases possible from the glancing influence of a CME on April 25–26.

The geomagnetic field was quiet to unsettled over the past 24 hours. Mostly quiet to unsettled geomagnetic conditions are expected for most of April 25, with isolated G1 – Minor to G2 – Moderate geomagnetic storms possible late on April 25 into early April 26 due to the arrival of glancing CMEs. Quiet to unsettled conditions are anticipated on April 27 as CME and high-speed stream effects diminish.