Strong M7.4 solar flare erupts at 11:19 UTC on November 5, 2025

A strong M7.4 solar flare erupted at 11:19 UTC on November 5, 2025.

This M7.4 flare began at 10:36 UTC and ended at 11:43 UTC, originating from region 4274. Today’s flares include an M7.4 event from region 4274 peaking at 11:19 UTC, along with several C-class flares from regions 4273, 4274, and 4275.

In 24 hours to 00:30 UTC on November 5, solar activity reached very high levels, primarily driven by an X1.8 flare from region 4274 and an X1.1 flare from beyond the east-southeast limb. The majority of recent activity was produced by region 4274.

There is a 65% chance for R1 – Minor to R2 – Moderate radio blackouts and a 15% chance for R3 – Strong radio blackouts, reflecting the ongoing activity and complex magnetic structure of region 4274.

Active sunspot regions presently observed on the Earth-facing solar disk include AR 4272 (N22E36 – Beta), AR 4273 (S12W01 – Beta-Gamma), AR 4274 (N24E53 – Beta-Gamma-Delta), and AR 4275 (N07E61 – Beta-Gamma).

Over the past 24 hours, the greater than 2 MeV electron flux continued above 1 000 pfu during daily peaks, though the trend is decreasing as Earth moves out of the geoeffective sector linked to a coronal hole high speed stream. The greater than 10 MeV proton flux remained at background levels. Electron levels are predicted to decline through November 6 before rising again on November 7 as the next high speed stream becomes geoeffective. Protons may increase slightly following the recent X-class flare but are projected to remain below threshold.

Solar wind parameters have reflected weakening influences from a high speed stream, with the interplanetary magnetic field measured at 6–8 nT and solar wind speeds decreasing from 450 km/s to 400 km/s. Parameters are expected to reach nominal levels through November 6. Enhancement is forecast for November 6–7 as a new high speed stream and the trailing portions of three recent CMEs may interact, producing stronger solar wind conditions.

The geomagnetic field has been at quiet to unsettled levels as the high speed stream effect wanes. This state is expected to persist into November 6, before late November 6 into November 7 may see G1 – Minor geomagnetic storming with a slight chance for G2 – Moderate conditions as a result of high speed stream and CME interactions.