Moderate M1.2 solar flare erupts at 10:05 UTC on June 2, 2026

A moderate M1.2 solar flare erupted at 10:05 UTC on June 2, 2026.

Today’s flares include a C-class event that began at 00:15 UTC and ended at 00:16 UTC, and a radio burst recorded at 00:38 UTC. No M-class or X-class flare events have been reported in the current data.

In 24 hours to 00:30 UTC on June 2, solar activity remained at low levels with isolated low-level C-class flaring observed. The strongest event of the period was a C1.5 flare at 17:24 UTC on June 1.

Solar activity is expected to remain at low levels through June 4, with a chance for isolated M-class flares (R1 – Minor to R2 – Moderate). Flaring potential is balanced, with some active regions remaining complex or rotating into view.

Active sunspot regions presently observed on the Earth-facing solar disk include AR 4444 (S22W73 – Alpha), AR 4446 (S15W48 – Beta), AR 4447 (S17W82 – Alpha), AR 4449 (S09W43 – Beta), AR 4452 (N10W89 – Beta), AR 4454 (S15W07 – Alpha), AR 4455 (N15E11 – Beta), AR 4457 (S09W27 – Beta), AR 4458 (S04E20 – Beta), and AR 4459 (N14E63 – Beta).

Over the past 24 hours, the greater than 2 MeV electron flux at geosynchronous orbit was at low to moderate levels, with a peak flux of 551 pfu. The greater than 10 MeV proton flux remained at background levels. These particle flux levels are expected to remain at low to moderate values through June 4.

During the past 24 hours, solar wind parameters reflected background conditions with total magnetic field steady around 4 nT and solar wind speeds gradually decreasing from 450 to 400 km/s. A minor enhancement occurred around 12:30 UTC, with Bt peaking at 7 nT and Bz deflecting southward to -6 nT. Solar wind properties are anticipated to further decline toward nominal conditions through June 2, with possible enhancements early to midday on June 3.

Geomagnetic field activity was mostly quiet early in the period, becoming unsettled after the arrival of a slow-moving transient. Mostly quiet conditions, with isolated unsettled periods, are expected for June 2. There is a chance for isolated periods of G1 – Minor geomagnetic storming over June 3–4 due to the influence of a recent CME, a preceding co-rotating interaction region, and a positive polarity coronal hole high-speed stream.