Moderate M1.5 solar flare erupts at 07:35 UTC on July 1, 2026

A moderate M1.5 solar flare erupted at 07:35 UTC on July 1, 2026.

Today’s flares include a C-class event observed starting at 00:00 UTC, a radio burst at 02:31 UTC, and a flare from region 4479 that began at 03:59 UTC, peaked at 04:02 UTC, and ended at 04:14 UTC. No X-class or other M-class flares are confirmed in the provided event summary for July 1, 2026.

In 24 hours to 00:30 UTC on July 1, solar activity reached high levels, driven by an X1.1 flare at 20:50 UTC on June 30, and included an M5.8 flare at 12:57 UTC and a C9.1 flare at 19:58 UTC, both on June 30. Multiple regions exhibited growth with several small delta configurations observed.

Solar activity is likely to reach moderate levels with a slight chance for X-class flares due to the ongoing potential from active regions 4475, 4478, and 4479.

Active sunspot regions presently observed on the Earth-facing solar disk include AR 4475 (S09W63 – Beta), AR 4477 (S14W31 – Beta), AR 4478 (S05W06 – Beta-Gamma-Delta), AR 4479 (N16W24 – Beta-Gamma-Delta), and AR 4480 (S18W30 – Beta).

Over the past 24 hours, the greater than 2 MeV electron flux was at moderate to high levels, peaking at 5 687 pfu. The greater than 10 MeV proton flux remained at background levels. The greater than 2 MeV electron flux is expected to again reach high levels on July 1 and July 3. There is a slight chance for a greater than 10 MeV proton event (S1 – Minor).

Solar wind parameters were at nominal levels until an interplanetary shock was observed at 11:02 UTC on June 30. Solar wind speed increased from about 330 km/s to 430 km/s. The total magnetic field reached up to 16 nT, with Bz southward deflections reaching -11 nT. Enhanced solar wind conditions are expected to persist on July 1, with further enhancements possible late on July 1 or early July 2. A return to nominal conditions is anticipated by July 3 pending CME analysis.

The geomagnetic field was initially quiet but became unsettled to G1 – Minor conditions following CME influences during the latter half of the UTC day. G1 – Minor storming is likely, with isolated periods of G2 – Moderate conditions possible into early July 1. Activity should decrease to unsettled and active on July 2, with a likely return to mostly quiet conditions by July 3.