Moderate M1.2 solar flare erupts at 13:18 UTC on October 13, 2025

A moderate M1.2 solar flare erupted at 13:18 UTC on October 13, 2025.

Today’s flares include an M1.9 event from region 4246 that began at 04:59 UTC, peaked at 05:26 UTC, and ended at 05:45 UTC, and an M2.7 event from region 4246 that began at 08:55 UTC, peaked at 09:19 UTC, and ended at 09:31 UTC. Several C-class flares were also recorded, primarily from regions 4246 and 4248.

In 24 hours to 12:30 UTC on October 13, solar activity reached moderate levels, with two isolated M-class flares. Multiple C-class flares were also observed from growing active regions. Other active regions displayed either decay or stability with alpha or beta magnetic classification.

Solar activity is likely to continue at low levels, with a chance for R1 – Minor to R2 – Moderate radio blackout levels, associated with potential M-class flare occurrence, expected through October 15.

Active sunspot regions presently observed on the Earth-facing solar disk include AR 4245 (S10W02 – Beta), AR 4246 (N24W16 – Beta-Gamma), AR 4247 (S12W52 – Beta), AR 4248 (N06E15 – Beta-Gamma), AR 4250 (N06E20 – Beta), AR 4251 (N19E40 – Alpha), AR 4252 (S13E66 – Alpha), and AR 4253 (S17W10 – Beta).

Over the past 24 hours, the greater than 2 MeV electron flux reached high levels, peaking at 1 710 pfu. The greater than 10 MeV proton flux remained at background levels. High electron flux is forecast to persist on October 13–15, while proton levels should remain low.

Recent solar wind conditions showed continued effects from a negative polarity coronal hole high speed stream. The interplanetary magnetic field peaked at 9 nT, with the Bz component occasionally reaching -7 nT. Solar wind speed gradually decreased from around 800 km/s to below 700 km/s. Enhanced solar wind conditions are expected through October 14 due to ongoing coronal hole influences, with a minor CME-related enhancement possible on October 15.

The geomagnetic field reached G1 – Minor storming levels during three periods in the past 24 hours. Geomagnetic activity is expected to range from active to G1 – Minor storming until October 13, reverting to unsettled on October 14 as coronal hole influences wane, and returning to unsettled to active on October 15 with a possible minor enhancement from a passing CME.