Moderate M1.9 solar flare erupts at 05:26 UTC on October 13, 2025

A moderate M1.9 solar flare erupted at 05:26 UTC on October 13, 2025.

This event began at 05:12 UTC, reached maximum intensity at 05:26 UTC, and ended at 05:39 UTC. The flare originated from region 4248. Other flares today include C6.4, C9.3, C2.3, and C5.8 events from regions 4246 and 4248.

In 24 hours to 00:30 UTC on October 13, solar activity was at low levels. The strongest event of the period was a C9.6 flare. Active regions 4246 and 4248 showed continued development while other spot groups remained mostly stable or in decay.

Solar activity is likely to remain low over the coming days with a chance for R1 – Minor to R2 – Moderate radio blackouts from October 13 to 15.

Active sunspot regions presently observed on the Earth-facing solar disk include AR 4245 (S10W0, 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 continued at high levels, while the greater than 10 MeV proton flux remained at background levels. High levels of electron flux are expected to continue through October 15, with proton fluxes remaining at background.

Solar wind parameters reflected the transition to a high speed stream with total magnetic field peaking at 16 nT before decreasing and solar wind speeds rising to approximately 750 km/s. Enhanced solar wind conditions are anticipated through October 14 due to a negative polarity coronal hole high speed stream, with a minor enhancement possible on October 15 from a CME that departed the Sun on October 11.

The geomagnetic field was at active to G1 – Minor geomagnetic storm levels during the previous 24 hours. Geomagnetic conditions are forecast to remain at active to G1 – Minor storm levels on October 13, become unsettled on October 14, and may be unsettled again on October 15 due to additional CME influence.