Moderate M3.9 solar flare erupts at 06:23 UTC on March 26, 2026

A moderate M3.9 solar flare erupted at 06:23 UTC on March 26, 2026.

Today’s flare activity includes a C1.8 solar flare that began at 05:46 UTC, peaked at 05:55 UTC, and ended at 06:09 UTC. No M-class or X-class flares were recorded in the available event data for March 26, 2026.

In 24 hours to 00:30 UTC on March 26, solar activity was at low levels with seven numbered active regions visible on the disk. The largest event in this period was a C3.7 flare at 00:30 UTC on March 25. Other regions showed varying levels of evolution and spot decay. No Earth-directed coronal mass ejections (CMEs) were observed in available coronagraph images.

Solar activity is expected to be low with a chance for M-class (R1 – Minor to R2 – Moderate) flares through March 28.

No active sunspot region summary is provided in the current data input.

Over the past 24 hours, the greater than 2 MeV electron flux at geosynchronous orbit reached high levels, peaking at 8 451 pfu at 15:40 UTC on March 25. The greater than 10 MeV proton flux remained at background levels. The electron flux is expected to continue at high levels through March 28, while proton flux is expected to persist at background values.

In the past 24 hours, solar wind parameters reflected the waning influence of a negative polarity coronal hole high-speed stream. Solar wind speed decreased from about 550 km/s to 515 km/s, with the total magnetic field averaging near 4 nT. At 05:52 UTC on March 25, a transient CME began affecting the near-Earth environment with an increase in magnetic field strength to 10 nT and solar wind speed peaking at 633 km/s. Additional solar wind enhancements are expected following another CME component arrival on March 26; gradual return to nominal, slow-speed solar wind conditions is forecast through March 28.

During the past 24 hours, the geomagnetic field reached G1 – Minor storming levels in the early part of the period, then returned to mostly quiet levels. The geomagnetic field is expected to reach unsettled to active levels with isolated G1 – Minor storm periods possible on March 26. Conditions should decrease to unsettled levels on March 27, and a return to quiet levels is expected by March 28.