Moderate M1.9 solar flare erupts at 17:00 UTC on July 30, 2026

A moderate M1.9 solar flare erupted at 17:00 UTC on July 30, 2026.

Today’s flare reports include no edited solar flare events for July 31, 2026.

In 24 hours to 00:30 UTC on July 31, solar activity reached moderate levels with a long-duration M1.9 flare at 17:00 UTC on July 30, accompanied by an approximately eight-degree-long filament eruption and multiple radio signatures, including Type II and IV sweeps and a radio burst.

Solar activity is expected to be low with a chance for M-class flares (R1-R2, Minor-Moderate) through August 2, 2026.

Active sunspot regions presently observed on the Earth-facing solar disk include AR 4492 (N16W74 – Alpha), AR 4494 (S04W55 – Alpha), AR 4495 (S03W69 – Alpha), AR 4496 (N05W23 – Alpha), AR 4498 (N14E37 – Beta-Gamma), AR 4499 (N04E05 – Beta-Gamma-Delta), AR 4500 (N18E44 – Beta), and AR 4501 (S08E03 – Beta).

Over the past 24 hours, the greater than 2 MeV electron flux was at normal to moderate levels. The greater than 10 MeV proton flux reached S1 – Minor storm levels, and the greater than 100 MeV proton flux exceeded 1 pfu. Both proton fluxes are expected to remain at or above alert thresholds through early July 31, with a return to background levels by August 1-2.

Solar wind parameters remained at nominal levels, with the total field averaging near 3 nT and the Bz component between +/-4 nT. Solar wind speed declined toward 310 km/s. There is a decreasing chance for disturbed solar wind conditions on July 31 due to previous CMEs, with additional disturbance possible on August 1 and potential further enhancements on August 2 if the July 30 CME has a favorable trajectory towards Earth.

The geomagnetic field was quiet over the past 24 hours. Quiet to unsettled conditions with isolated active periods are possible on July 31 and through August 1 due to weak coronal hole high-speed stream influences and previous CMEs. An increase in storm levels is possible on August 2 if the July 30 partial halo CME is Earth-directed.