Major X1.1 solar flare erupts from Region 4098

There were no radio signatures that would suggest a coronal mass ejection (CME) was produced.

However, a 10cm Radio Burst (TenFlare) lasting 1 minute and with a peak flux of 170 sfu was detected between 01:49 and 01:50 UTC. This indicates that the electromagnetic burst associated with a solar flare at the 10cm wavelength was double or greater than the initial 10cm radio background.

This can be indicative of significant radio noise in association with a solar flare. This noise is generally short-lived but can cause interference for sensitive receivers, including radar, GPS, and satellite communications.

Radio signatures were forecast to be most degraded over the West Pacific Ocean and parts of East Asia at the time of the flare.

In 24 hours to 00:30 UTC on May 25, solar activity reached moderate levels, with region 4089 producing an M2.1 flare at 20:23 UTC on May 24. Region 4089 exhibited minor growth, 4097 was in decay while all other regions remained stable and quiet.

No Earth-directed CMEs were detected in available imagery.

The greater than 2 MeV electron flux reached high levels with a peak flux of 1 270 pfu observed at 16:30 UTC, while the greater than 10 MeV proton flux was steady at background levels.

The solar wind environment was mildly enhanced in response to positive polarity coronal hole high speed stream (CH HSS) influences. Total IMF strength reached 10 nT, and the Bz component varied between +5/-6 nT. Solar wind speeds decreased from initial values near 450 km/s to around 400 km/s by 00:30 UTC today. The phi angle was positive throughout the period.

There are currently 8 numbered active regions on the Earth-side of the Sun.

Solar activity is expected to be low, with a chance for minor to moderate events from May 25 to 27, according to the Space Weather Prediction Center.

The geomagnetic field is expected to be at quiet to unsettled levels, with a chance for active conditions, from May 25 to 27 due to positive polarity CH HSS.