Space Weather

Space weather describes changing environmental conditions in near-Earth space. Magnetic fields, radiation, particles and matter, which have been ejected from the Sun, can interact with the Earth’s upper atmosphere and surrounding magnetic field to produce a  variety of effects.

Image courtesy of NASA/SDO and the AIA, EVE, and HMI science teams

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Aurora forecasts

Northern Hemisphere

The auroral oval is expected to be at background levels at first, with some minor high latitude enhancements possible, mainly on Wednesday and Thursday (UTC). Short hours of darkness will limit any viewings, however.

Southern Hemisphere

The auroral oval is expected to be at background levels at first, with some minor high latitude enhancements possible, mainly on Wednesday and Thursday (UTC).

Issued at: 02:33 (GMT) on Thu 28 May 2026

Forecast overview

Space Weather Forecast Headline: Chance of Moderate-class X-ray flares. 

Analysis of Space Weather Activity over past 24 hours

Solar Activity: Solar activity has been Low with only Common-class flares observed in the past 24 hours.

There are currently eleven sunspot regions on the visible disc. Of most interest are two clusters of spot regions, one cluster is in the southeast. All these regions appear to be magnetically simple. The central region is stable, the northeast region is seeing decline in their trailing spots and the southwest region is seeing some waxing and waning of its trailing spots to the south of the main leading spot. The second cluster is located in the southwest quadrant of the disc, both showing signs of decay in their trailing spots. Two regions in the northwest, are seeing some development. The remaining spot regions are small and simple. 

No Earth directed CMEs were observed in the past 24 hours. 

Solar Wind / Geomagnetic Activity: Solar winds showed either some weak coronal hole or CME influence. Wind speeds varied between 360 to 440km/s, with a steady declining trend towards the current background levels. The Interplanetary Magnetic Field was Weak to Moderate. The north-south component varied weakly. Geomagnetic activity was Quiet (Kp 2).

Energetic Particles / Solar Radiation: Solar radiation levels have returned to background levels after a recent solar radiation storm from a far-sided eruption. 

Four-Day Space Weather Forecast Summary

Solar Activity: There is an increasing chance of isolated M-class flares, initially most likely from the various spots in the southeast disc, but with an increasing component from far side region(s) currently rotating onto the east limb.

Solar Wind / Geomagnetic Activity: No Earth-directed CMEs currently feature in the forecast. The solar wind is currently experiencing minor disturbance, due to either weak CME influence or weak coronal hole fast wind. A small coronal hole in the southern hemisphere is expected to provide minor enhancements in the coming days, with wind speeds perhaps reaching up to 500 km/s, although this is low confidence. 

Geomagnetic activity is expected to be mostly Quiet to Unsettled, with a slight chance of Active or G1/Minor Storm interval, due to any weak fast wind influence, although this aspect of the forecast is low confidence. 

Energetic Particles / Solar Radiation: Solar radiation levels are declining after a recent brief enhancement due to a far side eruption. Radiation levels are most likely to remain at background levels for the rest of this period.

Issued at: 00:12 (GMT) on Thu 28 May 2026

Solar imagery

SDO AIA-193

This channel highlights the outer atmosphere of the Sun - called the corona - as well as hot flare plasma. Hot active regions, solar flares, and coronal mass ejections will appear bright here. The dark areas - called coronal holes - are places where very little radiation is emitted, yet are the main source of solar wind particles.

Issued at:

SDO AIA-304

This channel is especially good at showing areas where cooler dense plumes of plasma (filaments and prominences) are located above the visible surface of the Sun. Many of these features either can't be seen or appear as dark lines in the other channels. The bright areas show places where the plasma has a high density.

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