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

Space weather notifications

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Aurora forecasts

Northern Hemisphere

No significant enhancements to the auroral oval are expected in the period.

Southern Hemisphere

No significant enhancements to the auroral oval are expected in the period.

Issued at: 08:59 (GMT) on Sun 24 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 is currently Low with only Common class flares observed in the past 24 hours. 

There are currently up to seven sunspot regions on the visible disc. The largest region is a bipolar region located near the southeast limb. The lead spot is large and asymmetric, with two moderate sized spots trailing behind and to the north. Further spot emergence is still possible as this region rotates further into view. A bipolar region approaching the northwest limb has shown decay in its intermediate and trailing spots, although is becoming more difficult to assess due to viewing angle. An unnumbered bipolar region in the southeast has exhibited some further overall growth and spot emergence in its intermediate portion. The remaining spots are smaller and simple, and either stable or in slight decay.

There were multiple coronal mass ejections observed leaving the northeast and northwest limbs, though none of them to appear to have a Earth-directed component.

Solar Wind / Geomagnetic Activity: Solar winds showed a slow regime in the period with speeds at background levels. The Interplanetary Magnetic Field was Weak, as was the north-south component. Geomagnetic activity was Quiet (Kp 0-1).

Energetic Particles / Solar Radiation: No solar radiation storms were observed.

Four-Day Space Weather Forecast Summary

Solar Activity: A rising Chance of Moderate class flares, mainly due to returning regions over the eastern limb.

Solar Wind / Geomagnetic Activity: No Earth-directed coronal mass ejections feature in the forecast. Mainly Quiet geomagnetic activity is expected, perhaps with a rising slight chance of Minor Geomagnetic Storm G1 intervals later day 3 or day 4 (26/27 May) should a minor fast solar wind materialise.

Energetic Particles / Solar Radiation: No solar radiation storms are expected.

Issued at: 12:05 (GMT) on Sun 24 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.

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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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