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.
Space weather notifications
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Aurora forecasts
Northern Hemisphere
No significant enhancements to the auroral oval are expected during the forecast period.
Southern Hemisphere
No significant enhancements to the auroral oval are expected during the forecast period.
Issued at: 00:41 (GMT) on Wed 2 Sep 2026
Forecast overview
Space Weather Forecast Headline: No Significant Activity
Analysis of Space Weather Activity over past 24 hours
Solar Activity: Low with isolated Common class flares, with the largest from over the northeast limb. There are three small and simple sunspots on the Earth-facing disc. The region in the southwest continues to decline, while the two the northeast are small mature unipolar spots.
No Earth-directed Coronal Mass Ejections (CMEs) were observed in available imagery.
Solar Wind / Geomagnetic Activity: Solar winds were indicative of slow wind conditions. Solar wind speed remained Background to Slightly Elevated, varying between 370km/s and 450km/s. Interplanetary Magnetic Field was Weak with the north-south component also Weak but favouring a negative orientation (southwards). Geomagnetic activity was Quiet (Kp 0-2).
Energetic Particles / Solar Radiation: The count rate of energetic particles (high energy protons) at geostationary orbit was at background. No Solar Radiation Storms were observed.
Four-Day Space Weather Forecast Summary
Solar Activity: Activity is expected to remain Low or Very Low. There is a slight chance of M-class flares, mainly from any new region moving onto the disc from over the northeast limb.
Solar Wind / Geomagnetic Activity: There are no Earth-directed CMEs. Solar winds are expected to continue easing, becoming predominately Background at around 300km/s, with no significant enhancements forecast. Geomagnetic activity is forecast to be mostly Quiet (Kp 0-2) with only a slight chance of Unsettled (Kp3) intervals.
Energetic Particles / Solar Radiation: The count rate of energetic particles (high energy protons) at geostationary orbit is expected to be at Background. No Solar Radiation Storms are forecast.
Issued at: 12:12 (GMT) on Wed 2 Sep 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.
Issued at: