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.
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Aurora forecasts
Northern Hemisphere
The auroral oval is likely to be subdued through to midweek, but with an increasing chance of some limited high geomagnetic latitude enhancements possible to end the UTC working week - a combination of a possible weak glancing CME and a strengthening solar wind.
Southern Hemisphere
The auroral oval is likely to be subdued through to midweek, but with an increasing chance of some limited high geomagnetic latitude enhancements possible to end the UTC working week - a combination of a possible weak glancing CME and a strengthening solar wind.
Issued at: 01:04 (GMT) on Tue 3 Nov 2026
Forecast overview
Space Weather Forecast Headline: Slight chance of Minor geomagnetic storm G1 on 05 and 06 November (UTC days).
Analysis of Space Weather Activity over past 24 hours
Solar Activity: Activity has been very low, with no significant flare activity observed.
There are three sunspot regions on the facing side of the Sun. Changes observed in the period were minor, with the most complex region in the southeast showing a new trailing spot developing in the period, while the leading minor spots became mobile.
No Coronal Mass Ejections (CMEs) were visible in available satellite imagery.
Solar Wind / Geomagnetic Activity: Solar winds showed a declining fast wind - the solar wind speed fell from a slightly elevated peak to reach background by the period's end. The number of particles in the solar wind was below average, while the associated magnetic field was weak, with a variable north-south component.
The net result of the above solar wind measures was provisionally quiet geomagnetic activity throughout.
Energetic Particles / Solar Radiation: No solar radiation storms were observed.
Four-Day Space Weather Forecast Summary
Solar Activity: Low activity is expected, however there is a gradually rising slight chance of Moderate-class x-ray flares as a result of changes on the current population of sunspot regions and the possible staged return of past active regions over the eastern solar horizon later in the UTC week.
Solar Wind / Geomagnetic Activity: While most likely a miss, a CME from 01/1500UTC may glance Earth on Thursday 05 November. This is the only transient in the forecast, with otherwise comprises up to three sources of fast wind. Of these, only the final one due around the end of the current UTC working week carries any realistic prospect of breaching G1 minor geomagnetic storm, perhaps extending the slight chance of G1 to more fully cover the final two days of the period.
Energetic Particles / Solar Radiation: No solar radition storms are likely, with few suitably complex sunspot regions and none of these in the more prone western solar hemisphere.
Issued at: 00:10 (GMT) on Tue 3 Nov 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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