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 G1/Minor Storm on Days 3-4 (05-06 Nov).
Analysis of Space Weather Activity over past 24 hours
Solar Activity: Solar activity has been Very Low. There are now four sunspot regions on the visible disc. The largest and most magnetically complex region on the disc is still close enough to the limb to make assessment of its structure a little difficult, however it has recently increased in size and complexity. The remaining three regions are all small and simple.
No Coronal Mass Ejections (CMEs) were visible in available coronagraph imagery.
Solar Wind / Geomagnetic Activity: Solar winds showed a declining fast wind. The wind speed was initially slightly elevated between 400-450 km/s, easing gradually, and is now slow between 370-400 km/s. The Interplanetary Magnetic Field was weak, while the north-south component varied weakly. Geomagnetic activity was Quiet (Kp 0-2) throughout.
Energetic Particles / Solar Radiation: No solar radiation storms were observed.
Four-Day Space Weather Forecast Summary
Solar Activity: Very Low or Low activity is likely to continue, although there is a rising slight chance of M-class flaring, mainly from the more complex region in the southeast of the disc.
Solar Wind / Geomagnetic Activity: A CME which left the Sun on 01 Nov is a most likely miss, but may glance Earth during Day 3 (05 Nov). Otherwise, the current coronal hole fast wind has now waned with solar winds having returned to slow speeds. Some minor fast wind influence is possible during Day 3 (05 Nov), perhaps coinciding with any minor CME influence. Another coronal hole fast wind should then arrive during Day 4 (06 Nov).
Geomagnetic activity is expected to be Quiet at first, perhaps becoming Unsettled to Active with a slight chance of G1/Minor Storms on Days 3-4, from any minor CME and CH09 influence.
Energetic Particles / Solar Radiation: No solar radiation storms are expected.
Issued at: 12:47 (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.
Issued at: