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 in the coming days.
Southern Hemisphere
No significant enhancements to the auroral oval are expected in the coming days.
Issued at: 01:18 (GMT) on Mon 26 Oct 2026
Forecast overview
Space Weather Forecast Headline: No significant space weather expected.
Analysis of Space Weather Activity over past 24 hours
Solar Activity: Low with limited and limited Common class flare activity. There are two regions on the disc, with one simple region in the southwestern quadrant and a simple, but developing region on the southeastern quadrant.
No Earth-directed Coronal Mass Ejections (CMEs) were observed in available imagery.
Solar Wind / Geomagnetic Activity: Solar winds were background, on a declining trend. Density was below average. Interplanetary Magnetic Field, Bt, was weak. The north-south component of the interplanetary magnetic field Bz, also varied weakly. Geomagnetic activity was Quiet (Kp 0-2).
Energetic Particles / Solar Radiation: No solar radiation storms were observed with the count rate of energetic particles persisting at background levels.
Four-Day Space Weather Forecast Summary
Solar Activity: Low or Very Low activity is expected during the four-day forecast period, with a slight chance of increasing to Moderate levels.
Solar Wind / Geomagnetic Activity: A coronal mass ejection from 21 Oct may still yet give a glancing blow on Day 1 (26 Oct), though confidence is low. Currently solar winds are slow. A minor enhancement to Slightly Elevated levels is possible on Day 1 (26 Oct) due to possible fast winds from a small coronal hole in the western disc, otherwise slow solar winds should predominate throughout much of the forecast period, with a possible increase towards the end of Day 4 (29 Oct).
Geomagnetic activity is expected to be Quiet (Kp 0-2) at first, then possibly becoming Unsettled to Active (Kp 3-4) later on Day 1 (26 Oct), given the potential for CME coronal hole fast wind onset effects. On Days 2 and 3 (27 and 28 Oct) geomagnetic conditions are expected to be predominantly Quiet (Kp 0-2), with a possible increase to Unsettled or Active at the end of Day 4 (29 Oct)
Energetic Particles / Solar Radiation: No solar radiation storms are forecast with the count rate of energetic particles expected to persist at Background levels.
Issued at: 13:22 (GMT) on Mon 26 Oct 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: