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
Auroral activity is expected to remain at background levels initially. However, the arrival of the CH73 high-speed stream late on 08 July or during 09 July may lead to an enhancement of the auroral oval. As a result, aurora may become visible from northern Scotland and similar geomagnetic latitudes, although observations are likely to be limited by short hours of darkness and cloud cover.
Southern Hemisphere
Auroral activity is expected to remain at background levels initially. However, the arrival of the CH73 high-speed stream late on 08 July or during 09 July (UTC) may enhance the auroral oval. As a result, aurora may become visible across southern New Zealand and similar geomagnetic latitudes.
Issued at: 02:44 (GMT) on Wed 8 Jul 2026
Forecast overview
Space Weather Forecast Headline:
Chance of Moderate solar activity. Chance of G1 Day 2-3 (09-10 Jul). Decreasing slight chance of S1/Minor radiation storms.
Analysis of Space Weather Activity over past 24 hours
Solar Activity: Solar activity has been Moderate over the past 24 hours, with a single, impulsive Moderate flare observed from a large and complex region in the southeast quadrant.
There are five sunspot regions visible on the solar disc. The largest and most magnetically complex region is located in the southeast. It is dominated by a large leading spot, followed by two smaller trailing spots, the rearmost of which may exhibit a delta configuration. The remaining regions are relatively small and magnetically simple. However, the region near the south-central disc has recently developed numerous small spots, some of which are beginning to develop rudimentary penumbrae.
A CME was observed in association with the Moderate flare recently observed. Satellite imagery is currently unavailable for further analysis; however, the event is not expected to be Earth-directed based on the available observations.
Solar Wind / Geomagnetic Activity: Solar winds indicated a return to slow conditions. Solar wind speeds were mostly at the bottom end of Slightly Elevated levels (400-450 km/s), on a slight declining trend. The number of particles the solar wind is made of was below Average. Total Interplanetary Magnetic Field was weak, and so was the important North-South component. Geomagnetic activity was Quiet (Kp 0-2).
Energetic Particles / Solar Radiation: The count rate of energetic particles (high energy protons) was near background levels.
Four-Day Space Weather Forecast Summary
Solar Activity: Low to Moderate activity is expected to continue with a chance of further M-class flares, most likely from AR4482.
Solar Wind / Geomagnetic Activity: No Earth-directed CMEs feature in the forecast period. The only significant feature during the forecast period is CH73/-. This recurrent coronal hole is expected to connect with Earth by around Day 2 (09 July), perhaps with an early connection possible late Day 1 (08 Jul), with speeds up to 600 km/s.
Geomagnetic activity is expected to remain mostly Quiet to Unsettled (Kp 0–3) Day 1 (08 July). Activity is then expected to increase on Day 3 (09 July), becoming Unsettled to Active, with a chance of G1 (Minor) geomagnetic storm intervals, before activity begins to decline again through Day 3 & 4 (10-11 July).
Energetic Particles / Solar Radiation: The count rate of energetic particles (high energy protons) remained below the S1/Minor radiation storm level. There is a slight chance of proton flux exceeding the S1 (Minor) radiation storm threshold due to the presence of large regions near the western limb, the risk declining progressively.
Issued at: 00:09 (GMT) on Wed 8 Jul 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: