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
Geomagnetic activity is expected to be predominantly at background, resulting in only limited opportunities for visible aurora. While a slight enhancement is possible late 22 Jun (UTC) and into 23 Jun, this is not expected to increase any potential viewing. This will be further constrained by the short hours of darkness at this time of year at suitable viewing latitudes.
Southern Hemisphere
Geomagnetic activity is expected to remain largely at background levels, with auroral visibility likely to be limited and largely confined to the Antarctic continent. While a slight enhancement is possible late 22 Jun (UTC) and into 23 Jun, this is not expected to significantly increase any potential viewing.
Issued at: 14:09 (GMT) on Sun 21 Jun 2026
Forecast overview
Space Weather Forecast Headline: Low to Moderate Solar activity
Analysis of Space Weather Activity over past 24 hours
Solar Activity: Solar activity has become Moderate following the emergence of three active regions near the southeast limb. There are currently seven sunspot regions visible on the Earth-facing side of the Sun, including several very small regions that are barely visible. The main focus remains on the eastern side, where new sunspot development is occurring, including areas showing signs of increasing magnetic activity.
No Earth-directed Coronal Mass Ejections (CMEs) have been observed in available imagery.
Solar Wind / Geomagnetic Activity: Slow wind parameters were indicative of a slow regime. Solar wind speeds were at Background, mainly 360-400 km/s. Interplanetary Magnetic Field, was Weak with the important north-south component also Weak and variable in direction. Geomagnetic activity was Quiet (Kp1-2).
Energetic Particles / Solar Radiation: The count rate of energetic particles (high energy protons) was at Background with no solar radiation storms observed.
Four-Day Space Weather Forecast Summary
Solar Activity: Low to Moderate activity is expected with a chance of further M-class flares, mainly from the regions in the southeast disc.
Solar Wind / Geomagnetic Activity: No significant Earth-directed CMEs are expected, with only a minor glance possible from the 19 June southeast disc CME later on day 2 and into day 3 (22-23 Jun). Otherwise mainly slow wind conditions are expected until day 4 (24 Jun), when the next coronal hole fast wind enhancement may occur, although this is low confidence. Geomagnetic activity is expected to remain mainly Quiet, with a possible spell of Unsettled to Active conditions if a glancing CME influence or fast solar wind enhancement occurs.
Energetic Particles / Solar Radiation: The count rate of energetic particles (high energy protons) is expected to be at Background with no solar radiation storms occurring.
Issued at: 11:05 (GMT) on Sun 21 Jun 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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