Space Weather

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.

Image courtesy of NASA/SDO and the AIA, EVE, and HMI science teams

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Aurora forecasts

Northern Hemisphere

The auroral oval is expected to be weak on 19th Nov. However a coronal hole high speed stream is expected to bring enhancements on 20 and 21 Nov, with chance of minor geomagnetic storms, and aurora sightings over the far north of Scotland.

Southern Hemisphere

The auroral oval is expected to be weak on 19th Nov. However a coronal hole high speed stream is expected to bring enhancements on 20 and 21 Nov, with chance of minor geomagnetic storms, and aurora sightings at high latitudes.

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Forecast overview

Space Weather Forecast Headline: Minor Geomagnetic Storms possible 20th & 21st Nov. 

Analysis of Space Weather Activity over past 24 hours

Solar Activity: Solar activity was very low, with currently no sunspot regions on the sun's visible side. No Earth-directed coronal mass ejections were observed. 

Solar Wind / Geomagnetic Activity: The solar wind was at slow levels around 350-370 km/s. Its magnetic field was weak, with no significant deflections in the important north-south direction. Resultant geomagnetic activity was Quiet.

Energetic Particles / Solar Radiation: Energetic particles were at background levels, with no solar radiation storms observed.

Four Day Space Weather Forecast Summary

Solar Activity: Solar activity is forecast to be very low through this forecast period, with currently no sunspots on the sun's visible side, and none expected to move into view. 

Solar Wind / Geomagnetic Activity: The solar wind is expected to remain at slow levels on day 1 (19th), then become slightly elevated, perhaps elevated, from later on day 2 (20th) under coronal hole high speed stream influences. Quiet to Unsettled geomagnetic activity is expected to increase from day 2 with Active spells likely, and Minor Storm intervals possible on days 2 and 3 (20th & 21st). Mainly Unsettled conditions then likely on day 4 (22nd). 

Energetic Particles / Solar Radiation: No solar radiation storms are expected, with energetic particles forecast to remain at background levels.

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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.

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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