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

Ovation Model for the northern hemisphere: The auroral oval is expected to remain weak and close to background levels, with auroral sightings considered unlikely over the next few days.

Southern Hemisphere

Ovation Model for the southern hemisphere: The auroral oval is expected to remain weak and close to background levels, with auroral sightings considered unlikely over the next few days.

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Forecast overview

Space Weather Forecast Headline: No significant activity expected.

Analysis of Space Weather Activity over past 24 hours

Solar Activity: Solar activity has been very low over the past 24 hours, with no significant X-ray flares and no sunspot regions on the facing side of the sun. No Earth-directed Coronal Mass Ejections (CMEs) have been observed in available satellite imagery, and there are thought to be none en route.

Solar Wind / Geomagnetic Activity: The solar wind speed has remained in a slow regime, on a level trend. The number of particles making up the solar wind saw a slight rise over the same period, before moderating slightly later in the UTC morning, and in any case remaining near background throughout. The magnetic field associated with these particles was small in magnitude and stable in behaviour throughout. None of the preceding measures had a great impact on geomagnetism, with this peaking at the bottom end of the measurement scale, and well below Minor Storm levels.

Energetic Particles / Solar Radiation: No solar radiation storms were observed.

Four-Day Space Weather Forecast Summary  

Solar Activity: Solar activity is forecast to remain very low throughout, with no sunspot regions on the Earth-facing side of the sun, and none expected to rotate on in the four-day period.

Solar Wind / Geomagnetic Activity: No CMEs feature in this forecast. With no significant periodic increases in the solar wind forecast (due to 'coronal holes'), geomagnetic activity is forecast to remain mostly quiet, as at present.

Energetic Particles / Solar Radiation: No solar radiation storms are expected in the period.

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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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