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

Space weather notifications

There are currently no active notifications.

Aurora forecasts

Northern Hemisphere

There is a chance of some visible aurora at high latitudes on the 31st, due to the arrival of a weak CME. Otherwise the aurora is expected to remain at backgrounds for much of the period.

Southern Hemisphere

There is a chance of some visible aurora at high latitudes on the 31st, due to the arrival of a weak CME. Otherwise the aurora is expected to remain at backgrounds for much of the period.

Issued at:

Forecast overview

Space Weather Forecast Headline: No significant space weather is expected.

Analysis of Space Weather Activity over past 24 hours

Solar Activity:  Solar activity was very low, with two active regions visible. These are both simplifying and weakening as they approach the western limb of the Sun. No Earth-directed coronal mass ejections (CMEs) were observed in imagery.

Solar Wind / Geomagnetic Activity: The solar wind was at background to slightly elevated levels 370-430 km/s. The total magnetic field strength was broadly weak, and whilst the north-south component was also weak, it did exhibit a rotation from mainly negative values to positive values through the day. This was possible due to a very weak interaction with the expected CME passing Earth. The resultant geomagnetic activity was Quiet (Kp 0 to 2).

Energetic Particles / Solar Radiation: The flux of energetic particles (high energy protons) remained at background levels with no high energy radiation storms observed.

Four-Day Space Weather Forecast Summary

Solar Activity: Solar activity is forecast very low, with the two sunspots on the visible disc both declining or stable, and also soon rotating away from the Earth-facing disc. 

Solar Wind / Geomagnetic Activity: There are no Earth-directed CMEs currently in the interplanetary space between the Sun and Earth. Quiet geomagnetic conditions are expected with a chance of Unsettled spells, and a slight chance of Active intervals on day 1 (31st Nov). 

Energetic Particles / Solar Radiation: The flux of high energy particles (mainly protons) is forecast to remain at background levels with no high energy radiation storms occurring.

Issued at:

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.

Issued at: