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A new reference solar spectrum

BIRA-IASB announced a new reference solar spectrum based on SOLAR/SOLSPEC observations on board the International Space Station.

Reappearance

A long filament was visible on the Sun last week. It appears to be the remnant of active region NOAA 2673, source of the strongest solar flares so far this solar cycle.

Something's brewing...

Two strong coronal mass ejections emanated from behind the Sun's east limb on 18 October and may herald more active solar conditions in the days ahead.

The best of... 2016!

A compilation of the most memorable space weather moments of 2016 can be found underneath. A ***MOVIE*** was created containing one or more clips of each event.

The Sun is spotless again!

After two months of increased solar activity, the Sun has turned spotless again on 8 October.

A new LYRA product

The PROBA2 team is happy to announce the release of a new data product: the O+N2 Earth atmosphere number densities derived from PROBA2/LYRA occultation data.

Facing the Sun

An artist's impression of ESA's Solar Orbiter in front of a stormy Sun. The spacecraft is currently being prepared for its 2019 launch from Cape Canaveral, USA.

Recurrent Coronal Hole

Earth is currently (28 September) under the influence of a high speed stream from a coronal hole. A strong geomagnetic storm is in progress. Polar lights will not be visible from Belgium.

NOAA 2673's hidden secrets revealed

Some additional and impressive images of the two strongest flares that NOAA 2673 produced.

Earth under attack

September 10, 16:06 UT, another extreme light flash was seen on the solar disk. At the same time, a plasma cloud with an extreme fast speed was ejected. On top of this, a proton storm bombarded Earth. The impact of the proton storm could be measured at the surface of the Earth!

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