X-class flares!

Active region NOAA 3663 produced an X1.6 flare early on 3 May. Further M-class flaring can be expected from this sunspot group, with a chance on another X-class flare. ***UPDATED (2)***

Spot the moss, spicules, and coronal rain

The EUI instrument onboard Solar Orbiter observed the solar corona in exquisite detail once more.

Intense geomagnetic storms during SC25

An overview of the more potent geomagnetic storms that have occurred so far this solar cycle (SC25).

Soar like an eagle

Solar activity has risen dramatically during the last week, with sunspot numbers near their highest levels so far this solar cycle and an average of 2 to 3 M-class flares during almost every day.

Eye pleaser

A spectacular eruption took place on the Sun's farside on 11 April. The associated coronal mass ejection was not earth-directed.

Peek a boo

April 8 2024, the Sun and the Moon did their peek a boo trick. People in North America could see the Moon sliding in front of the Sun catching a glimpse of the solar corona with their own eyes. We were there.

Preparing for the eclipse

Position of Solar Orbiter on 8 April 2024, with Solar Orbiter’s turns around the Sun shown in green
Proba-3 set up in space

On 8 April 2024, a large part of the United States and Mexico will experience a total solar eclipse. Also at the STCE in Belgium, all eyes will be on the Sun. Three satellite instrument teams are preparing for unique, yet complementary, eclipse observations.

NOAA 13615

Active region NOAA 13615 was one of the larger sunspot groups so far this solar cycle. During its transit, it produced 1 X-class flare and 43 M-class flares, the latter is an exceptionally high number.

NOAA 3615 finally did it!

NOAA 3615 produced its first X-class flare late on 28 March. ***UPDATE: The associated CME has no earth-directed component.***


A long-duration X1 flare was associated with the strongest proton event so far this solar cycle, as well as with an earth-directed full halo CME. UPDATE: The ICME arrived shortly after noon on 24 March, sparking a severe geomagnetic storm.



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