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The Sun's catwalk

Never a dull moment with the Sun: impressive prominence eruptions and powerful solar flares took turns to give an impressive show of solar activity.

What is a CoSEE-Cat?

CoSEE-Cat is not an animal lounging on your couch but what is it then?

A Blizzard of Solar Campfires

STCE researchers used a sophisticated wavelet-based algorithm to automatically detect and characterize thousands of transient EUV brightenings, often called campfires, in the HRIEUV data obtained at the closest-perihelion of Solar Orbiter.

ESWW Early-bird registration deadline coming up

The early-bird registration is closing soon: deadline September 5.
If you have not yet submitted an abstract, you can still apply for a poster: deadline September 5.

The flary adventures of NOAA 4168

NOAA 4168 (SIDC sunspot group 588) was one of the larger and more flare-active regions during the last few weeks. It produced no less than 17 M-class ("medium") flares, with a few quite spectacular.

SWx acronyms

The STCE's list of space weather acronyms has been expanded by over 400 entries. Take a look!

Prominences rise to glory

Two very nice prominence eruptions were observed on 14 and 15 July. The associated CMEs were not earth-directed.

The Bastille Day event

Twenty-five years ago, one of the most powerful solar storms of SC23 rocked geospace and affected a whole series of technologies.

Hurray for the prominence eruptions!

Some impressive prominences erupted last week. None of the associated CMEs is directed to Earth. 

Superactive regions

Superactive regions represent less than 0.5% of all active regions during a solar cycle, yet they are the source of 30-45% of all X-class flares.

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