X-class flare!

Flare-active sunspot region NOAA 2887 produced an X1 flare on 28 October at 15:35UT. The associated CME is mainly directed to the south, but an earth-directed component is visible in the latest coronagraphic images. UPDATED2!

Tracking SC25

A new STCE webpage aims to track the evolution of a number of important space weather parameters during the current solar cycle 25.

Ode to GOES

16 October 1975 marks the launch of GOES-1, the first of the GOES family. 46 years later, the new generation is still going strong.

From sunspot to geomagnetic storm

The fairly quiet sunspot group NOAA 2882 produced an M-class flare on 9 October. The associated CME was directed to Earth and resulted in a minor geomagnetic storm on 12 October.

The largest solar flare

A powerful X285 solar flare might have taken place in 774-775AD, explaining a curious anomaly of cosmogenic nuclides in tree rings and ice cores.

Three announcements from the Quo Vadis initiative

The Quo Vadis European Space Weather initiative is making the following three announcements.

Sun, Space, STCE, and Sangria!

The STCE will promote its educational and outreach activities at the 4th Symposium on Space Educational Activities in April 2022. Send in your abstract and join us there!

Elegy for a sunspot group

Decaying sunspot region NOAA 2871 managed to produce 2 M-class flares during its transit over the solar disk.

North and South

SILSO scientists have contributed to research extending the hemispheric sunspot number dataseries all the way back into the 19th century.

A prominence erupts

A well-sized quiescent prominence erupted around noon on 12 September near the Sun's northeast limb.



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