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The best of... 2023!

An overview and movie of some spectacular solar and space weather events in 2023 are available at the STCE's solar cycle highlights webpage.

X1 flare

An M9.9 flare and an X1.5 flare were observed from the same active region NOAA 3766 on resp. 28 and 29 July.

Powerful eruption on the Sun's farside

Old NOAA 3738 produced a very strong X-class flare late on 22 July. Solar Orbiter's STIX instrument indicates this might have been an X14 flare. The associated CME is heading away from Earth, towards Solar Orbiter. ***UPDATED***

High sunspot numbers

Preliminary sunspot numbers during last week were the highest in 22 years.

X1 flare in NOAA 3738

NOAA 3738 produced an X1.2 flare on 14 July 2024. ***UPDATED (2)***

The STCE in 2022

The STCE Annual Report 2022 is now available at https://www.stce.be/annualReport

An X12 flare on the Sun's farside

On 20 May, instruments on board Solar Orbiter observed what was most likely the strongest solar flare so far during SC25.

Impressive eruption

An impressive eruption took place over the Sun's southwest limb on 24 June.

Topical Issue "Severe SWx events of May 2024 and their impacts"

The Journal of Space Weather and Space Climate (JSWSC) opens a Topical Issue "Severe space weather events of May 2024 and their impacts".

Hpo

The fairly recent Hpo geomagnetic index deals with the two major shortcomings of the Kp index.

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