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.
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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.
Tiny Solar Bursts Show Pulses Like Big Flares
New findings from the European Space Agency’s Solar Orbiter spacecraft reveal that even the tiniest bursts of activity from the Sun may behave like their larger counterparts.
SC25 maximum in October 2024
The STCE's SC25 Tracking page has been updated. The latest SIDC/SILSO provisional data indicate that SC25 reached a maximum smoothed monthly sunspot number of 160.8 in October 2024.
X-class flares
SIDC Sunspot Group 523 (NOAA Active Region 4114) produced an X1.2 flare on 17 June and an X1.9 flare late on 19 June. No coronal mass ejection seems to have been associated with these flares. ***UPDATED (1)***
Proba-3: first eclipse images
This is the image of the duo-satellite Proba-3 making solar eclipses, just released by the European Space Agency, ESA.
First view of the solar poles with EUI
Thanks to a push from planet Venus earlier this year, the orbit of the Solar Orbiter spacecraft was tilted. A century ago mankind raced to explore the poles of the Earth, now Solar Orbiter made its way to the poles of the Sun. For the very first time the solar poles have been imaged!
Arrived...
A severe geomagnetic storm is currently (1 June) in progress following the arrival of an interplanetary coronal mass ejection launched early on 31 May. (UPDATED)
Keeping us on our toes...
NOAA 4098 surprized space weather forecasters with an X1.1 flare on 25 May.