news
Submitted on 2014-02-06
On 27 January, a big, complex region rounded the Sun's east limb and was labelled NOAA 1967. This large sunspot group was the return of NOAA 1944 which appeared early January and was very active at that time, including 7 M- and 1 X-class flare. Using solar eclipse glasses, both groups were easy naked-eye objects.
Submitted on 2014-01-16
Without a doubt, the big and complex sunspot group NOAA 1944 was the talk of the week. During its transit over the solar disk (1-14 January), it produced 1 X- and 7 M-class solar flares. Here we will deal with some of the more enigmatic aspects of the group's size and the X-class flare it produced.
1. Was NOAA 1944 the largest sunspot group so far this solar cycle?
Submitted on 2014-01-09
This promising letter arrived at the STCE’s Public Outreach Office on 1 January. It reads:
The Sun apparently wants to keep its New Year's resolutions. Indeed, on the very first day of the year it produced a great prominence eruption, a very strong solar flare, and one of the largest sunspot groups so far this solar cycle. This can be seen in this movie.
Submitted on 2014-01-02
During 2013, long stretches of solar inactivity alternated with brief spurts of high flaring activity levels. The periods of solar calm featured numerous filament and prominence eruptions, with so many spectacular events they could easily fill this review. There were 12 X-class solar flares, almost as many as 2011 and 2012 combined. Yet, only 5 sunspot regions were responsible for these extreme explosions on the Sun, and most of them took place during the latter part of 2013.
Submitted on 2013-12-19
On December 8 and 13, something particularly interesting happened in the solar wind: ACE in situ solar wind data showed a shock and both times the shock was driven by a coronal hole. Shocks driven by a coronal mass ejection are common. But this was shocking news.
Fast catches up with slow
Submitted on 2013-12-13This news item was created by the P2SC-team and is available here.
Submitted on 2013-11-29
This news item was written by Dan Seaton and the P2SC-team.
Comet ISON raced past the Sun on November 28, but left no clues about its structure — or the structure of the solar corona — for extreme-ultraviolet (EUV) telescopes like SWAP that had been turned towards the unique comet in the hope of capturing images of its passage through perihelion.
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