news
Submitted on 2012-09-13
Even when a solar cycle is close to its maximum, it may happen from time to time there are periods with low solar activity. This is especially true when the maximum is predicted to be already low to medium, as is the case for ongoing solar cycle 24. |
Space weather forecasters can issue an alert when solar activity is extremely low. This "all quiet alert" is a message sent when quiet space weather conditions are expected for the next 48 hours or until further notice. This implies that:
|
Submitted on 2012-07-20
The graph underneath could have been the profile of a mountain stage in the Tour de France, but no: it shows the evolution of the x-ray flux as it was observed by the GOES-15 satellite from 17 till 19 July 2012.
![](http://www.stce.be/news.old/151/pic1.png)
Submitted on 2012-07-14In the afternoon of July 12, 2012, the complex and up-to-then relatively quiet sunspot group NOAA 1520 all of a sudden produced an extreme solar flare.
Submitted on 2012-07-10As noted in a previous comment, NOAA 1515 produced 5 high energetic events during its transit. The last of these events was an M6.9-flare on July 8th that occurred while NOAA 1515 was already close to the western solar limb. The flare started at 16:23UT and reached its maximum x-ray intensity at 16:32UT. The images underneath show the eruption as seen by PROBA2/SWAP and in H-alpha during the flare's peak and at 16:54UT. One can clearly see that material is ejected from the blast site.
Pages
Zircon - This is a contributing Drupal Theme
Design by
WeebPal.