Quantcast
Channel: SILSO - News Archive
Browsing latest articles
Browse All 13 View Live

2014 : maximum year for solar cycle 24

Now that we completed the definitive sunspot numbers for 2014, we can conclude that the maximum of solar cycle 24 was reached in April 2014, with a maximum of the 13-month smoothed sunspot number at...

View Article


Major change of data set on July 1st, 2015

Over the past 4 years a community effort has been carried out to revise entirely the historical sunspot number series. A good overview of the analyses and identified corrections is provided in the...

View Article


Advancing towards the July 1st transition: no change for our observers

The preparation of the July 1st transition is progressing at high pace. Hundreds of lines of codes are adapted for the new sunspot number series and for the new array of data files. The corrections can...

View Article

New Data pages with archive of past versions

After completing the new data files themselves, we are now finalizing the design of the new sections in our data pages. Indeed, although the new Sunspot Number will bring large improvements to the most...

View Article

Transition to the new Sunspot Number successfully completed

Today marked a triple transition for us: - Uploading the new Sunspot Number archive files containing the daily, monthly and yearly re-calibrated sunspot numbers and the new Group Number series - In our...

View Article


New 'Spotless days' page

Regular solar observers have noticed that since mid-2016, the Sun has occasionally been devoid of sunspots. As the current solar cycle 24 will gradually give way to the new solar cycle 25, several...

View Article

New prediction method

Starting from a collaboration with the NCEI (NOAA, Boulder USA), we implemented new 12-month ahead predictions based on the McNish and Lincoln method. This rather simple method is based on a single...

View Article

Image may be NSFW.
Clik here to view.

Solar Cycle 25

An international panel of experts coordinated by the NOAA and NASA,to which the WDC-SILSO contributed, released a preliminary forecast for Solar Cycle 25 on April 5, 2019. Based on a compilation of...

View Article


Image may be NSFW.
Clik here to view.

Solar cycle minimum passed in December 2019

In January 2020, the 13-month smoothed sunspot number rose for the first time since the maximum of cycle 24 (April 2014). Most probably, this indicates that the minimum between cycles 24 and 25 was...

View Article


Image may be NSFW.
Clik here to view.

The new solar activity cycle.

December 2019 confirmed as starting point of the new solar activity cycleDecember 2019 door Belgische wetenschappers bevestigd als start van de nieuwe zonnecyclusDes scientifiques belges confirment que...

View Article
Browsing latest articles
Browse All 13 View Live