000003507 001__ 3507
000003507 005__ 20180202114840.0
000003507 037__ $$aSEMIN-2018-0019
000003507 100__ $$aLefevre, Laure
000003507 245__ $$aLong term solar activity
000003507 260__ $$c2017
000003507 269__ $$c2017-11-16
000003507 520__ $$aI will present a study of solar activity on the long and very long term. I will first present different solar activity indicators available and their timelines. I will then focus only on a few long term indices to understand the different patterns present in solar activity (periodicities on different timescales, long term variations). As the Sunspot Number is the longest direct measurement of solar activity, we will focus on this well-known index and its historical origins, construction and re-construction that might influence its long term variations. We will also explain how it is built on a day-to-day basis here at SILSO. To conclude, we will see what the Sunspot Number series is used for and how we can use it to predict future solar activity.
000003507 594__ $$aNO
000003507 773__ $$tROB
000003507 8560_ $$flaure.lefevre@observatoire.be
000003507 980__ $$aSEMIN