Extended time series of Solar Activity Indices (ESAI) is database including observational, synthetic and simulated sets to study Solar magnetic field variations and their influence on the Earth. ESAI extend the ordinary lengths of some traditional indices of solar activity: sunspot areas, Wolf numbers (equatorial component of magnetic field of the Sun), polar faculae numbers (polar component), mean latitudes, N-S asymmetry of hemispheres (location of activity). Series . ...

Multi-Wavelength investigations of the Sun and modern problems of solar activity . SAO RAS . ... Major topics of the conference: . ... Modern observational methods for solar investigations. ... SAO RAS) - chairman . ... Special Astrophysical Observatory of the Russian Academy of Sciences (SAO RAS) together with the Main (Pulkovo) Astronomical Observatory are carring out the All-Russian conference on solar physics "Multi-Wavelength Investigations of the Sun and modern problems of solar activity". ...