Add to ORKGInternational audienceIn this short contribution the use of different sunspot numbers for the estimation of past solar and upper atmosphere conditions from historical and modern auroral observations realised by Schröder et al. (2004) is analysed. Moreover, some comments are made on the relationships between mean annual visual observations of the auroras at middle latitudes of Europe and the mean annual sunspot number during 1780?1829. Keywords. Atmospheric composition and structure (Airglow and aurora) ? Magnetospheric physics (Auroral phenomena, solar wind-magnetosphere interactions) ? History of geophysics (Solar-planetary relationship
The earliest known drawing of sunspots appears in The Chronicle of John of Worcester, which was co...
The varying length of the 11-year cycle has been found to be strongly correlated with longterm varia...
Incursions of high-energy particles from space, specifically solar energetic particles and galactic ...
In this short contribution the use of different sunspot numbers for the estimation of past solar an...
International audienceOn the basis of the analysis of the data of auroral observations at middle lat...
Both auroral and geomagnetic activity provide information from which the behavior of the magnet-osph...
It is the purpose of this paper to present evidence concerning the observation of aurorae in the y...
Abstract. Knowledge of solar variability and its effects on the Earth is essential since the Sun aff...
Comprehensive catalogues of ancient sunspot and auroral observations from East Asia are used to iden...
The extension of sunspot number series and auroral observations backward in time is of considerable ...
Aims. Historical records provide evidence of extreme magnetic storms with equatorward auroral extens...
Using information on geomagnetic activity, sunspot numbers and cosmogenic isotopes, supported by hi...
Sunspots have a diameter of about 37,000 km and appear as dark spots within the photosphere, the out...
International audienceThe validity of a technique developed by the authors to identify historical oc...
The Societas Meteorologica Palatina, or Meteorological Society of Mannheim, was set up in 1781 to co...
The earliest known drawing of sunspots appears in The Chronicle of John of Worcester, which was co...
The varying length of the 11-year cycle has been found to be strongly correlated with longterm varia...
Incursions of high-energy particles from space, specifically solar energetic particles and galactic ...
In this short contribution the use of different sunspot numbers for the estimation of past solar an...
International audienceOn the basis of the analysis of the data of auroral observations at middle lat...
Both auroral and geomagnetic activity provide information from which the behavior of the magnet-osph...
It is the purpose of this paper to present evidence concerning the observation of aurorae in the y...
Abstract. Knowledge of solar variability and its effects on the Earth is essential since the Sun aff...
Comprehensive catalogues of ancient sunspot and auroral observations from East Asia are used to iden...
The extension of sunspot number series and auroral observations backward in time is of considerable ...
Aims. Historical records provide evidence of extreme magnetic storms with equatorward auroral extens...
Using information on geomagnetic activity, sunspot numbers and cosmogenic isotopes, supported by hi...
Sunspots have a diameter of about 37,000 km and appear as dark spots within the photosphere, the out...
International audienceThe validity of a technique developed by the authors to identify historical oc...
The Societas Meteorologica Palatina, or Meteorological Society of Mannheim, was set up in 1781 to co...
The earliest known drawing of sunspots appears in The Chronicle of John of Worcester, which was co...
The varying length of the 11-year cycle has been found to be strongly correlated with longterm varia...
Incursions of high-energy particles from space, specifically solar energetic particles and galactic ...