Corpus ID: 118818991

Latitude of Ephemeral Regions as Indicator of Strength of Solar Cycles

@inproceedings{Tlatov2010LatitudeOE,
  title={Latitude of Ephemeral Regions as Indicator of Strength of Solar Cycles},
  author={Andrey G. Tlatov and Alexei A. Pevtsov},
  year={2010}
}
Digitized images of full disk CaK spectroheliograms from two solar observatories were used to study cycle variation of ephemeral regions (ERs) over ten solar cycles 14-23. We calculate monthly averaged unsigned latitude of ERs and compare it with annual sunspot number. We find that average latitude of ERs can be used as a predictor for strength of solar cycle. For a short-term prediction (dT about 1-2 years), maximum latitude of ephemeral regions (in current cycle) defines the amplitude of that… Expand

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