Time-latitude distribution of prominences for 10 solar cycles: A study using Kodaikanal, Meudon, and Kanzelhohe data

We study the long-term variation of the time latitude distribution of solar prominences in this article. To accomplish this, we primarily used the digitized disc-blocked Ca II K spectroheliograms as recorded from Kodaikanal Solar Observatory for the period of 1906-2002.

For improving the data statistics we included full disc H-alpha images from Meudon and Kanzelhohe Observatory, which are available after 1980. We developed an automated technique to identify the latitudinal locations of prominences in daily images from all three data sets. Derived time-latitude distribution clearly depicted poleward migration of prominence structures for 10 cycles (15-24).