Tuesday, April 25, 2006
Dear friends and observers of atmospheric phenomena!
In addition to the worldwide exchange of information on the apparition of rare haloes, we hereby open an international collection of rare types of general atmospheric phenomena. If you have observed one of the phenomena listed up here, please send an expressive picture (perhaps with links to more pictures) and a short text to one of the contributors listed below. We are looking forward to receiving a large number of postings!