For all rare halos of the world is database now. The most contribution to database is from Finnish, Czech and German observing networks, and from a couple of active observers from USA. You can search the database in four ways: all observations, name of observer, country of observation and name of halo.
Please visit: http://www.halo.astronomie.cz/database.php
I think, it's a really hard work for you to collect and enter all this observations. You have my respect!
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Claudia
Thank you. Yes, it is hard work, but it is useful for all observers.
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