You can follow the Open Invitations link and react to the calls published. ( http://geographia2015.blogspot.be/p/open-invitations.html )
You can follow the Facebook page and react/comment on the posts, or post something yourself.
https://www.facebook.com/geographia2015
You can follow the posts on Geographia's home page and comment, or send your data to the operator.
(geographia.2015@gmail.com)
If Geographia settles around your neighbourhood, you are welcome to take part in the enactments anounced.
Once you participate you automatically become a fragment of Geographia.