Detail of the Grand Prismatic Spring in Yellowstone National Park.
Imaggeo is the online open access geosciences image repository of the European Geosciences Union. Every geoscientist who is an amateur photographer (but also other people) can submit their images to this repository. Being open access, it can be used by scientists for their presentations or publications as well as by the press. If you submit your images to imaggeo, you retain full rights of use, since they are licenced and distributed by EGU under a Creative Commons licence.
Don’t forget you can enter the EGU GA 2011 Photo Competition until the 11th March. However, you need to be pre-registered for the EGU GA 2011.