The document describes GeoChronos, an online collaborative platform for earth observation scientists. GeoChronos aims to facilitate collaboration between scientists, provide access and management of data and applications. It leverages web 2.0, social networking and cloud computing technologies. The platform provides solutions for collaboration through social networking features, data through automated acquisition, storage and processing, and applications through an interactive application service and batch processing. A demonstration of GeoChronos' key features is presented and the project status and team are outlined.