EarthArXiv (pronounced "Earth archive") is both a preprint server and a volunteer community devoted to open scholarly communication. As a preprint server, EarthArXiv publishes articles from all subdomains of Earth Science and related domains of planetary science. These publications are versions of scholarly papers that precede publication in peer-reviewed scientific journals. EarthArXiv is not itself a journal and does not evaluate the scientific quality of a paper. Instead, EarthArXiv serves as a platform for free hosting and rapid dissemination of scientific results. The EarthArXiv platform assigns each submission a Digital Object Identifier (DOI), therefore assigning provenance and making it citable in other scholarly works. EarthArXiv's mission is to promote open access, share open acc