Two PhD positions in Volcanology, Department of Geosciences, University of Arizona We are looking for two motivated PhD students to work on projects based on modeling the dynamics of volcanic eruptions 1) in the San Francisco Volcanic Field using seismic constraints on magma plumbing architecture, and 2) on the Moon using observational constraints from lunar samples. Interested students are encouraged to contact Dr. Pranabendu Moitra at pmoitra@arizona.edu<mailto:pmoitra@arizona.edu> for further information (https://www.geo.arizona.edu/~pmoitra/about.html). The Department of Geosciences at the University of Arizona is one of the top graduate programs in the country, and guarantees four academic years of support and tuition waiver for all accepted PhD students. Start date: Fall 2023 Application details: Application deadline is January 7, 2023. Instruction and further information for application are available at https://www.geo.arizona.edu/prospective-graduate-students.