Pritchard, M., T. A. Mather, S. R. McNutt, F. J. Delgado, and K. Reath (2018), Author for correspondence: M. E. Pritchard e-mail: pritchard@cornell.edu Thoughts on the criteria to determine the origin of volcanic unrest as magmatic or non-magmatic,
Opinion piece, 20180008, doi:10.1098/rsta.2018.0008.