1. Centre for Computing in Science Education, Department of Physics, University of Oslo, Sem Sælands vei 24, Blindern, Oslo 0316 Norway, johnm.aiken@gmail.com
2. Also at GFZ German Research Centre for Geosciences, Telegrafenberg, 14473 Potsdam, Germany.
3. Department of Marine Geosciences ‐ LAD, Ifremer, ZI de la pointe du Diable, CS 10070, 29280 Plouzané, France, chastity.aiken@ifremer.fr
4. Also at The University of Texas at Austin, Institute for Geophysics, 10601 Exploration Way, Austin, Texas 78758 U.S.A.
5. GFZ German Research Institute for Geosciences, Telegrafenberg, 14473 Potsdam, Germany, fcotton@gfz-potsdam.de
6. Institute for Earth and Environmental Sciences, University of Potsdam, Karl‐Liebknecht‐Straße 24/25, 14476 Potsdam, Germany.