The American Geophysical Union invites nominations for the election of members to the rank of Fellow. Each year, about 100 nominations reach the Fellows Committee through the AGU Sections, and about half are elected. The number of Fellows is limited to at most .1% of the membership, which makes this honor very prestigious. The Union Fellows are distinguished scientists who have made important contributions to one or several fields of geophysical sciences. While such people often are at high positions at universities or institutions, the selection committee feels very strongly that the scientific merits are the most important criterion for fellowship. AGU has a significant number of non-U.S. members, who at present are underrepresented in the Fellows program. I would like to invite you to consider suitable candidates amongst your colleagues and to make nominations following the instructions included in this issue.