Transactions, American Geophysical Union, began as a way to distribute information about AGU's annual meetings. Launched in 1920, the first volume was reprinted from volume 6, number 10 of the
Proceedings of the National Academy of Sciences as
National Research Council Reprint and Circular Series, number 11, and appeared under the title
Scientific papers presented before the American Geophysical Union. It compiled papers from AGU's second annual meeting. These transactions were not printed but were mimeographed for limited distribution only. Transactions changed its scope over the following decades. In 1945, it increased its publication to six times a year and began accepting peer-reviewed articles on Earth and space science topics. In 1959,
Transactions became a quarterly. In 1969, the publication added
Eos to its name for
Eos, the Greek goddess of dawn, representing for AGU the new light being shed by geophysical research on the understanding of Earth and its environment. At this time, the magazine began to be published monthly. In 1979,
Eos, Transactions, American Geophysical Union began publication as a weekly tabloid newspaper. Eos.org was launched in 2014, publishing daily with a monthly print version distributed to AGU members. Issues of
Eos published between 1997 and 2014 are available in the Wiley Online Library. All content published since December 2014 is available online at Eos.org. == Content and contributors ==