1920: First Meeting
25 members were present at the first meeting of AGU.
1932: Annual Dues Set
Annual Membership dues was $2.00
1939: First William Bowie Medal Awarded
AGU awarded the first William Bowie Medal to Richard Field for outstanding achievement in cooperative research.
1940: Tectonophysics Section Established
Tectonophysics Section was established and Leason Heberling Adams elected Section president.
1945: Transactions Launched
Transactions launched as an official publication of AGU
1956: Geophysical Series Launched
Geophysical Mograph Series launched.
1958: Eight Sections Established
AGU established eitght Sections: Geodesy; Seismology; Meterology; Geomagnetism and Aeronomy; Oceanography/Volcanology/Geochemistry; Petrology; Hydrology; and Tectonophysics.
1962: First Class of Fellows
AGU announces 196 members as the first class of Union Fellows.
1964: New Journal Announced
Due to popularity, AGU splits the journal JGR and publishes the first issue of JGR: Space Sciences.
1965: First Issue of Water Resources Research Published
AGU published the first issue of Water Resources Research with co-editors Walter B. Langbein and Allen Kneese.
1968: New Journals Announced
AGU splits JGR again and publishes JGR: Space, Solid Earth, and Atmospheric and Oceans
1968: Western National Meeting becomes Fall Meeting
AGU 's Western National Meeting held in San Francisco, California becomes the Annual Fall Meeting.
1969: First Issue of Eos Published
AGU publishes the first monthly issue of Eos, the new Transactions.
1972: AGU Becomes a Society
AGU formally incorporated as an independent society.
1974: First issue of GRL Published
AGU publishes the first issue of Geophysical Research Letters with Noel Hinners as editor.
1975: Chapman Conferences Established
Council adopts the name Chapman Conference for topical meetings.
1978: New Journals Announced
AGU launches the new journals JGR: Space Physics, JGR: Solid Earth, JGR: Oceans.
1979: New AGU Headquarters
AGU moves into a new building moved to a new headquaters building at 2000 Florida Avenue in Washington, D.C.
1979: Eos Published Weekly
Eos transitions to a weekly news-sheet.
1982: First Ocean Sciences Meeting Convened
AGU and ASLO convenes the first joint Ocean Sciences Meeting with 700 attendees.
1986: First Issue of Paleoceanography Published
AGU publishes the first issue of Paleoceanography which transitioned to Paleoclimatology in 2017.)
1991: Demolition of Old AGU Headquarters
Council approves razing the AGU headquarters building and building a new headquarters designed to take AGU well into the next century.
1991: New Journal Announced
AGU launches the journal JGR: Planets.
2000: First Online Journal
AGU estlishes the first online journal G- Cubed - Geochemistry, Geophysics, Geosystems.
2002: All AGU Journals Published Online
Publication of AGU journals advances with technolgoy and are available online.
2009: AGU’s First Open Access Journal
AGU publishes the first fully open access journal JAMES.
2010: New AGU Mission
Board approves a new stragetic mission for AGU.
2012: AGU Partners with Wiley
AGU partners with publisher John Wiley & Co. for journal and book distribution.
2013: Earth’s Future Established
AGU establishes the open access journal Earth 's Future examining the state of the planet and its inhabitants, sustainable and resilient societies.
2014: Eos.org Goes Live
AGU launches the online Eos.org, making the publication more accessible to all audiences.
2016: AGU Headquarters Approved for Net Zero Renovation
Board of Directors approves the renovation of AGU's headquarters as the first net zero energy commercial building renovation in Washington, D.C.
2016: New Journal and Section Announced
AGU establishes the journal GeoHealth and GeoHealth Section.
2017: Fall Meeting Relocates
AGU Convened the 50th Fall Meeting in New Orleans, Louisiana.
2018: AGU Launches Centennial Celebration at Fall Meeting
AGU launches Centennial Celebration