Eos

A humble elevator shaft was recently used in a test of the constancy of the speed of light. Credit: Jason Wong/Flickr , CC BY-NC-ND 2.0

A NOAA animation shows the change in sea surface temperature departures from average in the tropical Pacific Ocean during the first week of January 2026. Credit: NOAA Satellites

Corona Heights fault, California. (a) Whole outcrop view. The inset corresponds to the surface shown on (c). (b) Zoom on the fault showing different segments constituting the surface. (c, d) Map of fault surfaces scanned using LiDAR. The inset in (c) corresponds to the patch shown on (d). Credit: Candela et al. [2011] , Figure 2(a-d)

Only a handful of spacecraft, some of which are illustrated here, monitor the vast space between the Sun and Earth, including the planet’s magnetosphere. To forecast space weather effectively, scientists must connect these scattered observations and extract as much information as possible from the limited data they provide. Credit: Mary Heinrichs/AGU

Before and after satellite imagery of the impacts of Cyclone Senyar. From: Meijaard et al. (2026).

Wildfires, and the costs of fighting them, are projected to increase in the western United States, particularly the Northwest, research suggests. Credit: Kari Greer, USDA Forest Service/Flickr , Public Domain

Alfalfa fields—which one of the authors (B.L.G.) grew up irrigating—flank a stream in northeastern Wyoming. Climate change is altering streamflows and the agricultural practices that depend on them in this area and across the U.S. West. Credit: Beatrice L. Gordon

A failure in a coastal cliff at Sitio Buhangin, Barangay Patuco, Sarangani following the 8 June 2026 earthquake near Mindanao. Image tweeted by Radyo Pilipinas.

NASA’s Artemis II mission launched on 1 April 2026 from Kennedy Space Center in Florida. New research shows that solid-state rocket fuels, which were used in rocket boosters for this launch, deplete the ozone more than other types of rocket fuels. Credit: NASA/John Kraus

Initial Pager map of landslide hazard from the 8 June 2026 earthquake offshore Mindanao in the Philippines. Source: USGS.

Mangroves, such as these ones in Cispata Bay, Colombia, effectively produce, trap, and store carbon-rich soil, but the future of this carbon storage is uncertain because of rising sea levels and climate change. Credit: Luisa Fernanda Gómez Vargas

An artistic rendering of early Earth during the Hadean eon shows a surface shaped by frequent impacts, localized melting, and regions with persistent liquid water. Neither entirely hellish nor tranquil, early Earth was a dynamic environment frequently transformed by impact bombardment. Credit: SwRI/Simone Marchi

Eastern oysters ( Crassostrea virginica ) cement their shells together to form reefs along Atlantic coasts. Credit: Johnny Andrews/UNC-Chapel Hill

Indian Ocean, De Hoop Nature Reserve, South Africa. Credit: John Cameron, Unsplash

A surface mooring deployed by the Ocean Observatories Initiative. Credit: Sheri N. White © WHOI, Image from work supported by the U.S. National Science Foundation Ocean Observatories Initiative

Artists and scientists teamed up to create art pieces based on data collected at FLUXNET towers throughout the United States. Credit: Julia Oldham

The AGU Books Program spans nearly 20 book series and comprises more than 750 volumes, published since its inception in 1956.

This enhanced-color image from the MESSENGER mission shows (from left to right) the craters Munch, Sander, and Poe. The hollows are the bright blue areas covering the floor of Sander and dotting the rims of Munch and Poe. The hollows are highly reflective and naturally appear bluish, but the spacecraft’s camera used color filters to exaggerate the spectrum in this image. Credit: NASA/Johns Hopkin…

A storm approaches Cape Shirreff in Antarctica. Credit: Ray Buchheit, NOAA NMFS SWFSC Antarctic Marine Living Resources Program/Flickr , CC BY 2.0

(a) Map view of the Gonghe Basin. The upper left inset shows the location of the Gonghe Basin in the broader Tibetan Plateau (red square). Cyan circles show epicenters of earthquakes during January 2009–July 2021 collected from the National Earthquake Data Center ( NEDC ). Beachballs represent focal mechanisms that mark M≥ 5 aftershocks of the 26 April 1990 Ms 7.0 event (compiled from Diao et al.…