2 January — Glaciologist Heidi Sevestre and explorer Matthieu Tordeur reach the South pole on the 61st day of their ice mapping "Under Antarctica" snowkiting expedition.[2]
4 January – The South Korean National Geographic Information Institute (NGII) announces 16Korean names for geographic features around Jang Bogo Station, selected from proposals by the country's public for submission to the Composite Gazetteer of Antarctica.[3]
5 January – NASAscientific balloon which carries Payload for Ultrahigh Energy Observations (PUEO) starts its ascent into the air, after its launch on 20 December 2025.[4][5]
Scientists aboard the Australian icebreaker RSV Nuyina study wildlife and landscape of Heard Island on the vessel's second visit this season.[19]
A planned call between Astrobiologist Dale Andersen in Antarctica and his friend and colleague Zena Cardman on the ISS cancelled after NASA decided to cut short the Crew-11 mission for medical reasons.[20][21]
The sailing research vessels Malizia Explorer and WHY (operated by the Under The Pole team) reunite near Western Antarctic Peninsula for a joint scientific expedition to study mesophotic ecosystems through deep diving.[24]
The "Under Antarctica" expeditioners Heidi Sevestre and Matthieu Tordeur skirt the Thiel Mountains on their way from the South Pole to Hercules inlet, while mapping deep ice layers using radar on pulkas.[33]
Colombia's research vessel ARC Simon Bolivar reaches Antarctica as part of the XII Colombian Scientific Expedition.[39]
16 to 20 January — A team of U.S. government officials conduct inspections of other nations' research stations in Antarctica.[40]
17 January
A group of scientists, medical staff, and logisticians from the Spanish Juan Carlos I Base visit the Bulgarian St. Kliment Ohridski Base to discuss future collaboration and mutual assistance if needed.[41]
The "Under Antarctica" expeditioners Heidi Sevestre and Matthieu Tordeur report passing by the refueling point at Thiel Corner and later by the Brazilian scientific station Criosfera 1 on their way toward Hercules Inlet.[46]
At 19:50 UTC, the "Under Antarctica" expeditioners Heidi Sevestre and Matthieu Tordeur arrive at Hercules Inlet, completing their 80-days-long snowkiting expedition dedicated to mapping the ice with ground-penetrating radar.[48]
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Years in Antarctica (1819–present)
