NASA Captures Tyndall Glacier's Rapid Retreat in Southern Patagonia
An astronaut aboard the International Space Station photographed Tyndall Glacier in southern Chile on May 10, 2026, showing active calving and iceberg formation in Lago Geikie. The glacier has lost 2.2 kilometers in length since November 2022 and has been shrinking for 150 years following the Little Ice Age. Monitoring remote glaciers through satellite and astronaut imagery helps scientists track climate-driven ice loss in regions difficult to access from the ground.
NASA's Earth Observatory released an astronaut photograph of Tyndall Glacier, part of the Southern Patagonian Icefield, showing fragments of calved ice floating in Lago Geikie beneath ethereal clouds. According to glaciologist Mauri Pelto of Nichols College, the glacier has experienced significant retreat, losing 2.2 kilometers in length since November 2022, with a major calving event occurring in March and April 2023. The glacier's terminus now stands 30–40 meters above the lake surface, and Lago Geikie itself formed around 1940 as the ice retreated from its previous terminus in Lago Tyndall to the east. The heavily crevassed appearance of the calving front suggests continued iceberg production in the coming months. This observation exemplifies how astronaut photographs and orbital data provide valuable monitoring capabilities for remote glaciers where ground-based observations are limited.
What different sources said
- NASACenter
Tyndall’s Trail of Bergs
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