Lago Geve is a proglacial lake on the western margin of the Southern Patagonia Ice Cap that several glacier terminate in; Greve Glacier, Lautaro Glacier, HPS-8 Glacier and Pio XI Glacier. This is one of the largest proglacial lakes in the world with an area of ~190 km2. The lake drains through an outlet river on the northwest shore of the lake. Erosion of the oulet channel did lead to a signfnificant decline in lake level and lake area (~14 km2) in 2020 (Hata et al 2022). Any GLOF from this lake does not pose a hazard do the remoteness of the lake and the fjord it feeds. The lake level has been static since this event. The outlet river enters the fjord near the retreating Occidental Glacier.
In 2026 the terminus tongue of Lautaro Glacier calved, and area of 1.5 km2, littering the ice front area with icebergs (upper yellow arrow). Lake Crego is an ice-dammed lake impounded by Pio XI Glacier, that has also calved significantly in 2026, helping fille the lake with ice bergs (lower yellow arrow)
