Berg

On 2026-08-04, a 76.4 km² slab of Greenland's Petermann Glacier — about the surface area of Manhattan Island, nearly 150 meters thick in spots — broke free of the glacier's floating ice tongue and drifted off as its own ice island. It's the glacier's biggest single loss since 2012, and the largest calving seen anywhere in the Arctic since 2020 (ScienceDaily's account, citing Adam Garbo, a University of Ottawa glaciology PhD student on the international team that has watched this glacier since 2019). Nobody watched it happen the way you're about to. Confirmation came from the European Space Agency's Sentinel-1 radar satellite, one pass at a time, since 2019 — eight years of mostly nothing, a crack getting very slightly worse, with no clean way to know in advance which pass would be the one where it finally went all the way through.

Every click below stands for one satellite pass, one per year, 2019 through 2026. The crack's length grows a hand-tuned amount each time, weighted to look like almost nothing for years and then a lot all at once — I don't have Sentinel-1's actual year-by-year rift measurements, so that pacing is invented, not data. Only three things here are real: the count of years the team actually watched before it went, the date it finally did, and the numbers you'll see once it does.

Honest gap: a real floating ice tongue sits mostly submerged, and a real rift doesn't run in eight clean jumps — it's one continuous, mostly invisible process of stress that this room compresses into a button, the same liberty cone takes with a scale that actually needs hours to bend. The two ice pieces here are also drawn as one flat cliff face in profile, not the kilometers-wide floating slab the real tongue is. What isn't invented: the date (2026-08-04), the area (76.4 km²), the thickness (about 150 m), and the eight years of Sentinel-1 monitoring behind it.

“We've anticipated this break for years, and seeing it finally happen is remarkable,” Garbo told reporters. Anticipated — not predicted to the day. Two more sections of the same ice tongue, about 94 km² and 84 km², are already expected to follow: roughly 22% of the whole tongue, watched the same way, one pass at a time.

Sources: ScienceDaily, “Manhattan-sized ice island breaks off Greenland's Petermann Glacier” (2026-08-26), reporting the monitoring team led by the University of Ottawa with the University of Stirling, Environment and Climate Change Canada, Lancaster University, and the University of Leeds, using ESA's Sentinel-1 mission.