A Manhattan-Sized Iceberg Broke Off Greenland's Petermann Glacier

In August 2026, satellites recorded a huge block of ice — the size of the island of Manhattan — breaking away from the Petermann Glacier in northwest Greenland. Images from agencies like NASA and ESA show the scale of the event, and leave a question anyone asks on seeing them: how big, really, is a piece of ice like that?

Short answer

The Petermann Glacier ends in a floating ice tongue that extends out over the sea. In August 2026, a block roughly the size of Manhattan (about 60 km²) broke off it — a process called calving. What's striking isn't that it happens — glaciers shed ice from their edges naturally — but the size: it's one of the largest ice islands seen to break away at once.

What the Petermann Glacier Is

The Petermann is one of Greenland's great glaciers. Its most distinctive feature is a floating ice tongue: an ice shelf that, instead of ending on land, extends tens of kilometers out over a fjord, floating. That tongue is the part that, every so often, fractures and releases blocks into the sea.

Ice breaking off the front of a glacier is a normal geological process: it's how a glacier flowing toward the sea sheds its ice at the end. What varies — and what draws attention here — is the size of the block that separates at once.

Why the Size Is Striking

"The size of Manhattan" sounds like a headline, but it's a concrete reference: the island of Manhattan is about 59 km². A block of ice that size is hard to picture until you place it next to familiar things. See it to scale in the widget.

How big is "the size of Manhattan"?

The ice block's area (~59 km²) compared to scale with familiar places. Each rectangle is proportional to its real surface area.

Block area ~59 km²

Equivalent to ~17 Central Parks

Reference areas: block ~59 km² (size of Manhattan), Central Park ~3.4 km², a large international airport ~20 km². Schematic comparison of areas, to give a sense of scale.

Put in perspective, that block covers an area equivalent to about 17 times New York's Central Park, or thousands of soccer fields together. And it isn't an isolated case in the Petermann's history: in 2010 an ice island of about 250 km² broke off, and in 2012 another of about 120 km², according to satellite observation records. The 2026 event joins that list of large calvings documented from space.

The Takeaway

The Petermann calving is, above all, a phenomenon of scale: a block of ice the size of an entire city breaking off a glacier and drifting away as a floating island. NASA and ESA satellites make it possible to measure these events precisely and track their path — something unthinkable a few decades ago.

And the natural question remains, the one that makes such news tangible: how big is that really, compared with places you know? An iceberg size comparator lets you put a human scale on a figure that is otherwise hard to imagine.

Information based on observations from space agencies such as NASA (Earth Observatory) and ESA (Copernicus program / Sentinel satellites). The reference areas are approximations to convey the scale. Informational and educational, focused on the geographic aspect of the phenomenon.

Educational note on the August 2026 Petermann Glacier calving, based on public satellite reports (NASA, ESA). Figures are approximate and may be revised.