Iceberg A23a, Sentinel-3, 5 November 2025

Image of the week: Iceberg A23a breaks up

 

Watching our Earth from space

Iceberg A23a, Sentinel-3, 5 November 2025
Iceberg A23a, Sentinel-3, 5 November 2025

This week’s image of the week is of the much diminished iceberg A23a, north of the island of South Georgia in the Southern Ocean.

Last Updated

13 November 2025

Published on

13 November 2025

The image was captured by one of the Copernicus Sentinel-3 satellites on 5 November 2025.

The A23a iceberg originally broke off from the Filchner-Ronne ice shelf in West Antarctica in 1986 and was then stuck on the floor of the Antarctic Ocean for over 30 years, until it started to move northwards.

After running aground off the island of South Georgia in March 2025, the iceberg then began breaking apart north of South Georgia by late August.

Iceberg A23a, Sentinel-3, 5 November 2025

Iceberg image

This image was captured by the OLCI instrument on one of the Copernicus Sentinel-3 satellites on 5 November 2025.

EUMETSAT operates the Copernicus Sentinel-3 satellites, in cooperation with ESA, and delivers the marine data on behalf of the European Union.

More info

Visualise Sentinel-3 data on EUMETView or WEkEO

Iceberg A23a through the decades

The iceberg can also be seen from Meteosat-12 on EUMETView (updated every ten minutes)

Visit the OSI SAF for sea ice products

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