A pumice raft drifts amid the South Pacific near Tongas

Sentinel-1 CSAR IW acquired on 11 August 2019 at 17:08:00 UTC
Sentinel-2 MSI acquired on 11 August 2019 at 21:59:19 UTC
Sentinel-2 MSI acquired on 16 August 2019 at 21:59:21 UTC
Sentinel-2 MSI acquired on 21 August 2019 at 21:59:19 UTC
Author(s): Sentinel Vision team, VisioTerra, France - svp@visioterra.fr
Keyword(s): Water colour, volcanoes, geohazard, marine traffic, ship security, Tonga islands, Pacific Ocean
Fig. 1 - S2 (11.08.2019) - 11,8,2 colour composite - A pumice raft formed near Tonga Islands after a submarine eruption on 07.08.19.
2D view
The same volcano is already responsible for several occurrences of this rare event in the past.
Fig. 2 - S1 (11.08.2019) - vv,vh,ndi(vh,vv) colour composite - A radar acquisition the same day confirms its heterogeneity in density.
2D view
Fig. 3 - S2 (16.08.2019) - 11,8,2 colour composite - Measuring over 150 km², it looses its density as it drifts and widens.
3D view
Fig. 4 - S2 (21.08.2019) - 11,8,2 colour composite - Denser areas show in brown on this composite.
3D view
The views expressed herein can in no way be taken to reflect the official opinion of the European Space Agency or the European Union.
Contains modified Copernicus Sentinel data 2025, processed by VisioTerra.
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