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The study aims to refine the understanding of the dynamics and volume of volcanic flank collapses, specifically at Monte Amarelo in Cabo Verde.

July 13, 2026Bulletin of VolcanologyOpen Access

Seismic evidence of multi-stage volcanic flank collapse and refined deposit volume offshore Fogo, Cabo Verde

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Randomized trial reveals extensive debris avalanche deposits in volcanic islands, suggesting significant tsunami risks.

The study aims to refine the understanding of the dynamics and volume of volcanic flank collapses, specifically at Monte Amarelo in Cabo Verde.
Utilized high-resolution multibeam bathymetry and multichannel seismic reflection data to analyze the volcanic collapse.
Identified and mapped a 914 km² debris avalanche deposit associated with the Monte Amarelo collapse.
Estimated the collapse volume to be approximately 98 km³.
Identified an extensive debris avalanche deposit indicating rapid emplacement and high tsunamigenic potential.
Discovered a smaller, previously unknown deposit superimposed on the main deposit suggesting multiple stages of collapse.
Provided the first direct imaging-based volume estimate of 98 km³ for the Mont Amarelo collapse.

Hadré et al. (2026) studied this question.

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