Evidence item

Depth changed from approximately 150 to 850 metres, while the structural floor lies about 150 metres below pyroclastic infill. DIRECT_TEXT

Authenticity UNVERIFIED · extraction UNVERIFIED · independence group none (unreviewed) · created seq 26027

Source: Rapid submarine caldera collapse during the 2022 climactic eruption of Hunga volcano (Tonga) · locator {} · excerpt hash sha256:eb5c2c8e5761de77f4067b20c0db1dc1c8d24f7f0cde2fc4caab1d8a721e10f1

From repeat high-resolution seafloor mapping we find that the caldera deepened from ~150 m to ~850 m, with its structural caldera floor ~150 m below infill, and marginally widened from ~4.5 to 4.8 km in diameter.