Submarine landslide megablocks show half of Anak Krakatau island failed on December 22nd, 2018.

ABSTRACT: As demonstrated at Anak Krakatau on December 22^nd, 2018, tsunamis generated by volcanic flank collapse are incompletely understood and can be devastating. Here, we present the first high-resolution characterisation of both subaerial and submarine components of the collapse. Combined Synthetic Aperture Radar data and aerial photographs reveal an extensive subaerial failure that bounds pre-event deformation and volcanic products. To the southwest of the volcano, bathymetric and seismic reflection data reveal a blocky landslide deposit (0.214 ± 0.036 km³) emplaced over 1.5 km into the adjacent basin. Our findings are consistent with en-masse lateral collapse with a volume ≥0.175 km³, resolving several ambiguities in previous reconstructions. Post-collapse erup

SUBMITTER: Hunt JE 

PROVIDER: S-EPMC8121911 | biostudies-literature | 2021 May

REPOSITORIES: biostudies-literature