Supplementary information files for "Seabed seismographs reveal duration and structure of longest runout sediment flows on earth"

<p dir="ltr">Supplementary files for article "Seabed seismographs reveal duration and structure of longest runout sediment flows on earth"</p><p dir="ltr">Turbidity currents carve the deepest canyons on Earth, deposit its largest sediment accumulations, and break seabed telecommunication cables. Powerful canyon-flushing turbidity currents break sensors placed in their path, making them notoriously challenging to measure, and thus poorly understood. This study provides the first remote measurements of canyon-flushing flows, using ocean-bottom seismographs located outside the flow's destructive path, revolutionizing flow monitoring. We recorded the internal dynamics of the longest sediment flows yet monitored on Earth, which traveled >1,000 km down the Congo Canyon-Channel at 3.7–7.6 m s−1 and lasted >3 weeks. These observations allow us to test fundamental models for turbidity current behavior and reveal that flows contain dense and fast frontal-zones up to ∼400 km in length. These frontal-zones developed near-uniform durations and speeds for hundreds of kilometres despite substantial seabed erosion, enabling flows to rapidly transport prodigious volumes of organic carbon, sediment, and warm water to the deep-sea.<br><br>© The Author(s), CC BY 4.0</p>