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A Million Years Without a Megaslide
A new study goes deep into the Gulf of Alaska to examine the sixth-largest underwater landslide and investigate why a similar event hasn’t happened since.
Source: Geophysical Research Letters Earthquakes, volcanic activity, and sediment flux can trigger underwater landslides known as submarine slides, which can translate to tsunamis on the surface. Using images from seismic reflection surveys and ground truth data from drilling efforts in the Gulf of Alaska, researchers uncovered the existence of the slide, as well as the seafloor topography from before and after it occurred. The researchers suggest that sediment buildup and flux at the start of the MPT due to great ice extents caused slope instability, meaning when a large earthquake struck the region, it likely triggered the megaslide.
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