Giant Greenland landslide spawns 650-foot mega-tsunami that rattled global seismographs for days

A September 2023 landslide in Greenland’s Dickson Fjord unleashed a 650-foot mega-tsunami that produced a nine‑day, worldwide seismic pulse detected across oceans; satellite data and models linked the event to fjord geometry and ice loss, highlighting how next‑gen satellites like SWOT can improve Arctic warning systems.