Phys.org  September 14, 2024 A large rockslide occurred in Greenland on 16 September 2023 that generated a local tsunami. The event was energetic enough to generate a global signal that resonated for 9 days. An international team of researchers (Denmark, UK, Germany, Belgium, France, USA – USGS, UC Berkeley, UC San Diego, UC Riverside, Boston College, University of Washington, Norway, The Netherlands, Italy, Sweden, Spain, Costa Rica, New Zealand, Indonesia, Greenland) detected the start of a 9-day-long, global 10.88-millihertz (92-second) monochromatic very-long-period (VLP) seismic signal, originating from East Greenland. They demonstrated how this event started with a glacial thinning–induced rock-ice […]