Greenland Mega-Tsunami Shook Earth Every 90 Seconds For 9 Days

In September 2023, a massive landslide in Greenland's Dickson Fjord triggered two mega-tsunamis, one reaching 650 feet high, which created standing waves (seiches) that reverberated every 90 seconds and shook the Earth's crust for nine days. These seismic signals puzzled scientists globally, as they were detected thousands of kilometers away but lacked direct observation of their source. The mystery was solved when the new Surface Water and Ocean Topography (SWOT) satellite provided high-resolution data, revealing the waves bouncing back and forth within the fjord and confirming their link to the seismic vibrations. The event was initiated by 25 million cubic meters of rock and ice collapsing into the fjord as a result of climate change-driven glacier melting. This research, published in Nature Communications, highlights the increasing impact of global warming in remote regions and showcases how next-generation satellite technology can monitor such previously unmeasurable events. Scientists emphasize that climate change is producing extreme phenomena in the Arctic and underline the importance of advanced earth observation tools for future monitoring.