650-foot tsunami in Greenland fjord made waves that lasted 9 days, scientists find Yahoo! VoicesA rumble echoed around the world for nine days. Here’s what caused it. The Washington PostEntire Earth vibrated for nine days after climate-triggered mega-tsunami The GuardianWe Now Know Why Earth Vibrated for Nine Days in 2023 The Wall Street Journal650-Foot High Megatsunami in Greenland Sends Seismic Waves Worldwide SciTechDaily