Mega tsunamis in Greenland fjord confirmed as source of nine-day global seismic signal
A persistent, ultra-low frequency seismic vibration was detected worldwide in September 2023 and traced to Dickson Fjord, East Greenland, after two large landslides triggered tsunamis and a long-lasting seiche. For the first time, researchers directly observed this standing wave using NASA’s SWOT satellite mission, providing new insights into the connection between global seismic signals and surface water motion in remote coastal environments.
