Geological Shifts and Tsunami Protocols in Tracy Arm Fjord
Glacial retreat destabilizes fjord walls. Recent scientific surveys of Tracy Arm, a narrow, glaciated waterway southeast of Juneau, reveal an increased probability of localized tsunamis generated by massive rockfalls. On August 10, 2025, a 64-million-cubic-meter rockslide triggered a 1,500-foot displacement wave, registering locally as a 5.4 magnitude seismic event. A tour vessel narrowly avoided the…