[2] Satellite data and imagery indicate the large part of the landslide directly above the fjord waters began sliding on August 23, 2022.

In September 2022, movement was detected in large parts of "Core" and "Prow" as well as the entire "Kite" section.

In a worst-case scenario, rapid ground failure could result in a deadly tsunami in large water bodies including Harriman Fiord, Barry Arm, College Fiord, Port Wells, Cochrane Bay, Blackstone Bay, and Passage Canal.

The tsunami would propagate at 24–40 m (79–131 ft) per second across the Prince William Sound, posing a threat to small kayaks and large cruise vessels.

The simulation used data from bathymetric maps by the National Oceanic and Atmospheric Administration and lidar imaging from the Alaska Division of Geological and Geophysical Surveys.

[5] The U.S. Geological Survey said that the tsunami hazard is not as severe as initially thought but still pose a threat to coastal settlements.