Around the same time, a massive volcanic eruption in the Wrangell Mountains in Alaska occurred, blanketing the area in a layer of ash, up to a foot deep, called the White River tephra.

Volcanic eruption facies and flooding facies are extensively developed in the Sihetun area, west Liaoning.

From the relationship between the landslide area and the surrounding stratum and the history of the volcano eruption, it is suggested that the submarine landslide is triggered by the earthquake.