The intensity recorded by the instruments measured 2.5 in Richter Scale.
In other words, the landslide felt like a 2.5 quake.
The hole is such a spectacle that it was designated a National Historic Landmark in 1966.
In the morning of the landslide the movement began so strong that they immediately evacuated the area.
The first landslide occurred seven hours later, followed by another one 1.5 hour later.
Each avalanche lasted 90 seconds.
Although loss of equipment was inevitable, because of the early warning system, no loss of lives occurred.
