User:Mikenorton/Sandbox5

The 1959 Madison Canyon landslide occurred on the evening of August 17, triggered by the 1959 Hebgen Lake earthquake. It blocked the Madison River, forming Quake Lake. 26 people who were camping in the area were killed.

Earthquake
The earthquake struck at 11:37 Mountain Time (06:37 UTC on August 18). It had a magnitude of 7.3-7.5 on the moment magnitude scale and a maximum perceived intensity of X on the Mercalli intensity scale. It caused numerous landslides in the epicentral area, of which the Madison Canyon landslide was the most destructive. A total of 29 people were killed, 26 being caused by the Madison Canyon slide and three others by rockfalls in other areas.