A gravelly deposit was left by a sand boil near this ranch house adjacent to Big Lost River. Sand boils are caused by soil liquefaction.

1983 Borah Peak, ID earthquake: magnitude 7.3

Lateral spreading caused by soil liquefaction caused fissures to form near Highway 93 in Custer County, Idaho.

1983 Borah Peak, ID earthquake: magnitude 7.3

In Challis, Idaho, two young children died when the upper front of this old rock building collapsed onto the sidewalk as they walked to school. It's extremely important that we all learn to move away from buildings when we feel the ground shake.

1983 Borah Peak, ID earthquake: magnitude 7.3

The entire stone front exterior of the old high school separated from the rest of the building, and the northeast corner crumbled. Its 360 junior high and high school students began attending classes at the newly-built high school and an elementary school.

1983 Borah Peak, ID earthquake: magnitude 7.3

Luckily, no one was on this sidewalk in Mackay, Idaho, when the awning fell during the earthquake. This photo is a good reminder of how dangerous it may be to run outside while the ground is still shaking.

1983 Borah Peak, ID earthquake: magnitude 7.3

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