Landslides can be triggered by small changes in atmospheric pressure

We knew earthquakes and heavy rain could initiate landslides, but now it seems alterations in atmospheric pressure can do it too if combined with certain conditions on the ground



Earth



16 November 2022

The Slumgullion landslide in Colorado has been slowly advancing for hundreds of years

Bill Schulz/USGS

Small changes in atmospheric pressure can start a landslide in certain weather conditions. Understanding why will help us to assess which slopes are at most risk of failing.

Just over a decade ago, there was huge surprise when it was discovered that the intermittent sliding of the Slumgullion landslide in the San Juan Mountains of south-west Colorado was triggered by changes in atmospheric pressure. We knew that landslides are initiated by earthquakes or heavy rains, but the …

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