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Spider Unit and 2014 Washington Landslide

Detailed Description

The photograph shows a spider unit being deployed by helicopter to help study the landslide that occurred in northwest Washington on March 22, 2014. Spiders are portable instrumentation packages that contain high-precision GPS units for detecting landslide movement as well as geophones for detecting small vibrations. Data from the spider units are transmitted by radio to USGS computers and made available to the monitoring team.


Public Domain.