Sensitive instrument used to detect ground shaking
![A small instrument with a USGS logo sticker with wires coming out of it is in a hole in the ground.](https://d9-wret.s3.us-west-2.amazonaws.com/assets/palladium/production/s3fs-public/styles/full_width/public/thumbnails/image/BarterIs_20180705_132509.jpg?itok=8PyYvht7)
Detailed Description
This device, called a Raspberry Shake, is a sensitive instrument used to detect ground shaking. It is being carefully buried in this shallow hole in the tundra, to isolate it from wind.
Sources/Usage
Public Domain.