Highly sensitive instruments installed deep below the ground surface yield great

Highly sensitive instruments installed deep below the ground surface yield great records of earthquakes near and far. The March 31, 2020, magnitude 6.5 Stanley, Idaho, earthquake shows up very clearly in borehole strainmeter station B944's four different sensors. To make these data easier to understand, UNAVCO annotated these graphs and created a data explainer page. Station B944 is located in Yellowstone National Park, near Grant village. Figure by Michael Gottlieb (UNAVCO).