Lava dome measurements of angles and slope distances using a theodo...

Lava dome measurements of angles and slope distances using a theodo...

Detailed Description

An increase in deformation rates is an indication that magma is slowly entering the dome. In the early 1980s deformation rates often reached 30 feet per hour (10 meters/hour) as magma rose and the dome expanded before extrusion started. During the winter months, the instrument stations often had to be dug out of the snow before measurements could be made.

Details

Image Dimensions: 3072 x 2048

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