GPS benchmark installation just below crater of Mount St. Helens.
Detailed Description
Epoxy is used to cement a permanent survey marker at a field location just below the crater of Mount St. Helens (north flank). The benchmark is used to create a fixed location for future GPS surveys.
Sources/Usage
Public Domain.
Related Content
Deformation Monitoring at Mount St. Helens
Studying the ground surface movement around a volcano (also called deformation) can give clues to what is happening beneath the surface.
Related Content
Deformation Monitoring at Mount St. Helens
Studying the ground surface movement around a volcano (also called deformation) can give clues to what is happening beneath the surface.