Geologist John Ewert using a laser surveying instrument to measure distances to reflective prisms or targets installed on the flanks of Redoubt Volcano in the distance. Minute changes in distances to the targets can indicate ground deformation that may be related to subsurface magma movement. View is to the south. Photograph by R. McGimsey, May 4, 1990.
Date: May 4th, 1990
Volcano(es): Redoubt
Photographer: McGimsey, R. G.
URL: avo.alaska.edu/image/view/380
Image courtesy of AVO / U.S. Geological Survey.Volcano(es): Redoubt
Photographer: McGimsey, R. G.
URL: avo.alaska.edu/image/view/380
Please cite the photographer and the Alaska Volcano Observatory/U.S. Geological Survey when using this image.
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