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IMAGE 602
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Geologist John Ewert uses a theodolite to measure the dimensions of the lava dome at Redoubt Volcano. From the same installation, scientists also utilized a laser-ranging device to measure distances to reflectors. Repeated measurements of these distances allow for detection of ground deformation that may be related to volcanic activity.

Date: June 4, 1990 12:00 AM
Volcano(es):Redoubt
Photographer/Creator: McGimsey, R. G.
URL:http://www.avo.alaska.edu/images/image.php?id=602

Citation Information:
Image courtesy of AVO / U.S. Geological Survey.
Please cite the photographer and the Alaska Volcano Observatory/U.S. Geological Survey when using this image.

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Page modified: September 17, 2018 11:25
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