Helicorders on display at the University of Alaska Fairbanks Geophysical Institute ~2003. Helicorders record seismic signals from seismometers by drawing lines on paper wrapped around a rotating drum. Each line of data represents a specific amount of time. Photo by Michael Doukas, USGS.
Date: August 4, 2003
Volcano(es):
Photographer: Michael Doukas
URL: avo.alaska.edu/image/view/6655
Credit: Image courtesy of AVO/USGS.
Full Resolution.
Volcano(es):
Photographer: Michael Doukas
URL: avo.alaska.edu/image/view/6655
Credit: Image courtesy of AVO/USGS.
Full Resolution.
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