We start our exploration with the second oldest USGS observatory—the David A. Johnston Cascades Volcano Observatory (CVO) in Vancouver, Washington.
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Posted on 2:05 pm, Thursday, January 5, 2017.
We start our exploration with the second oldest USGS observatory—the David A. Johnston Cascades Volcano Observatory (CVO) in Vancouver, Washington.
Posted in Featured, Sci-Tech, VolcanoComments (0)