Volcanoes and Wind
Oblique airphoto showing Mt. St. Helens erupting at about 1130 on 18 May 1980. View is approximately to the N. Courtesy of Austin Post, USGS. Retrieved from https://volcano.si.edu/showreport.cfm?doi=10.5479/si.GVP.SEAN198005-321050.
Written by Dr. Paul F. Karrow