Eruptions of the St. Augustine Volcano: Airborne Measurements and Observations

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Science  04 Mar 1977:
Vol. 195, Issue 4281, pp. 871-873
DOI: 10.1126/science.195.4281.871


Airborne measurements of the effluents from the St. Augustine volcano obtained during a 10-day period of activity showed that aerosol was ejected at the rate of about 105 kilograms per second during brief eruptions (3 to 8 minutes). Steadier emissions contained much more water vapor and gaseous sulfur but less aerosol mass. A nuée ardente (glowing avalanche) produced by one eruption reached a maximum average speed of about 50 meters per second.