Gas Sampling around the Mount St. Helens Dome

Image shows two scientists on the slopes of Mount St. Helens with steam rising around them

Detailed Description

USGS geologists gathered samples by hand from vents on the dome and crater floor. Additionally, sulfur dioxide gas was measured from a specially equipped airplane before, during, and after eruptions to determine "emission rates" for the volcano.


Image Dimensions: 3072 x 2048

Date Taken:

Location Taken: US