Forecasting Ashfall Impacts from a Yellowstone Supereruption-tWYQzhCYxxM

Agung in Bali and Popocatepetl in Mexico are both rumbling back to life as we enter the Grand Solar Minimum.
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Presenter: Larry Mastin, USGS Hydrologist

• Yellowstone is one of a few dozen volcanoes on earth capable of "supereruptions" that expel more than 1,000 cubic km of ash and debris.

• The plumes from such eruptions can rise 30 to 50 km into the atmosphere, three to five times as high as most jets fly.

• Yellowstone has produced three supereruptions in the past 2.1 million years. The most recent was 0.6 million years ago.

• Eruptions this large can create their own continental- scale wind field, pushing ash more than 1,000 km against the prevailing, ambient wind field.