what is Plenian eruption? What is Co-ignimimbrite? From the thermal Infraded GEOS-3 Images at 8050 Pacific time there is a -65 degree celcius temperature reading in the column. Is this accurate? Explain to me what happened to produce this reading

Amber

A Plinian eruption is explosive, sending a cloud of ash high above the volcano. See the description in the background information (http://volcano.und.edu/vwdocs/vwlessons/kinds/kinds.html). Co-ignimbrite refers to ash derived from pyroclastic flows, clouds of hot ash and gas, as they descend the flank of a volcano. Coignimbrite deposits might be found above or below the deposit of the main pyroclastic flow. The second question is confusing. Where is it from. The -65 might be the temperature high in the atmosphere after the ash has mixed with a lot of air.

Sincerely,
Steve Mattox

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