Experiences with smaller eruptions are “scaled up” to assess impacts of larger events--but there are big problems unresolved....

Time and Place    LIPS     Caldera    Convection    Sulfur    Ash    Scale   Global   Forecast  Discover

Although Pinatubo’s 1991 eruption was large enough to cause a detectable three year global surface temperature decrease, it erupted far less than one percent of the volume of a Yellowstone eruption. It is challenging to try to scale the global impact by orders of magnitude from the rather weak global effects of Pinatubo.


12 June 1991

USGS   Dave Harlow

Pinatubo Crater