Glacier Peak eruption history for the past 15,000 years.

Known eruptive episodes at Glacier Peak during the past 15,000 years. Each episode (depicted by a single icon) represents many individual eruptions. The ages of these episodes, in calendar years before present are corrected from dates based on a radiocarbon time scale. The uncorrected radiocarbon ages for these episodes are 11,00, 5,100, 2,800, 1,800, 1,100, and 300 years before present.