The last major volcanic eruption of lava at Mount Baker occurred some 6,700 years ago.
However, it is still an active volcano and there have been significant hydrothermal eruptions as recently as 1880.
Since the mid 1970s, reheating has been detected along with increased emissions of hot steam and gases from fumaroles, or vent holes, in the mountain’s Sherman Crater, but no signs that renewed magmatic activity is involved.
