The 1600 eruption had a volcanic explosivity index of 6 and is considered to be the only major explosive eruption of the Andes in historical time. It is the largest volcanic eruption throughout South America in historical time, as well as one of the largest in the last millennium and the largest historical eruption in the Western Hemisphere. It was larger than the 1883 eruption of Krakatau in Indonesia and the 1991 eruption of Pinatubo in the Philippines. Huaynaputina's eruption column was high enough to penetrate the tropopause and influence the climate of Earth.