On average, super-eruptions with total eruptive masses of at least 1015 kg (Toba eruptive mass = 6.9 × 1015 kg) occur every 1 million years.
I genomsnitt sker super-utbrott med totalt eruptiva massor på minst 1015 kg (Tobas eruptiva massa var 6.9 × 1015 kg) en gång på 1 miljon år.