Belly of the Beast

What Happens Beneath Volcanoes to Make Them Erupt

Volcanologist Megan Newcombe describes how scientists study volcanic ash from past eruptions to understand the guts of volcanoes and their potential for future explosive activity.

Approximately 20 of Earth’s 1,000 active volcanoes are erupting. Despite advances in volcano monitoring systems, it is still difficult to provide accurate eruption forecasts. The stakes are enormous: the 2018 eruptions of Anak Krakatau and Fuego claimed more than 600 lives. In a typical year, volcanic eruptions cause significant economic loss and displace tens to hundreds of thousands of people. To improve the accuracy of volcanic forecasts, we need to understand the mechanisms of volcanic eruptions.

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