Listen to a Podcast About Volcanology

Explore the science of volcanic eruptions — magma chambers, tectonic hotspots, supervolcanoes, pyroclastic flows, and how monitoring technology helps predict the next big blast.

The 1815 eruption of Mount Tambora in Indonesia, the largest volcanic eruption in recorded history (rated VEI-7), ejected 160 cubic kilometers of material and caused the "Year Without a Summer" in 1816, with global temperatures dropping 0.4-0.7 degrees Celsius, crop failures across Europe, and Mary Shelley writing "Frankenstein" during the gloomy weather. The Yellowstone supervolcano's magma chamber lies beneath an area of roughly 72 by 55 kilometers and last erupted catastrophically 640,000 years ago, ejecting 1,000 cubic kilometers of material — though USGS scientists estimate the annual probability of a supereruption at just 1 in 730,000. Modern volcano monitoring uses seismographs, GPS ground deformation sensors, gas spectrometers, and satellite thermal imaging, allowing the successful prediction of eruptions like Mount Pinatubo in 1991, where early warning enabled the evacuation of 60,000 people.

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