What is the name of the supervolcano in Yellowstone National Park?

The supervolcano in Yellowstone National Park is commonly called the Yellowstone Caldera.

A caldera is a broad depression formed when a volcano’s magma chamber partly empties during a massive eruption and the ground above collapses. Yellowstone’s caldera is part of the larger Yellowstone Plateau Volcanic Field, a complex volcanic system driven by the Yellowstone hotspot beneath the North American Plate.

The present caldera formed about 630,000 years ago during the eruption that produced the Lava Creek Tuff. Earlier hotspot eruptions created other large calderas, including the approximately 2.08-million-year-old Huckleberry Ridge Caldera. The Yellowstone system therefore includes more than one caldera, although “Yellowstone Caldera” is the standard name for the most recent and best-known one.

People sometimes use “Yellowstone supervolcano” or “Yellowstone Plateau Volcanic Field” as synonyms, but those terms can describe the broader volcanic system rather than the specific caldera. Yellowstone is still volcanically active, with lava flows, hydrothermal explosions, earthquakes, and ground deformation, yet monitoring agencies do not consider a major eruption imminent.