2024年1月8日 · Yellowstone caldera is gigantic—about 70 by 45 kilometers (43 by 28 miles). In the language of volcanology, a small collapse—perhaps a few hundred meters (yards) across—is a crater. But a large collapse—generally more than 1 kilometer (0.6 mile) across—is a caldera. Guidelines are vague for the size of a crater versus a caldera.

The meaning of CALDERA is a volcanic crater that has a diameter many times that of the vent and is formed by collapse of the central part of a volcano or by explosions of extraordinary violence. Did you know?