Which German volcano’s eruption about 12,900 years ago created the present-day Laacher See lake?

Laacher See volcano produced the eruption about 12,900 years ago that created the present-day Laacher See lake.

The eruption occurred in the Eifel volcanic region of western Germany and formed a large caldera as magma was explosively expelled. The depression later filled with water, creating Laacher See, a lake whose name means “Lake of Laach.”

The eruption spread pumice and ash across a wide area of central Europe. Geological deposits from the event help scientists reconstruct Late Pleistocene environments and date archaeological layers. Carbon dioxide still rises through the lake’s waters in places, showing that the volcanic system remains geologically active.

Laacher See is not a classic cone-shaped mountain and is sometimes overlooked beside better-known volcanoes. The lake itself is the most visible remnant of the caldera, while the surrounding Eifel contains many other volcanic features and maar lakes.