GRAND RAPIDS, Mich. (WOOD) — When people think of volcanoes, they don’t typically think of Michigan. But volcanic activity was the driving force behind some of Michigan’s key resources and landmarks.

Pyroclastic density currents (PDCs) represent some of the most formidable and complex volcanic phenomena, characterised by a turbulent mixture of solid particles and gases that surge down slopes at ...

The landforms indicated with arrows correspond to old magmatic intrusive rocks that may have been ancient volcanoes in the northern Andes ~10-20 million years ago. A new study published in Earth and ...

A column of ash from the eruption of Mount Semeru on Tuesday evening, April 7, 2026, reached a height of two kilometers above the peak.