Are you planning a Lassen Volcanic National Park itinerary? It was one of those moments when we realized, with ...

On June 14, 1914, three men climbed Lassen Peak to see why a seemingly dormant volcano had started rumbling 16 days before. Now, peering into a newborn crater, they felt the ground tremble.

Lassen Peak is one of the largest plug dome volcanoes in the world, and its most recent violent eruptions from 1914 to 1917, photographed by B.F. Loomis, captured the attention of the nation. Lassen ...

Tucked away in far northeastern California, Lassen offers sweeping grandeur and hydrothermal ... The park's namesake peak is the one of the largest plug dome volcanoes in the world — a type of volcano ...

Most notably, the park features examples of each of the four main types of volcanoes. Its namesake feature, the 10,457-foot Lassen Peak, is one of the world's largest lava dome-type volcanoes and ...

The Volcanic Explosivity Index (VEI ... VEI-3 are catastrophic eruptions that happen every few months. Lassen Peak in Northern California had a VEI-3 in 1915. VEI-4s happen about every other ...