Trying to identify why Lassen Peak and vicinity is sinking is a little tricky. As I just alluded, the most likely culprit is cooling and crystallizing of magma after the 1914-17 eruptions of ...

Lassen Volcanic National Park . One hundred years ago, a mere geologic eye blink, tectonic plates did a little twerking, and Lassen Peak roiled and rumbled, bubbled and blew. Boulders the size of ...

Lassen Peak is the pinnacle for Lassen Volcanic National Park and is the southernmost volcano of the Cascade Range. Visitors come from around the world to hike it.

Lassen Peak last erupted in 1917, and is considered to be the most likely volcano in the Cascade Range to erupt within the next 100 years. Lassen Peak last erupted in 1917, ...

Lassen Peak erupted 103 years ago today, exploding in a way California would never forget. It's a reminder of the eight volcanoes that are at the highest threat of eruption in the state.

Lassen Peak was the only volcano to erupt inside the borders of the United States until 1959, when Hawaii and Alaska were added to the union. That first, small eruption of May 30, ...

Lassen Peak as seen from the Devastated Area, named as such after being destroyed during the 1915 eruption. All the trees in the foreground have grown since that event.

Lassen Peak’s elevation and geographic orientation lead to the area’s heavy snow numbers, according to the National Weather Service’s Sacramento office.