The 1980 eruption cycle made Mount St. Helens one of the most famous volcanoes in the Cascades. But it is far from the only ...

Mount Lassen, in the southern Cascades, erupted on May 22, 1915, 65 years almost to the day before Mount St. Helens. Also known as Lassen Peak, the mountain is the southernmost active volcano in ...

While there are no longer volcanoes in New England, evidence suggests there was volcanic activity hundreds of millions of years ago. Parts of the White Mountains in New Hampshire were formed by a ...

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From ocean, desert and ancient forest, to Paint Hills and snow-capped volcanoes, these are the Most Treasured Views in Oregon ...

Crater Lake is among the numerous smaller volcanoes and volcanic features outside of the 13 major volcanoes that form the ...

According to the U.S. Geological Survey, Mount St. Helens was formed during four eruptive stages beginning about 275,000 years ago and has been the most active volcano in the Cascade Range.

Mount St. Helens has been the most active volcano in the Cascade Range during the Holocene, a geologic period spanning the past 12,000 years. Mount St. Helens had a devastating eruption on May 18 ...

Sicily's Mount Etna put on a fiery show on Monday, sending a cloud of smoke and ash several kilometres into the air. Although ...