Kalae ash deposits are 13,000, 26,000, 28,000 and more than 49,000 years old. The ash deposits also vary in thickness from 0.1 feet to 18 feet.

Ashfall in Sand Point airport is probably to blame, according to Rick Wessels. He's a geophysicist for the Alaska Volcano Observatory, and he's monitoring Pavlof, which has been sprinkling ash on ...

Researchers will conduct a two-year study of underwater sand deposits off St. Simons, Sea Island and Jekyll Island that could be used to replenish beaches in the event of erosion from hurricanes. C… ...

Volcanic ash can damage jet engines, and volcanologists have developed a new empirical model for assessment of the risk. Their results show that tests using sand do not reflect the behavior of ash ...

Scientists have found previously undocumented ash deposits buried beneath the Lava Creek Tuff in Wyoming — and at least one of them could be from an unknown volcanic eruption, they say.

Scientists have found previously undocumented ash deposits buried beneath the Lava Creek Tuff in Wyoming — and at least one of them could be from an unknown volcanic eruption, they say.

Survivors of one of New Zealand’s worst natural disasters have described the searing pain of being lashed by burning sand, ash and rocks during a volcanic eruption on Whakaari or White Island in ...