Over the Sierra crest — about 150 miles to the east of Manteca, Oakdale, and Turlock — is one of the world’s largest active ...

An explosion on Mount Spurr could generate massive cloud of ash, which could mess with airplanes and cause issues for humans.

We took on one of the most intense crawls of our caving adventures – squeezing through tight passages deep inside Pettyjohn Cave to reach the legendary Volcano Room. It was a journey filled with low ...

Rescuers followed footprints in the snow to find a weary and lost person after their cellphone died on Mount St. Helens over ...

For a pilot, the first signs of flying into an ash cloud can include sudden darkness, fluctuating airspeed, and landing ...

A pair of 2021 satellite photos highlight an unusually heavy snowfall in Hawaii that covered the summits of the volcanoes ...

Olive Mullet reviews the book 'Adventures in Volcanoland' by Tamsin Mather in the latest Up and Down the River column ...

Since Iceland is expected to enter a period marked by more frequent eruptions, increasingly reliable volcano warnings are needed now more than ever. “There is a lot more work to do, and all volcanoes ...

The temperatures will be in the upper 40s to low 50s by the afternoon, so early day snow riding will be best. The is a very small chance for an isolated thunderstorm Saturday, but mainly east of ...

A comprehensive inventory of rivers on Alba Mons on Mars reveals a prolonged history of erosion and development into mature ...