Ash released from shield volcanoes often builds up around the vent forming a steep, round hill known as a cinder cone. A lava tube may also form, beneath the surface of the ground, when low ...

As they turned and ran down the steep slope, the mountain erupted ... Three days later, a huge mass of ashes and gases shot out of the volcano, devastating a swath a mile wide and three miles ...

Jasmin added, "Beyond that, we weren't ready for the reality of it." Reality hit the pair quickly, given the volcano's steep incline and high altitude. "Seriously—five minutes! The incline hit ...

Expansive lava flows in the Sáttítla Highlands was captured by satellites ahead of the recent designation of the area as a national monument.