Ecuadorian authorities have been placed on alert after a 1,500-meter column of steam, gas, and ash emanated Sunday from the Cotopaxi volcano, it was reported. The National Polytechnic School's ...

UPDATE (7:50 a.m.): All lanes of Highway 50 are back open west of Canon City. PREVIOUS (8/22): Westbound Highway 50 is closed ...

Gravity monitoring at the Ecuadorian volcanoes Cotopaxi and Sierra Negra helped constrain mass movements (e.g., hydrothermal fluid migration in the case of Cotopaxi; recharge of magma below Sierra ...