For decades, volcanologists believed that the primary trigger for explosive eruptions was a drop in pressure as magma rises toward the surface. When pressure falls, gases dissolved deep within the ...

POPOCATÉPETL VOLCANO, Mexico — In the predawn darkness, a team of scientists climbs the slope of Mexico’s Popocatépetl volcano, one of the world’s most active and whose eruption could affect millions ...

Scientists from China, the UK and the U.S. have collaborated to analyze the inner workings of Bolivia's "zombie" volcano, Uturuncu. By combining seismology, physics models and analysis of rock ...

Glowing lava bubbled inside volcanic vents as molten rock overflowed intermittently at the summit of Kilauea volcano in ...

Add Yahoo as a preferred source to see more of our stories on Google. Marco Calo, left, a geophysicist at the National Autonomous University of Mexico (UNAM), take a break on the slopes of the ...

POPOCATÉPETL VOLCANO, Mexico — In the predawn darkness, a team of scientists climbs the slope of Mexico's Popocatépetl volcano, one of the world’s most active and whose eruption could affect millions ...

In the predawn darkness, a team of scientists climbs the slope of Mexico's Popocatépetl volcano, one of the world's most active and whose eruption could affect millions of people. Its mission: figure ...

What's Inside Mexico's Popocatépetl? Scientists Obtain First 3D Images of the Whole Volcano POPOCATÉPETL VOLCANO, Mexico (AP) — In the predawn darkness, a team of scientists climbs the slope of Mexico ...

For five years, the group from Mexico’s National Autonomous University has climbed the volcano with kilos of equipment, risked data loss due to bad weather or a volcanic explosion and used artificial ...