The recent earthquake swarm near Santorini has brought the topic of volcanoes in Greece back into the spotlight.

An active volcano near Alaska's most populated city could be on the brink of eruption, according to scientists who are constantly monitoring a potential threat.

The Hawaii Volcanoes National Park Service encouraged people to stay away from the volcano’s enclosed area, since "high levels of volcanic gas and strands of volcanic glass are among the hazards." The ...