Explosive Eruption Of Okmok Volcano In Alaska

Explosive Eruption Of Okmok Volcano In Alaska: "*

Scientists are using a combination of seismic and GPS instruments on the ground and weather and radar satellites in space to track the progress of the eruption. Human visual observations are limited because airborne ash obscures a view of what is happening inside the volcano's 6-mile-diameter caldera and the area is too hazardous to enter.

'We are dealing with a scientific challenge because the volcano went from very quiet to a large eruption, putting ash to high altitudes with almost no warning,' said John Power, Acting Scientist in Charge of the Alaska Volcano Observatory (AVO)."