SIGNS OF AN IMPENDING VOLCANIC ERUPTION

Scientists observe a volcano's behavior to try to determine when it will erupt. The importance of studying warning signs can help prevent potential human loss. By examining clues, scientists can develop a course of action and evacuation plan for people that live within the vicinity of an impending volcanic eruption.

"These signs may include very small earthquakes beneath the volcano, slight inflation, or swelling, of the volcano and increased emission of heat and gas from vents on the volcano," U.S. Geological Survey (USGS) Volcano Hazards Program coordinator John Eichelberger, said.

To prevent damages people need to prepare from incoming or impending volcanic eruption, there is normally an increase in earthquakes and tremors near and under the volcano. These are caused by magma no erupts(molten rock) pushing upward through the rock under the volcano. The ground may crack open and allow steam to escape.