Final answer:
Common warning signs of an imminent volcanic eruption include increased seismic activity, gas emissions, changes in ground deformation, changes in volcanic activity, and changes in volcanic gas composition.
Step-by-step explanation:
Volcanic eruptions can be preceded by several warning signs that indicate an imminent eruption. Some common warning signs include:
- Increased seismic activity: Earthquakes and tremors may indicate the movement of magma beneath the surface.
- Gas emissions: The release of gases such as sulfur dioxide and carbon dioxide can increase before an eruption.
- Changes in ground deformation: Bulging or inflation of the volcano's shape may suggest the buildup of magma.
- Changes in volcanic activity: Increase in steam vents, hot springs, or changes in the activity of fumaroles can indicate an impending eruption.
- Changes in volcanic gas composition: A shift in the types and amounts of gases being released may suggest a change in the volcano's behavior.
It is important to note that not all volcanic eruptions exhibit the same warning signs, and monitoring systems are in place to help detect and interpret these signs.