The Different Kinds of Volcanoes. Many people think that there is only one type of volcanic eruption because they are all so bad, but there are a couple. A warning sign of eruption involves magma moving into the area beneath the volcano and collecting in a magma chamber. As it moves closer to the surface the lava gives off many gases. Gases given off near the volcano can be measured for changes in quantity and make up.
Volcanoes can cause many different problems.
Lava, ash and debris flows are the most common and serious volcanic hazards but severe eruptions can disrupt the climate for long periods or cause atmospheric shock waves. Eruptions can also cause tsunamis, volcanic earthquakes or the release of suffocating gases into the air. These hazards pose serious threats to both life and property. When a volcano comes to life, a few weeks may not be enough time to avert a tragedy. Planning is the to saving people.