The main negative impact would be the destruction of properties and casualties.One way is to aim a piezoseismic directional optical telescope down into the ground to detect any strains, pressure and flow of lava. This would give an early warning to people and there is more time for a mass evacuation. Evacuation is another way in lives are saved. However, property would be damaged.Alot of money will be needed to rebuild homes and offices.But, this cannot be avoided.Even if we live in it when the volcano is going to erupt, we would just be burnt to death by the lava. Major losses of life and property can be avoided with careful planning along with an effective warning and evacuation procedure.
Constant monitoring of a volcano would help to warn people. The country should take initiative to educate people about the dangers of volcanic eruptions. By educating the public, the public would have a better understanding and would be more cooperative in evacuating.Since they do not have prior knowledge about volcanoes, one would stay at his/her house and safeguard it. It is natural to do so.
http://wiki.answers.com/Q/You_do_to_reduce_the_negative_impact_of_volcanic_eruptions#ixzz1HVFvZXbP
http://library.thinkquest.org/17457/volcanoes/effects.php
http://www.blurtit.com/q238596.html
