Unlike other natural disasters such as floods, wild fires and earthquakes, volcanoes can have some positive effects, even though they can be very disastrous.
The effects of volcanic eruptions
Let us see some negative effects of volcanoes:
Eruptions occurring close to human settlements may spill and destroy lives and property. People often have to be evacuated.
Example: Chaparrastique volcano in El Salvador started erupting on 29 Dec, 2013. Anyone living within 2 miles of the volcano is evacuated.
Source: BBC News:www.bbc.co.uk/news/world-latin-america-25545555
Ash discharged very high into the stratosphere can have negative consequences on the ozone layer. Read more about that here.
Landscapes and natural sceneries can be destroyed.
Ash and mud can mix with rain and melting snow, forming lahars. Lahars are mudflows flowing at very fast pace.
Some positive effects of volcanoes include:
Different types of erupting volcanoes provide extraordinary scenery, so beautiful and natural that they attract tourists to the area, bringing in some economic value.
Places close to volcanic activities tend to have higher potential for geothermal energy, which can be an advantage to the towns and cities.
Some ash and lava breakdown become soils that are rich in nutrients, and become good areas for crop planting activities.
DID YOU KNOW:
El Salvador has about 20 volcanoes, and the area falls within the larger Pacific Ring of Fire (an area know for its frequent tectonic movements and earth activity). This Ring of Fire is the home of 75% of the worlds volcanoes.— Lucas de Jong, BBC
In the news: 1st February, 2014.
Mount Sinabung, jakarta, Indonesia erupted with plumes of ash spewed more than one mile into the sky. The eruption killed at least 15 people as hot ash of about 700 degrees raced down the mountains slopes in just minutes. Those affected were within 3 kilometer radius of the volcano. Full story Here