The extent to which volcanic processes represent hazards depends on where and when they occur.

Authors Avatar

‘The extent to which volcanic processes represent hazards depends on where and when they occur.

Discuss this statement.

A hazard can best be defined as a 'situation that poses a level of threat to life, health, property or the environment.' The overall impact of volcanoes as a natural hazard varies greatly from one place and timeframe to another. Vulcanicity is normally associated with plate tectonic processes and is mainly located along plate margins. Different plate margins known as constructive and destructive on volcanic eruptions and landforms have different effect. Volcanic activity that occurs at a destructive plate margins such as in Mount Merapi & Mount St. Helens eruption potentially could be an explosive volcanoes which are hazardous but both location have different vulnerability impact to the populace.

Volcanic processes can be found along oceanic ridges where the plates are moving apart known as constructive plate margins. Volcanic eruption that occurs on a constructive plate margins usually little violence, but the volcanic gases easily escape. Volcanic Hawaiian Islands that are not connected with any plate boundary is an active volcano, but it’s not as hazardous due to the plume of magma only rises to eat into the plate above. Volcanic processes also can be found on or near subduction zones associated with destructive plate margins. The line of volcanoes, or ‘ring of fire’ that surrounds the Pacific Ocean is associated with plate subduction. This tends to be the most violent of all activity, potentially explosive, where it can be hazardous to the public. As do the types of hazards, which are categorised into primary and secondary. Primary hazards, created by the direct vulcanicity of the volcanoes, could include tephra, pyroclastic flows & volcanic gases.  These primary hazards can in turn trigger secondary hazards such as lahars, flooding, tsunamis, volcanic landslides and it can be universal, climate change due to the ejection of vast amounts of volcanic debris into the atmosphere can reduce global temperatures. A number of factors play a part in determining the severity of these hazards. Volcanic effects become a hazard when they impact upon the human and built environments, killing and injuring people, burying and collapsing buildings, destroying the infrastructure and bringing agricultural activities to a halt.

Join now!

One of the factors that does significantly evidence that due to volcanic eruption is when it occurs will surely have an impact on the aftermath. Volcanoes on a constructive plate margin frequency of eruption usually regular and can be continuous whilst on a destructive plate margin it’s from time to time, long dormant of periods. When the volcanic eruption occurs is a factor that leads to how big the hazard from the impact of the volcano can be for example if a volcano takes place early in the morning, people isn’t really conscious and act fast to prevent themselves. ...

This is a preview of the whole essay

Here's what a teacher thought of this essay


A good answer to the question. At times it could link back the question more, and some structural issues need addressing. However the case study detail is very good.