how do volcanic eruption affect the earth surface?

Answer 1

Eruptions have many effects, both good and bad. A major eruption will blow rock, gases and ash into the air. Sometimes melted glacial water mixed with falling debris can cause mudflows in rivers and streams that are capable of sweeping away entire towns. In the short term (the time that the eruption occurs), this can be devastating. Indeed, many living organisms can die, including humans, plants, animals etc., and there can be some economical damage, including destruction of towns or villages, crops, water supplies and food resources. However, in a long period of time, through the force of erosion, volcanic material (particularly ash) will break down. This can form a very rich kind of soil, good for plant growth. Farmers in places near volcanoes can grow an incredible stockpile of good, fresh food because of the good soil.
Lava eruptions are far less dangerous than explosive ones (but lava flows can still pose as a threat). Though a lava flow is very hot and capable of burning anything in its path, it does not move very fast. These lava flows can vary in size, however, and sometimes a flow may destroy some plant life, as well as human settlements. Villages in Hawaii have been burried by lava flows, and there are articles in newspapers that show pictures of houses burning, or abandoned houses half-buried in cooled lava. But, like the explosive eruptions, when lava cools and breaks down over time, it too can form rich soils.
Ash, an aspect mentioned before, is a volcano's legacy. The ash from a major eruption can travel around the globe in a matter of days. Ash, when seen under a microscope, consists of tiny, sharp particles. These particles can be extremely harmful to the human lungs, or the lungs of any other animal, for that matter. How would you feel if your throat and insides were scratched by miniature, sharp rocks? Ash can also be the opposite of a good soil maker for farmers. If too much ash covers a field, the field is ruined, for the plants will suffocate in the layers of debris. Sometimes, like it was with Mt. St. Helens, ash can pile up on top of roofs of houses, and any roof can cave in from the weight of it (just like snow).
So really, volcanoes make up a huge part of Earth in general, and they can have mixed effects on the environment.

Answer 2

The eruption deposits lava at the site, and ash into the atmosphere.
The lava at the site will cause a permanent rock formation different than the formation prior to the eruption. The ash will fall over a large area, killing vegetation if it is still hot when it falls, and polluting the atmosphere as it stays in suspension.

Answer 3

There are the lava flowing volcanoes like Hawaii . then there the deep volcanoes as in Ecuador , A volcano Reventidor is very deep and the translation means exploding . The lava is under such pressure that when it erupts it blowies it high enough that it forms the cone is more like gravel or small rocks. The fine material is bad for your lungs and the plants.

Answer 4

A volcanic eruption releases big quantities of ash into the surroundings. The ash is highly dense and stays suspended within the surroundings for a large period of time and displays incoming gentle rays again into area, readily depriving Earth of sunshine and warmth.

Answer 5

it makes mountains