Volcanic eruptions are fascinating,yet very much dangerous. But do we know the after effects of volcanic eruptions? Probably not. Well,let’s get to see them,shall we?
- What are volcanoes?
Imagine you have kept a container filled with water , presumably to boil. After some time some bubbles start to arise. A volcanic eruption is similar to this. Our planet has three layers on it. The thin outer layer,the crust is the slightly cooler layer of the earth,on which we live! The second layer is the mantle,this layer is a bit thicker and considerably warmer than any of the layer. Which is just because the crust is so thin. The mantle is so thick that it’s divided into two parts. Nothing complex,namely upper mantle and the lower mantle. We humans have still not managed to crow even the starting point of the lower mantle. What could possibly be the reason? Well, firstly as you go deeper and deeper into the layer of earth,the temperature rates increase. Secondly,we just don’t know what awaits us inside the mysterious layers of earth! The next layer is the core,which is still burning,with hot magma and many different gases and chemicals. So,when the earth is cooling down,the core releases some magma through some vents,or maybe fissures,and that’s when volcanic eruptions take place. A lot of geographic explanation,but ya,worth that’s pretty much it.
Photo by Pixabay
Where can a volcano be? Volcanoes are usually found around the tectonic plates of earth (these plates keep on moving which usually causes various natural disasters). In fact, volcanoes come first in the list on the terms of natural pollution,releasing the various poisonous gases and the flaming hot lava(confused between lava and magma? Well,magma is the burning hot liquid inside the earth,but when magma is released into the crust,it gets a whole new name which is lava. Vague? I know) Which places can this volcanoes be? Anywhere! In the sense,on the sea beds,some places,rising above the sea levels,on terrestrial lands,ya they got their preferences. But we are interested in what happens after the explosion. Many consequences occur after the explosion of a volcano. Two of them,being weirdly very much fascinating.
- Limnic eruptions
Suppose a volcano has erupted inside the the sea bed. Does it have any medium to provide its gases? Nah,not really. So,what does happen? They accumulate of course! The mechanism through which the meantime water travels is,the water in the lower region travel upwards and the water in the upper region travel downwards.Confusing? Very much so. Anyways, mostly the gas which is released by the volcano is CO2 gas. CO2 gas is denser than air,so it gets accumulated inside the marine water than directly getting whiffed off into the air. Eventually,when the gas can no longer sustain inside,it explodes. And don’t think it to be a mild explosion. As a prior warning,before these types of explosion,the marine water becomes a bit warmer than usual and smells like rotten eggs(disgusting). Why do they smell like rotten eggs? Well,it maybe due to the time period of which the CO2 stayed inside the water or maybe some reaction which included some reactive elements, specifically, sulphur. Consequences? Keeping in mind that CO2 is a green house gas,and can result in the greenhouse effect,which means global warming,it is quite dangerous. Also,breathing these gases are highly fatal. Now you may be wondering,’ But….. I exhale CO2 which means my body actually produces CO2 ,do I not? Surely breathing it would not turn out to be dangerous….right??’ Not quite.The gas we release does not have the drastic concentration which a limnic eruption has,if the CO2 concentrations are higher than 10%,they are fatal for you. Although these eruptions are quite rare,it’s not like they don’t happen at all right?
Photo by Pixabay
- Pyroclastic flow
Pyroclastic flow is when a volcanic eruption,instead of releasing lava,releases blocks,stones,gases etc. Why is this dangerous? Dangerous is quite not the word to describe it,my friend,more like lethal. What does it contain,you may ask. Pyroclastic flows basically contains a ‘high density’ of ash,volcanic base,pumice and various rock debris. This flow can occur in various conditions. Breathing these gases would be like a high-five to death itself,and I am not kidding. They are extremely destructive due to the speed through which they travel and just destroy everything which comes in their way. Note that they may also take things with them, almost like hailstones,but horizontally. The temperatures inside the flow can go as high as 700° to 1000°C . And if you get inside the pyroclastic flow,you’d potentially be steamed. Fortunately though,humans have the necessary equipments to detect if there would be any future occurences. Again,they are not that common but they exist all right.
Photo by Jordan Corrales
Also,if you reside in India,you have something less to worry. The only volcano which India holds is in the Andaman and Nicobar Islands, specifically,the Barren island. Barren island has been a dormant volcano from most of the historic periods but recently i.e in the year 2017,it started releasing smoke and some lava. Had don’t think of them so badly, because if these natural occurences had not happened,the continents would’ve never formed!