Volcanicity and Seismic Seismic events are cause and effect for each other. Justify this statement by highlighting some common cause and effect of both.
Answers
Answer:
Volcanic activity is the most powerful force in nature. Some volcanic eruptions are much more powerful than the largest nuclear explosion. Volcanoes have killed thousands of people and have created some of the most frightening events in human history.Volcanoes have been the basis for myths and legends the world over. Volcanoes are also responsible for much of the land we live on, 90% of all the continents and ocean basins are the product of volcanism. The air we breathe, and the water we drink have been produced by millions of years of eruptions of steam and other gases.The word volcano is derived from the name of the ancient Roman island of Vulcano which lies off the southwest coast of Italy.
Answer:
Fault is a sharp break in the crustal rocks. Rocks along fault tend to move in opposite directions. As the overlying strata press them, the friction locks them together. However, their tendency to move apart at some point of time overcomes the friction. Hence, blocks get deformed and slide one past another abruptly, causing release of energy as seismic waves through all directions. The body seismic waves travel through the Earth's body and interact with surface rocks causing surface waves, these are destructive.
Now, volcanic materials reach Earth's surface through the mantle's weak Asthenosphere and deformed crustal structure due to seismic activities.
According to the "Sea floor spreading hypothesis", Hess argued that constant magmatic activities increase kinetic energy within sea rock molecules, leading to ruptures through which magma passed on sea floors. During the movement of the Indian plate towards the Eurasian plate, volcano occurred due to seismic activities of plates passing over one another and creating faults.
Both seismic and volcanic activities cause ground shaking, liquefaction and displacement, land and mud slides, floods, fires, collapses, loss of life and property.
Hence the above statement is justified.