Earthquake and Volcanoes — Geography STD 11 Arts — Question
Gujarat BoardEnglish MediumSTD 11 ArtsGeographyEarthquake and Volcanoes3 Marks
Question
Write a short note of the epicenter and emission center.
✓
Answer
The rapid changes in heat and pressure in the earth's crust are felt by the earth's crust.
This is called rapid geo-circulation.
Volcanic and seismic processes are rapid geo-movements, which bring about many changes in the weakly geologic regions of the earth.
An earthquake is when a weak part of the earth's surface is accidentally shaken by the action of seismicity.
Earthquakes happen suddenly, accidentally and and instantly.
The January $26, 2001$ earthquake in Bhuj wreaked havoc in a matter of minutes.
Earthquakes are a natural phenomenon.
"An earthquake is a wave that vibrates from a source of turbulence in the earth's crust."
Throwing a stone into the calm waters of a lake, like "Arthur homes", causes circular waves to spread outward from the center.
Similarly, seismic waves also propagate around the center of the vibration.
The place from which the earthquake waves are generated is called the seismic center.
The epicenter was reported below the Earth's surface, however; the epicenter was reported below the Earth's surface.
The most devastating effects of an earthquake occur around this epicenter.
The epicenter was reported at about $700 \ km$ above the earth's surface.
From there the vibrational waves begin to reach the earth's surface in a matter of seconds.
If the epicenter is at a depth of about $60 \ km$ then a shallow earthquake, at a depth of about $60$ to $250 \ km$ then a moderate earthquake at a depth of about $250$ to $700 \ km$ is called a deep earthquake.
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