write about earthquake in 500 words
Answers
Explanation:
Earthquakes
Earthquakes Earthquakes, one of the most destructive natural phenomena, consist of rapid vibrations of rock near the earth's surface. Because of their unpredictable occurrence and enormous capacity of destruction, they have brought fear to mankind since ancient times. A single shock usually lasts no more than a few seconds, but a series of smaller quakes may last for as long as five minutes. The quake felt on the surface is always the result, not the cause of some underground geologic process, and in many cases the damage done is immense. The Greek word for shaking, and (when applied to the earth) earthquake, is seismos. Therefore, the science of earthquakes is called seismology
Explanation:
An earthquake in simple words is shaking of the earth. It is a natural event. It is caused due to the release of energy, which generates waves that travel in all directions.
An earthquake—a sudden motion of a part of the earth caused by an abrupt release of slowly accumulating stress—is a potent natural hazard. Although more infrequent than other types of natural disasters, an earthquake can cause devastation and loss of life on a scale far greater than any other individual natural hazard and is, therefore, generally regarded as the most destructive of the various forces of nature.
Earthquakes are shock waves that are transmitted from an epicenter, which can extend from the surface to 700 km beneath the Earth’s crust. Earthquakes generate a number of types of waves, viz., P-wave (compressional wave), S-wave (pro-pagational wave) and L-wave (long wave). The P-waves spread out from the centre of the earthquake. It consists of alternating compression and dilation.
The S-wave behaves very much like the propagation of a wave down a skipping rope that is being been shaken up and down. L-waves trapped between the surface of the earth and the crustal layers lower down, and spread slowly outwards from the epicenter along the surface of the globe.