Earthquake

 A quake (otherwise called a shudder, quake or earthquake) is the shaking of the outer layer of the Earth coming about because of an unexpected arrival of energy in the Earth's lithosphere that makes seismic waves. Quakes can go in size from those that are excessively feeble to the point that they can't be felt to those rough enough to move articles and individuals into the air, and unleash obliteration across whole urban communities. The seismicity, or seismic action, of a space is the recurrence, type, and size of tremors experienced throughout some undefined time frame. The word quake is additionally utilized for non-tremor seismic thundering. 

At the Earth's surface, quakes show themselves by shaking and uprooting or disturbing the ground. At the point when the focal point of an enormous seismic tremor is found seaward, the seabed might be uprooted adequately to cause a tidal wave. Quakes can likewise trigger avalanches and, every so often, volcanic movement. 

In its most broad sense, the word quake is utilized to portray any seismic occasion—regardless of whether regular or brought about by people—that creates seismic waves. Tremors are caused for the most part by crack of topographical blames yet additionally by different occasions like volcanic movement, avalanches, mine impacts, and atomic tests. A tremor's place of starting break is called its hypocenter or concentration. The focal point is the point at ground level straight over the hypocenter.