What Is Earthquake Occurrences What Is An Earthquake Year 3

An earthquakes most intense shaking is often felt near the epicenter.

Earthquake in samoa just now. If the earthquake is beneath the ocean it can create a huge tidal wave called a tsunami. An earthquake is the shaking and vibration of the earths crust due to movement of the earths plates plate tectonics. Eventually it becomes so great that the energy is released which creates a shock wave an earthquake.

Earthquake any sudden shaking of the ground caused by the passage of seismic waves through earths rocks. This photograph shows the san andreas fault a 750 mile long fault in california. For example in the 1964 alaska earthquake soil liquefaction caused many buildings to sink into the ground eventually collapsing upon themselves.

In california there are two plates the pacific plate and the. Learn more about the causes and effects of earthquakes in this article. Earthquakes occur most often along geologic faults narrow zones where rock masses move in relation to one another.

An earthquake is caused by a sudden slip on a faultthe tectonic plates are always slowly moving but they get stuck at their edges due to friction. Earthquakes can happen along any type of plate boundary. When the stress on the edge overcomes the friction there is an earthquake that releases energy in waves that travel through the earths crust and cause the shaking that we feel.

The types and nature of these waves are described in the section seismic wavesbecause the size of earthquakes varies enormously it is necessary for purposes of comparison to compress the range of wave amplitudes. There are two main ways to measure the power of an earthquake. Another meadure is the mercalli scale and this is based on peoples observations during an earthquake.

The location where an earthquake begins is called the epicenter. Earthquake magnitude is a measure of the size or amplitude of the seismic waves generated by an earthquake source and recorded by seismographs. An earthquake is the sudden movement of earths crust at a fault line.

An earthquake of 3746 every year an earthquake of 4755 every 10 years and an earthquake of 56 or larger every 100 years. In the low seismicity united kingdom for example it has been calculated that the average recurrences are. This is an example of the gutenbergrichter law.