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Be sure to know all of your vocab words

What is the relationship between an earthquake's focus and its epicenter?

What's the relationship between plate boundaries and earthquake locations?

A majority of the earthquakes in the world occur along the tectonic plate boundaries. Most of the earthquakes in the world occur along the plate boundaries that surrond Pacific. Earthquakes occur along these boundaries because the movement of the plates can transfer energy to the rocks. The rocks move suddenly along a fault and release energy causing the earthquake. After the earthquake the energy decreases because of elastic rebound.

divergent pulled apart tension normal faults

transform slide past other shear stress strike-slip faults

What is the relationship
between earthquakes and a tsunami.
Tsnamis occur from earthquakes that happen under the ocean floor.

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Displaced creating extremely long waves that can travel outward like the seismic waves from a land earthquake, Waves increase as they reach the shore can be as high as 30 m. They can smash and destroy anything in their path and many lives are lost from coulmns.

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Danger to people and structures
Tsunamis
from the epicenter of the earthquake with the stongest being at the epicenter and the waves are weaker the further from the epicenter. Structures will move and may not be able to withstand the movement and collapse. Most injuries occur from these collapses. Other factors are fires, gas leaks, floods and polluted water.

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At these boundaries, plates slide past eachother horrizontally. Stress at these boundaries is caused by pushing different parts of the body in opposite directions.
As the rocks move on both sides of the fault they get broken as they grind past one antoher, Strike-slip faults are common at these boundaries. THey are shallow like divergent.

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Two plates collidge causing rock to be squeezed. This stress is called reverse faults. Rocks are thrust over one another. Two things can happen at reverse faults. FIrst the plates may crumble up to form mountains second one plate can subduct or sink underneath the other into the mantle. Earthquakes on or near these faults are deep and tend to be very strong.

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The plates move away from each other. Stress from stretching makes the rock thinner. This tension creates faults. Because the crust is thin near these boundaries, earthquakes tend to be shallow. A mid-ocean ridge is an example of divergent boundary where earthquakes occur.

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Most earthquakes form at or near at or near tectonic plate boundaries. On a map, they are concentrated along the edges of Pacific Ocean where many volcanoes are also located. Earth's crust experience a lot of stress because the plates are colliding, separting

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\ When there is movement of tetonic plates aions long a fault rocks along the underground fault suddenly move and release energy, the movement causes vibrations (seismic waves) to race rapidly outward in all direct from the focus. The point at ground level directly above the focus called the epicenter.

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When a break line (the fault) between two blocks of rock suddenly moves, the movement causes vibrations (seismic waves) to race rapidly outward in all directs from the focus. The point at ground level directley above the focus is called the epicenter.