# Question: How fast do earthquakes happen?

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The rupture speed of most earthquakes tops out around 5,600 to 6,700 mph (9,000 to 10,800 kilometers per hour) which is slower than the speed at which seismic shear waves (one type of seismic wave generated by an earthquake) emanate from the epicenter of the quake.

## What is the maximum speed of earthquake?

Propagation velocity of the seismic waves through solid rock ranges from approx. 3 km/s (1.9 mi/s) up to 13 km/s (8.1 mi/s), depending on the density and elasticity of the medium. In the Earths interior, the shock- or P-waves travel much faster than the S-waves (approx. relation 1.7:1).

## Do earthquakes happen every 30 seconds?

Earthquakes are a very common occurrence. Once every 30 seconds somewhere in the world the ground shakes. The estimates are that there are about 500,000 detectable earthquakes a year, 100,000 of those can be felt, and about 100 of them cause damage.

## Do earthquakes occur quickly or slowly?

Where do earthquakes happen? Earthquakes usually occur on the edges of large sections of the Earths crust called tectonic plates. These plates slowly move over a long period of time.

## Do earthquakes happen suddenly?

Earthquakes are usually caused when underground rock suddenly breaks and there is rapid motion along a fault. This sudden release of energy causes the seismic waves that make the ground shake. Cutaway view of the reverse fault. The earthquake starts at the focus, with slip continuing along the fault.