Describe What Happens During an Earthquake

To fully understand what happens during an earthquake its essential to understand whats going on miles underneath your feet. Seismic shadowing occurs on the opposite side of the Earth from the earthquake epicenter because the planets liquid outer core refracts the longitudinal or compressional while it absorbs the transverse or shear waves.

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The strain becomes so great that rocks give way by breaking and sliding along fault planes.

. If you are near the shore drop cover and hold on until the shaking stops. Groundwater extraction decrease in pore pressure. As the P-wave passes each seismic station its arrival time is detected and noted by the real-time computers.

Earthquakes are caused by sudden movement in opposing tectonic plates in the earth. The fastest waves the P-wave travels outward at a speed of about 3 to 5 milessecond. Rocks on either side of a fault are locked in place by friction.

The movement releases stored-up elastic strain energy in the form of seismic waves which propagate through the Earth and cause the ground surface to shake. Most people are familiar with the sinuous-looking ropy pahoehoe lava pronounced pah-HOY-hoy. Fault slips suddenly releasing stress Like a stretched rubber band.

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. No earthquakes Seismic quiescence. An earthquake is caused by a sudden slip on a fault.

P waves or primary waves are the first waves to be detected. Walk out carefully watching for anything that could fall during the aftershocks. Earthquakes can cause serious destruction to property injury to people and even kills.

The surface where they slip is called the fault or fault plane. When the stress exceeds the strength of the rock the rocks will fault. During an earthquake however there are several effects that may be damaging other than what happens when the ground shakes.

The rest of the plate remains in motion putting stress on the sticking point and when it gives way an earthquake occurs. They indicate the motion of molten rock beneath the surface. Earthquake refers to a sudden violent shaking and vibration of the earth surface resulting from underground movement along a fault plane or from volcanic activity.

Liquefaction takes place when loosely packed water-logged sediments at or near the ground surface lose their strength in response to strong ground shaking. Describe the key elements of what happens to rock before during and after an earthquake in the elastic rebound theory. Describe the key elements of what happens to rock before during and after an earthquake in the elastic rebound theory.

Not only are you unlikely to escape the radius of a major earthquake but large cracks strong shaking and fallen power lines debris glass gas leaks etc. Earthquakes are the result of sudden movement along faults within the Earth. As plates move against each other sometimes the rocky edges catch against one another.

Volcanic eruptions are usually heralded by earthquake swarms. During an earthquake seismic waves propagate in all directions from the hypocenter. Are a recipe for disaster when youre on foot.

Usually not felt but can be recorded by seismograph. May cause a lot of damage in very populated areas. It happens when there is sudden movement or breaking of the tectonic plates.

What are the 10 causes of earthquake. IT DESCRIBES THE BUILD UP AND RELEASE OF STRESS DURING AN EARTHQUAKE. The location below the earths surface where the earthquake starts is called the hypocenter and the location directly above it on the surface of the earth is called the epicenter.

If severe shaking lasts 20 seconds or more immediately evacuate to high ground as a tsunami. Describe what happens to the tectonic plates along a transform boundary at the moment when the earthquake occurs. Slight damage to buildings and other structures.

An earthquake is the result of a sudden release of stored energy in the Earths crust that creates seismic waves. An earthquake is caused by tectonic plates getting stuck and putting a strain on the ground. British Columbia sits on the western edge of the North American tectonic plate an enormous expanse of rock that floats on the magma in the center of the Earth.

The result is a split in the crust called a fracture zone that extends across the seafloor far beyond the small transform that created it. The tectonic plates are always slowly moving but they get stuck at their edges due to friction. These are compressional waves that push and pull as they move through rock and fluids.

Can totally destroy communities near the epicenter. Liquefaction occurring beneath buildings and other structures can cause major damage during earthquakes. When you are in the car you should avoid leaving it unless remaining in the car puts you at immediate risk.

Once an eruption is about to happen the volcano can spew out lava in two forms plus ash and heated gases. When two tectonic plates are passing one another the amount of. When an earthquake occurs seismic waves are created which propagate away from the focus or hypocenter.

Rocks will slowly deform over time. 1 point for a correct description of the movement of plates when an earthquake occurs A large amount of energy is rele ased Plates suddenlyrapidly slide past each other in opposite directions ii Describe what happens to the tectonic plates along a transform boundary during. Transform boundaries connect to perpendicular divergent and sometimes convergent boundaries on both ends giving the overall appearance of zig-zags or staircases.

One of these effects liquefaction is particularly bizarre to. It touches the smaller Juan de Fuca plate and they are constantly. Moment when the earthquake occurs.

An earthquake is what happens when two blocks of the earth suddenly slip past one another. Tectonic plates along a transform boundary slide past each other in opposite directions and when the pressure build up is extremely large an earthquake is caused. When an earthquake occurs different types of energy waves are generated.

Often felt but only causes minor damage. Outside the seismic shadow zone both types of wave can be detected but. Groundwater increase in pore pressure.

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