What causes earthquakes?

Question

I will like you to answer this by sunday, because this is for science.

Answer 1

1. Tectonic earthquake
The Earth's lithosphere is a patchwork of plates in slow but constant motion caused by the release to space of the heat in the Earth's mantle and core. The heat causes the rock in the Earth to flow on geological timescales, so that the plates move slowly but surely. Plate boundaries lock as the plates move past each other, creating frictional stress. When the frictional stress exceeds a critical value, called local strength, a sudden failure occurs. The boundary of tectonic plates along which failure occurs is called the fault plane. When the failure at the fault plane results in a violent displacement of the Earth's crust, energy is released as a combination of radiated elastic strain seismic waves, frictional heating of the fault surface, and cracking of the rock, thus causing an earthquake.

2. Volcano tectonic earthquake
An earthquake induced by a movement of magma. The movement results in pressure changes in the rock around where the magma has experienced stress. At some point, the rock may break or move.

3. Others
Caused by meteor impact, building colaps or landslide

Answer 2

Earthquake is a shaking of the ground caused by the sudden breaking and shifting of large sections of the earth's rocky outer shell.
In other words,earthquake is a natural movement of the ground,originating below the surface,due to the build-up and sudden release of strain energy in a small underground region,termed the 'focus' or 'hypocentre' of the earthquake.

Answer 3

An earthquake is the consequences of a surprising launch of capability in the Earth's crust that creates seismic waves. Earthquakes are recorded with a seismometer, additionally regular as a seismograph. the 2d value of an earthquake is conventionally suggested, or the appropriate and often out of date Richter value, with value 3 or decrease earthquakes being often imperceptible and value 7 inflicting extreme harm over super factors. intensity of shaking is measured on the changed Mercalli scale. on the Earth's floor, earthquakes take place themselves by way of a shaking and each so often displacement of the floor. whilst a extensive earthquake epicenter is located offshore, the seabed each and every so often suffers sufficient displacement to reason a tsunami. The shaking in earthquakes could additionally set off landslides and now and returned volcanic interest. In its maximum widespread experience, the be conscious earthquake is used to describe any seismic adventure—no remember if a organic phenomenon or an adventure brought about by way of people—that generates seismic waves. Earthquakes are brought about often by way of rupture of geological faults, extensive quantities of gasoline migration, particularly methane deep in the earth, yet additionally by way of volcanic interest, landslides, mine blasts, and nuclear experiments. An earthquake's component of preliminary rupture is noted as its concentration or hypocenter. The term epicenter skill the component at floor point immediately above this .

Answer 4

There used to be this theory called Pangea that all the continents "were" connected, but it turns out this is jibberish and that the entire earth is connected. Right now..and that the continents aren't just floating around like lilly pads on top of water. It's just that the water runs down to fill in the low places. Underneath the water giant tectonic plates are shifting about argumentatively about who gets to let out the heat crushing a planet beneath you makes. Now and then one giant piece of this earth-skin wins out with a substantial nudge that can create quite the annoyance for everyone living on top of them, these quakes in the earth.

Answer 5

Do a Google search on earthquakes. You'll find your answer.

Answer 6

i think it's the shifting of the earth. well , I know it is. it must be the weight of us that creates the unbalance of the underground plates in the earth. maybe it just population and growth...building cities and such.

Answer 7

main cause of earthquakke is shifting or overlapping in the layers of earth's crust.The shifting is of 2 types.Sideways & one that takes place over one other.this shifting causes tremors.....and hence we are shakened

Answer 8

go type in 'earthquakes' in wikipedia

Answer 9

When two tectonic plates collide.