what is an earthquake
Answers
Answered by
2
An earthquake is the shaking and vibration of the Earth's crust due to movement of the Earth's plates (plate tectonics). Earthquakes can happen along any type of plate boundary. Earthquakes occur when tension is released from inside the crust
hope it help u
hope it help u
Attachments:
Answered by
0
The Earth’s crust is composed of sections that are called “plates” as in “tectonic plates”. Each of these plates are either under a continent (such as the Eurasia plate, or the North American plate) or under an ocean or part of one (the Pacific Plate or the Juan de Fuca plate). Now that we have established the entire crust of the Earth as a collection of plates, let’s put them in motion.
Convection currents in the mantle (just under the crust) puts pressure on the crustal plates to move them in the direction that the convection current flows. The plate will try to move there, but, since the entire crust consists of plates, there is no ready place to go without pushing on the plate next to you. If the convection current continues to push, the pressure will build on this plate “boundary” (where the plate we are talking about abuts another), eventually the plate will start riding up over the plate (that’s not moving) and dive under the plate (that’s not moving).
When this movement happens, and it will be sudden (either riding up over, or diving under) - it causes massive shock waves that ripple through the earth. These shock waves will cause relative movement in the crust surface that is closest to where the sudden breaking movement occurred. This surface movement (whether its felt strongly or not so strongly) is directly proportional to the size and intensity of the break itself, and how far you are from it.
You will feel the surface move, as the shock waves ripple through it. This is the earthquake that you feel. The cause is the breaking movement of one plate at the junction of another plate.
some earthquakes can be caused by the movement of magma in the crust (magmatic quakes, or harmonic tremors), or by movement on smaller break zones (called “faults” that exist between one or more bodies of rock or soil that move with respect to each other (any sudden movement along a fault will cause shock waves of varying intensity).
The effects of quakes are shaking ground; if the shaking is strong enough, it may cause landslides, make building foundations crumble, roads may collapse, power may be disrupted, and so forth.
HOPE IT HELPSS U
Convection currents in the mantle (just under the crust) puts pressure on the crustal plates to move them in the direction that the convection current flows. The plate will try to move there, but, since the entire crust consists of plates, there is no ready place to go without pushing on the plate next to you. If the convection current continues to push, the pressure will build on this plate “boundary” (where the plate we are talking about abuts another), eventually the plate will start riding up over the plate (that’s not moving) and dive under the plate (that’s not moving).
When this movement happens, and it will be sudden (either riding up over, or diving under) - it causes massive shock waves that ripple through the earth. These shock waves will cause relative movement in the crust surface that is closest to where the sudden breaking movement occurred. This surface movement (whether its felt strongly or not so strongly) is directly proportional to the size and intensity of the break itself, and how far you are from it.
You will feel the surface move, as the shock waves ripple through it. This is the earthquake that you feel. The cause is the breaking movement of one plate at the junction of another plate.
some earthquakes can be caused by the movement of magma in the crust (magmatic quakes, or harmonic tremors), or by movement on smaller break zones (called “faults” that exist between one or more bodies of rock or soil that move with respect to each other (any sudden movement along a fault will cause shock waves of varying intensity).
The effects of quakes are shaking ground; if the shaking is strong enough, it may cause landslides, make building foundations crumble, roads may collapse, power may be disrupted, and so forth.
HOPE IT HELPSS U
Similar questions