What is a fault surface along which movement takes place?
Faults are cracks in the earth's crust along which there is movement. These can be massive (the boundaries between the tectonic plates themselves) or very small. If tension builds up along a fault and then is suddenly released, the result is an earthquake.
Which statement best describes the epicenter of an earthquake?
Which of the following responses best describes the epicenter of an earthquake? The point on Earth's surface directly above the focus of an earthquake. In calculating the location of the epicenter of an earthquake, which of the following factors is most useful?
What do we call seismic waves that are transmitted along the outside?
Surface waves – Travel along outer part of Earth.
Which of the following best describe liquefaction?
Which of the following best describes liquefaction? The transformation of stable soil into loose, liquefied material that is able to rise toward Earth's surface.
What term is used for the surface location of an earthquake?
The location below the earth's 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. Sometimes an earthquake has foreshocks.
What is fault movement?
A fault is a fracture or zone of fractures between two blocks of rock. Faults allow the blocks to move relative to each other. This movement may occur rapidly, in the form of an earthquake – or may occur slowly, in the form of creep. Faults may range in length from a few millimeters to thousands of kilometers.
What is an earthquake fault?
A fault is a fracture or zone of fractures between two blocks of rock. Faults allow the blocks to move relative to each other. This movement may occur rapidly, in the form of an earthquake – or may occur slowly, in the form of creep.
What is meant by epicenter Brainly?
The epicenter, is the point on the Earth's surface directly above a hypocenter or focus, the point where an earthquake or an underground explosion originates.
Which are surface waves?
A surface wave is a seismic seismic wave that is trapped near the surface of the earth.
What seismic waves stay on surface?
There are different types of seismic waves based on the movement . The two major types are body waves ( S and P waves ) and surface waves. Body waves can travel through earth inner layers while surface waves can travel only on the surface of the land.
What liquefaction means?
of making or becoming liquid Definition of liquefaction 1 : the process of making or becoming liquid. 2 : the state of being liquid. 3 : conversion of soil into a fluidlike mass during an earthquake or other seismic event.
What is the difference between liquification and liquefaction?
Liquefaction is the process of converting a substance from its solid or gas phase into its liquid phase. Liquefaction occurs naturally and artificially. Sometimes liquification is considered to be the same as liquefaction. However, some authors consider liquification to be a mis-spelling of liquefaction.
What is focus and epicenter?
The focus is the place inside Earth's crust where an earthquake originates. The point on the Earth's surface directly above the focus is the epicenter. When energy is released at the focus, seismic waves travel outward from that point in all directions.
What is a fault quizlet?
A fault is a break in a rock in which movement has taken place.
How faults are formed?
A fault is formed in the Earth's crust as a brittle response to stress. Generally, the movement of the tectonic plates provides the stress, and rocks at the surface break in response to this. Faults have no particular length scale.
What are the fault lines called?
Faults which move horizontally are known as strike-slip faults and are classified as either right-lateral or left-lateral. Faults which show both dip-slip and strike-slip motion are known as oblique-slip faults.
What is Epicentre short answer?
The epicenter is the point on the earth's surface vertically above the hypocenter (or focus), point in the crust where a seismic rupture begins.
What is a surface earthquake?
Surface faulting is displacement that reaches the earth's surface during slip along a fault. Commonly occurs with shallow earthquakes, those with an epicenter less than 20 km. Surface faulting also may accompany aseismic creep or natural or man-induced subsidence.
Which statement describes a surface wave?
A surface wave is a wave that moves along the interface of two different materials, like air and water.
What are two types of surface waves?
The two types of surface waves are named Love waves and Rayleigh waves, after the scientists who identified them. Love waves have a horizontal motion that moves the surface from side to side perpendicular to the direction the wave is traveling. Of the two surface waves, Love waves move faster.
What is liquefaction after an earthquake?
Liquefaction takes place when loosely packed, water-logged sediments at or near the ground surface lose their strength in response to strong ground shaking. Liquefaction occurring beneath buildings and other structures can cause major damage during earthquakes.
What is liquefaction and condensation?
Liquefaction refers to the change of phase from a gas to a liquid. 1. Condensation refers to the change of phase from a gas to either a liquid or a solid.
What is called a focus of an earthquake?
The hypocenter is the point within the earth where an earthquake rupture starts. The epicenter is the point directly above it at the surface of the Earth. Also commonly termed the focus. See also epicenter.
What is an earthquake Class 8?
Sudden shaking or trembling of earth is called Earthquake. It lasts for a very short time. It is caused by deep disturbance within the earth's crust.
What is a fault in geography quizlet?
A fault is a break in a rock in which movement has taken place. Normal Fault. When areas of the Earth are pulled apart (tension/tensile stress) a normal fault is formed.
What is a dip slip fault quizlet?
Dip-slip fault. A fault in which movement along the inclination of a fault plan occurs. There are two kids of dip-slip faults: Normal faults and Reverse and thrust faults. Normal faults. The hanging wall moves downward making fault block mountains.
Where faults are formed?
It forms when rock above an inclined fracture plane moves downward, sliding along the rock on the other side of the fracture. Normal faults are often found along divergent plate boundaries, such as under the ocean where new crust is forming. Long, deep valleys can also be the result of normal faulting.
Where do faults occur?
Faults are defined by the kind of motion that happens where they are. Normal faults show cracks where one block of rock is sliding down and away from another block of rock. These faults usually occur in areas where the crust is very slowly stretching or where two plates are pulling away from each other.
Why are they called fault lines?
The definition of a fault line is a break or fracture in the ground that occurs when the Earth's tectonic plates move or shift and are areas where earthquakes are likely to occur. A break where the Earth's tectonic plates shifted that is a likely site of an earthquake is an example of a fault line.
What fault line means?
noun. /ˈfɔːlt laɪn/ /ˈfɔːlt laɪn/ (geology) a place where there is a long break in the rock that forms the surface of the earth and where earthquakes are more likely to happen.