A normal fault drops rock on one side of the fault down relative to the other side. A normal fault is caused by tension.
A thrust fault raises rock on one side of the fault up relative to the other side. A thrust fault is caused by compression.
In a slip-strike fault, rocky blocks on either side of fault scrape along side-by-side. A slip-strike fault is caused by shearing.
Left-lateral faults in siltstone. Near Lillooet, British Columbia (Canada).
What Causes an Earthquake?
When plates collide or rub past each other, they can cause the Earth to shake. This is because friction stops them from moving easily
1. Two plates moving past each other get jammed together. 2. Increasing pressure causes the plates to move in a sudden jerk – an earthquake. 3. The sudden movement sends a shockwave through the earths crust.
The point of the earths surface directly above the focus is called the epicentre. The point where the seismic waves start is called the focus Seismic Waves
Earthquake energy is released in seismic waves. These waves spread out from the focus. The waves are felt most strongly at the epicentre, becoming less strong as they travel further away. The most severe damage caused by an earthquake will happen close to the epicentre.
When two continental plates converge, we get mountain ranges Mt Everest is one example of this kind of mountain forming. In fact, Mt Everest gets taller by 4mm every year, because the plates continue to converge.
The Himalayas (of which Mt. Everest is a part) are an example of two continental plates converging
The Aleutian Islands are an example of two oceanic plates converging. The Pacific plate is being subducted under the North American plate, giving us a trench.
The Science of Earthquakes. Originally written by Lisa Wald for “The Green Frog News” ... What causes earthquakes and where do they happen?
Read more
Reply to ASK-AN-EARTH-SCIENTIST Subject: What causes earthquakes? What causes earthquakes? The short answer is that earthquakes are caused by faulting, a ...
Read more
What Causes an Earthquake? Faults Explained. Different kinds of faults make different kinds of earthquakes. View Images.
Read more
In this video lesson you will learn what causes earthquakes and where they occur. You will also understand the theory of elastic rebound, and how...
Read more
Why Do Earthquakes Happen? Earthquakes are usually caused when rock underground suddenly breaks along a fault. This sudden release of energy causes the ...
Read more
What causes Earthquakes. The Earth's outer layer or crust is broken into pieces called tectonic plates which are constantly moving towards, ...
Read more
What causes earthquakes and volcanic eruptions and creates mountains and ocean basins? earths plates 4 people found this useful Edit. Share to: Answered ...
Read more
What causes earthquakes? The shaking motion of an earthquake is the result of a sudden release of energy. Earthquakes are caused when stress, building up ...
Read more
What causes earthquakes Earthquakes waves radiate outward in all directions from the earthquake focus. The focus is where the rocks first break apart ...
Read more
Earthquakes (Earthquakes are not associated with weather, ... Click Here to learn more about earthquakes from USGS. What causes an earthquake?
Read more
Add a comment