What causes Earthquakes?What is causing a ring of fire? What is pangaea?

9 answers

The word Pangaea means entire Earth. Pangaea is the name for the supercontinent that existed about 250 million years ago. The continents broke apart and drifted into the current positions we know today.
Earthquakes may be caused by moving plate boundaries. It is when there are convergent, divergent or transform plate boundaries. In a convergent plate boundary, two plates will approach each other. The denser plate will then subduct. Friction is produced and the ground shakes, depending on the strength of the quake, causing an earthquake. Shockwaves are radiated around the area, creating tremors.
In a divergent plate boundary, two plates will move away from each other, causing the ground to sink, forming rift valleys. This will also cause earthquakes due to the sinking of land.

In transform plate boundaries, where earthquakes usually happen, two plates move side by side in opposite directions. This will produce lots of friction when the two plates come into contact. The ground will vibrate and the tremors can be felt, however, not as strong as those in convergent, as they definitely will not exceed 8.5 on the Richter Scale.

If earthquakes occur in water bodies, a tsunami, which is a huge tidal wave, will occur. It will originate at the epicenter, which causes a rise of fall in the seafloor. A wave is then produced. However, it cannot be clearly seen, until it gets nearer to coast. The water travelling at fast speeds will start to form great waves when the seafloor gets shallower. It may be up to 7-10 stories high! It will then cause the coastal areas to be flooded.

It is an area of Pacific Plate subduction, rimming (of course) the Pacific Ocean, the plate subduction creating a line of volcanism geographically around its perimeter that appears to form a circle or ring.
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