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by MrReGlog
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An earthquake is a sudden and violent shaking of the ground, sometimes causing great destruction. Earthquakes are the result of a sudden release of energy in the Earth's crust that creates seismic waves.

The Richter scale is a scale used to measure the power of earthquakes. Earthquakes measured at less than about 2.0 on the Richter scale are not very serious, and can barely even be measured, much less felt. An earthquake is usually considered much more serious, and is felt by most people, once it hits about 5.0. An earthquake measuring 6.0 on this scale has a magnitude ten times greater than a 5.0 quake. One whole number increase also indicates that about 31 times more energy was released during a quake.

An earthquake occurs because of geologic forces inside the Earth. These forces build up slowly and eventually become so strong that they cause rocks to break underground. When this happens, tremendous energy is released suddenly in the form of motion that spreads out in all directions from the break, causing the ground to shake and move. This sudden release of energy and movement is what makes an earthquake so destructive. the sudden release of energy can cause a huge amount of damage.

another thing that makes earthquakes so destructive is that they can create tsunamis. When the siesmic waves travel through a body of water, they create huge waves that destroy everything when they reach the land. In the deep ocean, tsunamis might have wavelengths as long as several hundred kilometers and reach speeds of up to 720 kilometers per hour. Yet the waves may be less than a meter tall, letting them pass unnoticed beneath ships at sea. When these waves enter the shallower water approaching shore, their speeds drop and their heights increase dramatically. They tend to get bigger if they roll over gentling sloping shores and underwater ridges, towering as high as 30 meters. When tsunamis slam into shore, they can flood up to two kilometers inland.

A fault that combines some strike slip motion with some dip-slip motion.

Oblique slip fault

Strike slip fault

Dip slip fault

A fault where to plates slide past eachother horizontaly

A fault where two plates move verticallyaway from eachother

The ring of fire is an arc of intense earthquake and volcanic activity stretching from new zealand, along the eastern edge of asia, north across the islands of alaska, and south along the coast of north and south america. it is composed if 75 percent of the earths active and dormant volcanoes. The ring of fire is located along the borders of the pacific plate and other tectonic plates.

by Brad Moelker



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