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Seismic zone

earth science Maturity 11-13 Next article →

Earthquakes can happen in many different places. Some areas shake more often than others. We call these special areas seismic zones. You might also hear them called earthquake belts. These zones often share a common cause for the shaking. Scientists use these zones to study how the ground moves. They help us understand where the Earth might shake next.

Quake epicenters 1963-98
Quake epicenters 1963-98

There are different ways these zones work. One type is called a Wadati–Benioff zone. This happens in a place called a subduction zone. In this area, one piece of the Earth sinks down. This sinking part is known as a down-going slab. As the slab moves, it creates a specific zone of shaking. This is one way the Earth stays active.

Quake epicenters 1963-98
Quake epicenters 1963-98

People have studied these belts for a long time. Maps help scientists show where these zones are. In the past, people used a different definition. They used zones to decide how to build things. This was called a seismic design level. That way of defining zones is now considered obsolete. Now, we focus on how much the ground moves.

Quake epicenters 1963-98
Quake epicenters 1963-98

One very famous area is the Circum-Pacific seismic belt. Many people call this the Ring of Fire. It looks like a ring around the Pacific Ocean. This is the greatest seismic belt in the world. About 81% of all major earthquakes happen here. The San Andreas Fault is inside this ring. It is on the West Coast of the United States.

Quake epicenters 1963-98
Quake epicenters 1963-98

There are many other seismic zones across the globe. The Charlevoix seismic zone is in Quebec, Canada. You can also find the New Madrid seismic zone. This one is in the Midwestern United States. Another area is the South West seismic zone. It is located in Western Australia. Each zone tells us a story about our planet.

Quake epicenters 1963-98
Quake epicenters 1963-98
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