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SEISMIC WAVES, SIESMIC ZONES - Coggle Diagram
SEISMIC WAVES
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WHAT IS IT?
Seismic waves are the waves of energy caused by the sudden breaking of rock within the earth. They are also known as tsunamis and they are quite dangerous when they get to the coast. They are the energy that travels through the Earth and is recorded on seismographs. 
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TYPES:
There are two main different kinds of seismic waves, P and S waves. They travel through the interior of the earth and they move in different ways.
P-waves are pressure waves that travel faster than other waves through the earth. These waves can travel through any type of material, including fluids, and can travel nearly 1.7 times faster than the S-waves.
S waves, on the other hand, are longitudinal, slower than P-waves. Speeds are typically around 60% of that of P-waves in any given material.They are also capable of traversing only solid materials as fluids (liquids and gases) do not support shear stresses.
CONSECUENCES
The main consequence of this phenomen is the impact. The effects of a seism bring the consequence of the sway of the ground, fires, seismic marine waves, collapse, as well as the interruption of vital services, panic and psychological shock.
CAUSE
- Seismic waves are caused by the sudden
movement of materials within the Earth, such
as slip along a fault during an earthquake.
- Seismic waves can also be created artificially
by the use of explosives or trucks.
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HOW ARE THEY MEASURED?
Seismic waves are measured with a seismograph which is the primary earthquake measuring instrument.The seismograph produces a digital graphic recording of the ground motion caused by the seismic waves. The digital recording is called a seismogram. A network of worldwide seismographs detects and measures the strength and duration of the earthquake's waves
SIESMIC ZONES
COUNTRIES WITH MOST EARTHQUAKES
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Afghanistan, India, Greece, and Mexico- 32 earthquakes since 1900
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TYPES
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WHAT IS IT?
Seismic zones are those active areas of the earth’s crust that are very prone to undergone large seismic movements; they coincide with the impact or friction areas of the planet.
LOCATION
There are three seismic belts in the world, the main seismic zones of the planet are:
The Pacific Ring of Fire: it is located on several tectonic plates so it is in continuous tension, giving rise to intense seismic and volcanic activity.
The most affected locations are Russia, Taiwan, Japan, Indonesia, New Zealand, some South American countries (Peru, Argentina), Central America, North America, Mexico, Bolivia, Argentina,
The belt located in the center of the Atlantic Ocean.
The Trans-Asian belt: it occupies the Himalayas, Iran, Turkey, the Mediterranean Sea and the South of Spain.
SEISMIC MAGNITUDE SCALE
Magnitude, Richter scale: Effects of the earthquake
- Less than 3.5: Usually not felt, but registered
- 3.5-5.4: Often felt, but only causes minor damage
- 5.5-6.0: Causes light damage to buildings
- 6.1-6.9: Can cause severe damage in areas where many people live
- 7.0-7.9: Mayor of Terremoto. Causes serious damage
- 8th mayor: Great earthquake. Total destruction to nearby communities
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