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Long-Term Prediction Long-term earthquake prediction recognizes that earthquakes have recurred many times along existing faults and will probably occur in these same regions again.
Short-Term Prediction Short-term predictions are forecasts that an earthquake may occur at a specific place and time. Short-term prediction depends on signals that immediately precede an earthquake. Foreshocks are small earthquakes that precede a large quake by a few seconds to a few weeks. The cause of foreshocks can be explained by a simple analogy

Seismic waves
Seismic waves are earthquake generated and recorded on a seismograph. When an earthquake occurs, energy is released in all directions from the interior to the surface. There are two kinds of seismic waves: body waves and surface waves. Body waves are further classified as primary or P-waves, which are longitudinal waves that move fast. S-waves, or secondary waves, are transverse waves that move slowly.

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Seismic waves are earthquake generated and recorded on a seismograph. When an earthquake occurs, energy is released in all directions from the interior to the surface. There are two kinds of seismic waves: body waves and surface waves. Body waves are further classified as primary or P-waves, which are longitudinal waves that move fast. S-waves, or secondary waves, are transverse waves that move slowly.

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Long-term earthquake prediction recognizes that earthquakes
have recurred many times along existing faults and
will probably occur in these same regions again. there are two types of predictions:

-However, long-term prediction gives only a vague idea of when
the next earthquake will strike but such an analysis
could be in error by hundreds of years.
-Short-term predictions are forecasts that an earthquake may occur at a specific place and time. Short-term prediction depends on signals that immediately precede an earthquake. Foreshocks are small earthquakes that precede a large quake by a few seconds to a few weeks.
there are two types of seismic waves. surface waves, which travel throught the earth surface, are divided in roll waves, which moving up and down the earth, and love waves, which moving left and right the earth. body waves travel on earth surface and there are two types of body waves:
S waves and P waves.
S waves are longitudinal. they can travel in air, solid and liquid. P waves are transversal and they can only travel to solid.

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Earthquakes are natural vibrations of the ground, rapid and violent, caused by the sudden release of mechanical energy within the lithosphere.

There are two types of seismic waves: surface waves and body waves. Surface waves, which travel through the earth surface, are divided in roll waves, which moving up and down the earth, and love waves, which moving left and right the earth.

Body waves travel on earth surface and there are two types of body waves: S-waves and P-waves.

S-waves are longitudinal. they can travel in air, solid and liquid. P-waves are transversal and they can only travel to solid.

The epicenter is, instead, the point of the earth surface, located vertically above the hypocenter, which is reached first by the vibrations.

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The seismic waves are divide into types:
-Body Waves;
-Surface Waves;
Body waves are divided into:
-Primary waves (P waves which are longitudinal waves that move fast)
-Secondary waves (S waves which are transverse waves that move slowly)

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Earthquake prediction is divided in long-term and short term prediction. Long term prediction gives only a vogue idea of when the next earthquake will strike. Short term prediction are forecast that on earthquake may occur at a specific place and time.
There are two types of seismic waves: surface waves and body waves. Surface waves, which travel through the earth surface, are divided in roll waves, which moving up and down the earth, and love waves, which moving left and right the earth.
Body waves travel on earth surface and there are two types of body waves: S-waves and P-waves.
S-waves are longitudinal. they can travel in air, solid and liquid. P-waves are transversal and they can only travel to solid.

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The natural phenomenon who generates seismic waves is the earthquake, whose prediction could be a long-term prediction (which gives an ideo about when the next eartquake will happen) and a short-term prediction (which are forecasts that on earthquake may occur ata a specific place and time). It can generate different kinds of seismic waves:
1: Body waves, which travel through the earth surface; they're divided in two different kinds:
a: Primary waves (P-waves, which are longitudinal waves);
b: S-waves, trasverser waves that move slowlier than P-waves.
2: surface waves, which travel on the top of the earth surface; they're divived in two kinds too:
a: Rolly waves, which move up and down;
b: Love waves (the most dangerous), which shift left and right and they're perpendicular to the direction of the motion

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Long-term earthquake prediction recognizes that earth-
quakes have recurred many times along existing faults and
will probably occur in these same regions again. However, long-term prediction gives only a vague idea of when
the next earthquake will strike. Short-term predictions are forecasts that an earthquake may
occur at a specific place and time. Short-term prediction de-
pends on signals that immediately precede an earthquake.
Foreshocks are small earthquakes that precede a large
quake by a few seconds to a few weeks. The cause of fore-
shocks can be explained by a simple analogy. However, foreshocks
preceded only about half of a group of recent major earth-
quakes selected for study. In addition, some swarms of small
shocks thought to be foreshocks were not followed by a
large quake. Another approach to short-term earthquake prediction is
to measure changes in the land surface near an active fault
zone.

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Giovanni Lena
The seismic Waves are divided in two types,body waves that travel throught the earth's surface like a hammer that hit the side.
Surface waves,that travel on earth's surface.
The body waves are divided in p-waves and s-waves.
The surface waves are divided in rolly waves and love waves.

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The seismic waves are divided into two kinds: body waves, which are longitudinal waves that move fast and surface waves, which are transverse waves that move slowly.

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THERE ARE TWO KINDS OF SEISMIC WAVES :
1. BODY WAVES , WHICH TRAVEL THROUGHT THE EARTH'S SURFACE ;
2. AND SURFACE WAVES , WHICH TRAVEL ON EARTH'S SURFACE.

THE BODY WAVES ARE DIVIDED IN TWO DIFFERENT WAVES :
P-WAVES, WHICH ARE LONGITUDINAL WAVES THAT MOVE FAST AND S-WAVES WHICH ARE TRANSVERSER WAVES THAT MOVE SLOWLY .

THE SURFACE WAVES ARE DIVIDED IN TWO DIFFERENT WAVES :
ROLLY WAVES WHICH MOVING UP AND DOWN
AND LOVE WAVES WHICH SHIFTING LEFT AND RIGHT. THESE WAVES ARE PERPENDICULAR TO THE DIRECTION OF MOTION .

REGUARDING THE EARTHQUAKE PREDICTION THERE ARE THE  LONG-TERM PREDICTION WHICH GIVES ONLY A IDEA OF WHEN THE NEXT EARTHQUAKE WILL STRIKE.

AND THERE ARE THE SHORT TERM PREDICTION WHICH ARE FORECASTS THAT ON EARTHQUAKE MAY OCCUR AT A SPECIFIC PLACE AND TIME.

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Seismic waves

Surface(transversal)                                                            Body
Rayleigh(up and down)/Love(left and right)           p(longitudinal) /s(transversal)
330 m/s air             only solid
1500 m/s liquid         3000 m/s
5000 m/s solid

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Long-term Predictions tell us where earthquakes can happen and short-term predictions are forecasts that an earthquake may happen at a specific place and at a specific time by small earthquakes called foreshocks which precede a large one. The cause of them is explained by 2 principles .

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... Cosmology & Astronomy on Khan Academy

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Seismic waves | Earth geological and climatic history | Cosmology & Astronomy | Khan Academy

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EARTHQUAKE PREDICTION
Long-Term Prediction: Long-term earthquake prediction recognizes that earthquakes have recurred many times along existing faults and will probably occur in these same regions again.
Short-Term Prediction: Short-term predictions are forecasts that an earthquake may occur at a specific place and time. Short-term prediction depends on signals that immediately precede an earthquake. Foreshocks are small earthquakes that precede a large quake by a few seconds to a few weeks.

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Long-term earthquake have recurred  many times along existing faults and will probably occur in these same regions again.
Short-term predictions are forecasts that an earthquake may occur at a specific place and time. Short-term prediction depends on signals that immediately precede an earthquake. Foreshocks are small earthquakes that precede a large quake by a few seconds to a few weeks. The cause of foreshocks can be explained by a simple analogy

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Long-term Predictions tell us where earthquakes can happen, but short-term predictions are forecasts that an earthquake may happen at a specific place and at a specific time by small earthquakes called foreshocks.

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earthquakes have recurred many times along existing faults

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THE SEISMIC WAVES

Long-term earthquake prediction recognizes that earthquakes

have recurred many times along existing faults and

will probably occur in these same regions again.  . this seismic waves in some places , for example have occurred separated by 400, 300, and 200 years.

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earthquakes have recurred many times along existing faults and will probably occur in these same regions again.

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There are two types of earthquake prediction: the long-term and the short-term

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The seismic waves are divided in two types:
-Body waves;
-Surface waves