There is significant anecdotal evidence of unusual behaviour in animals before earthquakes occur however there is very little definitive scientific published work that can explain exactly what this behaviour is or what may cause it!
It has been suggested that animals may be more sensitive to precursor events such as micro seismicity or other phenomena that humans don't notice before an earthquake although this is currently very poorly understood and is an area of continuing research, particularly in China and Japan.
Scientists are able to predict large earthquakes to a certain extent. With the use of certain statistical methods, many earthquakes are able to be predicted.
witchcraft
It is important for scientists to develop ways to predict earthquakes. By it they can measure when the next one would be.
Scientists have no power to control earthquakes, nor to specifically predict them, but a logical area that the earthquakes would take place is along the plates of the earths crust. (Their shifting leads to earthquakes)
radon
Yes, through the use of global positioning systemsscientists use satellite data to predict earthquakes.
Nobody knows how many earthquakes can happen in a year because you cannot predict earthquakes. :)
You can't predict earthquakes
We can't predict earthquakes.
no but scientists are working on it
Yes. Earthquakes occur most often along fault lines. There are also many different devices (seismograph) that sense seismic waves and can predict earthquakes.
Earthquakes are difficult to predict because they are caused by the sudden release of energy in the Earth's crust, which is complex and constantly changing. Scientists have not yet found a reliable way to accurately forecast when and where earthquakes will occur.