They use a seismograph to predict tsunamis.
hydrophone
they use probability
Predict this, scientist!
It is impossible to predict when a tsunami will happen until it is triggered.
It is impossible to predict when a tsunami will occur until it actually starts.
No one can predict this.
Nuclear energy
It is impossible to predict when a tsunami will occur until it actually starts.
It depends on what exactly you mean by predictable. If you mean is it possible to predict when a tsunami will happen, then the answer is negative. Tsunami are most commonly caused by seismic activity of tectonic plates, which creates a sudden, violent displacement of water. This means that to predict a tsunami, one must first be able to predict the earthquake, which, at the present time, is not possible. If you mean if it is possible to predict the behaviour of a tsunami, then the answer is yes. Tsunami follow set equations of wave behaviour, and therefore elements such as speed, height, wave period etc can be found and modelled.
You can't really predict a tsunami, but If you hear about any underwater earthquakes or volcanic eruptions, that can sometimes mean there will be a tsunami.
one way to predict when a volcano will occur is with the technology scientist use to determine when and where an eruption will occur.
The scientist will produce a pedigree from information about the members of past and present generations, and will use that information to predict the probability that an offspring will inherit a specific (usually undesirable) trait.