one common meethod is to estimate the sizes of the waves especially to object of known sizes.
Yea they do =)
yes
Yes, you do however you can also measure it by deaths and casualties.
they are caused by earthquakes and the scientist measure the earthquake magnitude and the predict.
They use a seismograph to predict tsunamis.
The Richter scale is a measure of the intensity of earthquakes. It does not indicate how large a tsunami will be.
No. Tidal gauges only measure water levels.
Tsunamographs are anchored, ocean-bottom apparatuses developed by the National Oceanic and Atmospheric Administration and used as part of the Deep-ocean Assessment and Reporting of Tsunamis system to measure and categorize tsunamis. The ocean-bottom apparatus recognizes and reports changes in pressure that occur when water levels change, and then transmit a signal to bouys which measure wave height and transmit all of that information to satellites. This information is used to track and forecast the progress of tsunami waves, which can then help categorize the strength and speed of each tsunami.
Tsunamis that are triggered by volcanic eruptions
They cause tsunamis
Unfortunately there is nothing we can do to prevent tsunamis.
the tsunamis can carry jellyfish along