An earthquake is the shaking of the earth that occurs after pieces of the crust of the Earth suddenly shift. The term earthquake describes the sudden slip on a fault and includes the ground shaking and radiating seismic energy that is caused by the slip. Volcanic activity, or other geologic processes, may cause stress changes in the earth that can also result in an earthquake. Earthquakes can occur anywhere in the world although some areas of the globe are more likely to experience an earthquake than others. Earthquakes occur in all types of weather, in all climate zones, in all seasons of the year, and at any time of day making it impossible to predict with any certainty when an earthquake is likely to occur.
Earthquake prediction is still in the future.
A tsunami is a series of sea waves that can be caused by earthquakes or landslides at or beneath the sea floor. The displacement of the sea floor that occurs during certain large submarine earthquakes and landslides causes displacement of large volumes of the sea water above it producing large, fast moving waves. When a coast line experiences a tsunami it can be due to an earthquake near the coast or due to a quake occurring in a distant part of the ocean. Coastal areas may experience little or no damage from an earthquake but can be devastated by the resulting tsunami. The earth's crust is divided into eight major pieces called plates and many minor plates.