Landslide- is rapid slipping of a mass of earth or rock from a higher elevation to a lower level under the influence of gravity and water lubrication. More specifically, rockslides are the rapid downhill movement of large masses of rock with little or no hydraulic flow, similar to an avalanche.
Tsunami - is a series of catastrophic ocean waves generated by submarine movements, which may be caused by earthquakes, volcanic eruptions, landslides beneath the ocean, or an asteroid striking the earth. Tsunamis are also called seismic sea waves or, popularly, tidal waves.
Tsunami, caused by undersea earthquake or an eruption of a underwater volcano, posses great destructive power for the coast. Tsunami spreading speed is from 50 to 1000 km/h, the height of waves in the ocean - from 0,1m to 5m. When tsunamis approach shallow water along a coast, they are slowed, causing their length to shorten and their height to rise sometimes as high as 100 ft (30 m). When they break, they often destroy piers, buildings, and beaches and take human life.
One of the best means of prediction is the detection of such earthquakes on the ocean floor with a seismograph network. Tsunamis may be detected by wave gauges, such as those emplaced as part of the Tsunami Warning System operating in the Pacific regions. Measurement of sudden sea level changes from satellites are also used to warn of a potential tsunami
Dirt volcanoes appear in low lands boggy areas which consist of mellow rocks like clay, loam or sand. During a strong earthquake they can became liquid and flow to the earth’s surface. In this way, dirt volcanoes in the shape of conical craters are formed. The process takes place not very deep, usually 20-30 meters up to permafrost.
This is how disk clouds are formed. During an earthquake, an enormous amount of energy is thrown out. This energy melts the underground ice. The waters evaporate and make dirt clouds.