Natural disaster is a major adverse event resulting from natural processes of the Earth;examples include volcano eruption, earthquake, tsunamis, cyclone and other geological processes.In turn, an earthquake under the water can also cause a tsunami, as the quake causes great waves by pushing large volumes of water to the surface. Tsunamis can also be caused by underwater volcanic eruptions. Volcanic eruptions are another natural disaster, and they are caused by magma escaping from inside the earth.
A volcano is a hole in Earth’s surface through which magma (called lava when it reaches Earth’s surface), hot gases, ash, and rock fragments escape from deep inside the planet. The word volcano also is used to describe the cone of erupted material (lava and ash) that builds up around the opening. The study of volcanoes is known as vocanology. According to frequency of erurption,volcanoes are of three types: active , dormant, and extinct volcanoes.
An active volcano is a volcano that has had at least one eruption during the past 10,000 years. An active volcano might be erupting or dormant. An erupting volcano is an active volcano that is having an eruption… A dormant volcano is an active volcano that is not erupting, but supposed to erupt again. The Ring of Fire is a string of volcanoes and sites of seismic activity, or earthquakes, around the edges of the Pacific Ocean. Roughly 90% of all earthquakes occur along the Ring of Fire, and the ring is dotted with 75% of all active volcanoes on Earth.
A dormant volcano is one that has not erupted recently but is expected to do so again. Prior to its 1980 eruption, Mount St. Helens had been classified as dormant. At present, there are about 600 volcanoes that have had known eruptions during recorded history, while about 50-70 volcanoes are active (erupting) each year. At any given time, there is an average of about 20 volcanoes that are erupting.
List of extinct volcanos includes volcanos which scientists consider unlikely to erupt again. A volcano which has not erupted in the past 10,000 years is extinct. The extinct volcano no longer has a lava supply. … Whether a volcano is truly extinct is often difficult to determine.Active volcanoes have erupted recently. A dormant volcano isn’t erupting right now. But volcanologist expect it would erupt at any time. Extinct volcanoes haven’t erupted for ten thousand years and aren’t expected to erupt again.
An earthquake (or quakes, tremors) is shaking of the surface of earth, caused by sudden movement in the Earth’s crust. They can be extremely violent or cannot be felt by anyone.
Earthquakes are usually quite brief, but may repeat. They are the result of a sudden release of energy in the Earth’s crust. This creates seismic waves, which are waves of energy that travel through the Earth. The study of earthquakes is called seismology.Seismology studies the frequency, type and size of earthquakes over a period of time.
There are large earthquakes and small earthquakes. Large earthquakes can take down buildings and cause death and injury. Earthquakes are measured using observations from seismometers. The magnitude of an earthquake, and the intensity of shaking, is usually reported on the Richter scale. On the scale, 3 or less is scarcely noticeable, and magnitude 7 (or more) causes damage over a wide area. The study of earthquakes is known as seismology. 3. TIDAL WAVES
A tidal wave is a regularly reoccurring shallow waterwave caused by effects of the gravitational interactions between the Sun, Moon, and Earth on the ocean. The term “tidal wave” is often used to refer to tsunamis; however, this reference is incorrect as tsunamis have nothing to do with tides.Tides are the rise and the fall of the sea levels caused by the combined effects of the gravitational forces exerted by the Moon and Sun and rotation of the Earth. … The Sun’s gravity fields pull the water up in our earth’s oceans, and that’s what makes waves.Algae are microscopic sea creatures. When billions of red algae form, or “bloom,” in the ocean, the waves and tides appear red. Finally, rip tides are not a tidal feature. Rip tides are strong ocean currents running