Tsunamis are characterized as shallow-water waves . ... It is because of their long wavelengths that tsunamis behave as shallow-water waves. A wave is characterized as a shallow-water wave when the ratio between the water depth and its wavelength gets very small.
Which of the following best characterizes a tsunami?
Which one of the following best characterizes tsunami? They have relatively small amplitudes compared to their very long wavelengths . Why did the 1988 Armenian earthquake (in the Armenian Republic, then part of the former Soviet Union) result in an estimated 25,000 deaths?
What are characteristics of a tsunami?
Characteristics of a tsunami wave
The wavelength of the tsunami wave is very long, often hundreds of kilometres long (a regular wave has a wavelength of about 30-40 metres). Earthquake tremors travel at 970 km /min while tsunami waves travel 800- 900 km/hour in open waters.
How would you describe a tsunami wave?
Tsunamis are giant waves caused by earthquakes or volcanic eruptions under the sea . Out in the depths of the ocean, tsunami waves do not dramatically increase in height. ... Tsunami waves may travel as fast as jet planes over deep waters, only slowing down when reaching shallow waters.
What is a characteristic of a tsunami quizlet?
Tsunamis have a very long wavelength (sometimes over 100km) and a low wave height (under 1 metre) in the open ocean , and they travel quickly at speeds of over 700km per hour but, when reaching shallow water bordering land, increase rapidly in height.
What are the 4 stages of a tsunami?
Answer 1: A tsunami has four general stages: initiation, split, amplification, and run-up . During initiation, a large set of ocean waves are caused by any large and sudden disturbance of the sea surface, most commonly earthquakes but sometimes also underwater landslides.
What are the types of tsunami?
There are two types of tsunami generation: Local tsunami and Far Field or distant tsunami .
What are two main causes of tsunami?
Tsunami are waves caused by sudden movement of the ocean surface due to earthquakes, landslides on the sea floor , land slumping into the ocean, large volcanic eruptions or meteorite impact in the ocean.
What is the biggest tsunami on record?
Lituya Bay, Alaska , July 9, 1958
Its over 1,700-foot wave was the largest ever recorded for a tsunami. It inundated five square miles of land and cleared hundreds of thousands of trees.
What is the depth of a tsunami?
The physics of a tsunami
In the deep ocean, the typical water depth is around 4000 m , so a tsunami will therefore travel at around 200 m/s, or more than 700 km/h.
What are the 5 causes of tsunami?
- Earthquakes. It can be generated by movements along fault zones associated with plate boundaries. ...
- Landslides. A landslide that occurs along the coast can force large amounts of water into the sea, disturbing the water and generate a tsunami. ...
- Volcanic Eruption. ...
- Extraterrestrial Collision.
What is tsunami in simple words?
A tsunami 津波 (つなみ) is a natural disaster which is a series of fast-moving waves in the ocean caused by powerful earthquakes, volcanic eruptions, landslides, or simply an asteroid or a meteor crash inside the ocean. A tsunami has a very long wavelength. It can be hundreds of kilometers long.
What are the 4 main causes of tsunamis?
Tsunamis are caused by violent seafloor movement associated with earthquakes, landslides, lava entering the sea, seamount collapse, or meteorite impact . The most common cause is earthquakes. See the percentages on the right for the geological events that cause tsunamis.
What is the most important property determining how powerful a tsunami will be?
The area and height of the seafloor deformation are the most important factors in how big a tsunami will be.
What is similar to a tsunami?
Although both are sea waves, a tsunami and a tidal wave are two different and unrelated phenomena. A tidal wave is a shallow water wave caused by the gravitational interactions between the Sun, Moon, and Earth (“tidal wave” was used in earlier times to describe what we now call a tsunami.)
What can cause a tsunami quizlet?
A tsunami is a long high sea wave caused by an earthquake, submarine landslide, or other disturbances . As a tsunami nears the coastline, it may rise to several feet, and can cause great loss of life and property damage when it comes ashore.
