Definitions for megatsunami
megat·suna·mi

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1. megatsunaminoun

   A megatsunami is a term used by the popular media to describe very large tsunamis, which are very large and destructive waves that are generally caused by a tremendous disturbance in the ocean floor. The term megatsunami is used informally for tsunamis with wave heights of 40 m or greater.

2. Etymology: From the Greek prefix mega- "large", plus Japanese 津波 / 津浪 (つなみ, tsunami), "harbour wave"

WikipediaRate this definition:0.0 / 0 votes

1. Megatsunami

   A megatsunami is a very large wave created by a large, sudden displacement of material into a body of water. Megatsunamis have quite different features from ordinary tsunamis. Ordinary tsunamis are caused by underwater tectonic activity (movement of the earth's plates) and therefore occur along plate boundaries and as a result of earthquakes and the subsequent rise or fall in the sea floor that displaces a volume of water. Ordinary tsunamis exhibit shallow waves in the deep waters of the open ocean that increase dramatically in height upon approaching land to a maximum run-up height of around 30 metres (100 ft) in the cases of the most powerful earthquakes. By contrast, megatsunamis occur when a large amount of material suddenly falls into water or anywhere near water (such as via a meteor impact or volcanic activity). They can have extremely large initial wave heights ranging from hundreds and possibly up to thousands of metres, far beyond the height of any ordinary tsunami. These giant wave heights occur because the water is "splashed" upwards and outwards by the impact or displacement. Examples of modern megatsunamis include the one associated with the 1883 eruption of Krakatoa (volcanic eruption), the 1958 Lituya Bay megatsunami (landslide into a bay), and the wave resulting from the Vajont Dam landslide (caused by human activity destabilizing sides of valley). Prehistoric examples include the Storegga Slide (landslide), and the Chicxulub, Chesapeake Bay, and Eltanin meteor impacts.

WikidataRate this definition:0.0 / 0 votes

1. Megatsunami

   Megatsunami is an informal term to describe a tsunami that has initial wave heights that are much larger than normal tsunamis. Unlike usual tsunamis – which originate from tectonic activity and the raising or lowering of the sea floor – known megatsunamis have originated from a large scale landslide, collision, or volcanic eruption event.

How to pronounce megatsunami?

1. Alex

   US English

   David

   US English

   Mark

   US English

   Daniel

   British

   Libby

   British

   Mia

   British

   Karen

   Australian

   Hayley

   Australian

   Natasha

   Australian

   Veena

   Indian

   Priya

   Indian

   Neerja

   Indian

   Zira

   US English

   Oliver

   British

   Wendy

   British

   Fred

   US English

   Tessa

   South African

How to say megatsunami in sign language?

Numerology

1. Chaldean Numerology

   The numerical value of megatsunami in Chaldean Numerology is: 1

2. Pythagorean Numerology

   The numerical value of megatsunami in Pythagorean Numerology is: 6

References

1. ^ Wiktionary
   https://en.wiktionary.org/wiki/Megatsunami
2. ^ Wikipedia
   https://en.wikipedia.org/wiki/Megatsunami
3. ^ Wikidata
   https://www.wikidata.org/w/index.php?search=megatsunami