English Deutsch Français Italiano Español Português 繁體中文 Bahasa Indonesia Tiếng Việt ภาษาไทย
All categories

5 answers

http://library.thinkquest.org/03oct/01424/how_are_tsunamis_formed.htm

http://www.ussartf.org/tsunamis.htm


http://www.windows.ucar.edu/tour/link=/earth/tsunami2.html

http://tsunami-search-swicki.eurekster.com/How+Are+Tsunamis+Formed/

When you get done reading those I can get you more....




g-day!

2007-10-28 02:51:40 · answer #1 · answered by Kekionga 7 · 0 0

I presume that you are talking about the enormous sea waves that are capable to cause large scale destruction and are known as Tsunamis related to the Japanese scientist who identified that phenomena.

Tsunamis, also called seismic sea waves or, incorrectly, tidal waves, generally are caused by:
-Violent underwater earthquakes.
-Less commonly by submarine landslides.
-Infrequently by submarine volcanic eruptions (example below)
-Very rarely by a large meteorite impact in the ocean.

Submarine volcanic eruptions have the potential to produce truly awesome tsunami waves. The Great Krakatau Volcanic Eruption of 1883 generated giant waves reaching heights of 125 feet above sea-level, killing thousands of people and wiping out numerous coastal villages.

The Pacific Ocean is surrounded by a series of mountain chains, deep ocean trenches and island arcs, sometimes called a "ring of fire." The great size of the Pacific Ocean and the large earthquakes associated with the "ring of fire" combine to produce deadly tsunamis.

In less than a day, these tsunamis can travel from one side of the Pacific to the other. However, people living near areas where large earthquakes occur may find that the tsunami waves will reach their shores within minutes of the earthquake. For these reasons, the tsunami threat to many areas (Alaska, the Philippines, Japan or the U.S. West Coast) can be immediate (for tsunamis from nearby earthquakes taking only a few minutes to reach coastal areas) or less urgent (for tsunamis from distant earthquakes taking from 3 to 22 hours to reach coastal areas).

The deep ocean trenches off the coasts of Alaska, the Kuril Islands, Russia,, and South America are well known for their violent underwater earthquakes and as the source area for destructive Pacific-wide tsunamis.

The following website includes good illustartions and drawings explains how those enormous waves formed:

http://geology.com/articles/tsunami-geology.shtml

2007-10-28 10:00:24 · answer #2 · answered by Anonymous · 0 0

What area are you referring to?

Large waves, called tsunamis, can be formed when an earthquake causes a landslide under water in the middle of the ocean.

2007-10-28 09:44:16 · answer #3 · answered by hottotrot1_usa 7 · 0 0

Maybe the question refers to areas where there is positive wave interference leading to the development of unusaully large ocean waves? Absent seismically induced waves, unusually large sea waves can develop in certain areas due to the specifics of the geometry of the coast and sea bottom, as well as in response to or coincident with weather events.

2007-10-28 10:28:43 · answer #4 · answered by busterwasmycat 7 · 1 1

Just in case you aren't talking about tsunamis, which really only look big when they get to shore, and even then resemble really big tides rather than crashing surf, try googling "rogue wave" or "freak wave"

http://en.wikipedia.org/wiki/Rogue_wave_(oceanography)

2007-10-29 03:23:08 · answer #5 · answered by gcnp58 7 · 0 0

fedest.com, questions and answers