|
|
Bravehost.com - Web Site Under Construction
|
|
This is a test page, Site will hosted very soon, Please learn about tsunami in the mean time,
What was the highest tsunami? The highest, reliably measured tsunami on record occurred in Lituya Bay, Alaska. This unusual event was caused by a massive landslide that fell into the bay on July 9, 1958. The resulting wave surged up the slope on the opposite side of the narrow bay to a height of 518 m(1,700 ft). Some scientists believe that even higher tsunamis have occurred a long time ago when asteroids, or large meteors, fell into the ocean. Two areas where studies are underway to look for evidence of such tsunamis are Hawaii and the coast of the Gulf of Mexico. Usually, a tsunami is generated when an offshore earthquake moves the ocean bottom in the vertical direction. The waves then propagate towards the coast, growing larger as the water becomes more shallow. Measurements in the last 10 years have documented a 32 m maximum wave height in Okushiri, Japan, and 26 m height on Flores Island Indonesia. These were exceptionally high values due to topographic and bathymetric situations that were somewhat special. More typically, the heights of 10 destructive tsunamis in the Pacific since 1990 ranged from about 3 to 15 m; these claimed more than 4000 lives. If you want to explore the issue in more detail, I invite you to visit
NOAA's National Geophysical Data Center site. The site offers a historical
tsunami database that can be searched on-line. |
bravenet.com