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Aribethfollowshare
7-23-2009 1:18 PM
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Aribeth says:
Kashmir earthquake, 2005
178 megatone TNT
Caused damage in Islamabad, 65 miles away.


Mount St. Helena eruption, 1980
500 megatons TNT
Devastaled several hundred square mil areas


San Francisco eartquake, 1906
1 gigaton TNT
Caused $5.6 billions in property damage


Krakatoa eruption, 1883
5.6 gigatons TNT
Worldwide effects included the destruction of 165 villages and towns


10 km asteroid impact, 65 millions years ago
100.000 gigatons. TNT
Caused final extinction of dinosaurs and many other species
An asteroid impact with the Earth may have caused the extinction of the dinosaurs. The Alvarez Asteroid Theory explains the huge K-T (Cretaceous-Tertiary) mass extinction 65 million years ago by a large asteroid hitting the Earth off the Mexican Yucatan peninsula. This impact would have caused severe climactic changes leading to the demise of many groups of organisms, including non-avian dinosaurs.
1 Comment   | Add a Comment
7-24-2009 10:17 AM
Satchamo
Mother Nature seems to do very well for herself! New Madrid earthquakes of 1811 to 1812--in the range of the 1906 San Francisco earthquake in the 1 gigaton range.
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