The estimated the blast was around 10 megatons of TNT equivalent, about 500 times as powerful as the bomb dropped on Hiroshima, Japan, during World Word II. the wave looked like a ripple produced by dropping a stone in a pond.
Scientists warn that Hawaii's Kilauea volcano is on the verge of a new explosion that could send ash, steam and sulfur dioxide spewing from the summit crater and toss six-foot wide boulders as far as a half-mile away in all directions.
Fifty years on geophysicists have progressed from believing continents never moved to thinking that every movement may leave a lasting memory on our Earth. By discovering the secrets of our past, we may be able to predict the motion of our plate tectonic future.
In the proposed new picture, the engine behind Earth's interior processes is not heat from the core but cooling at the planet's surface. This cooling and plate tectonics drives mantle convection, the cooling of the core, and Earth's magnetic field. Volcanoes and cracks in the plate are simply side effects.
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