megaton

Thousands of chunks of material from the comet would have rained down on Earth, each one releasing the energy of a one megaton nuclear bomb.

And then, within minutes, the isolated, verdant mountains above China's most famous panda reserve exploded as if hit by a megaton bomb.

For a one-megaton explosion at 200 kilometers in altitude, the diameter is about 600 kilometers, Papadopoulos states.

A megaton is a term used to describe one million tons of TNT .

This 10-megaton blast was five times more powerful than combined, including the nuclear-fission bombs dropped on Hiroshima and Nagasaki.

Within a millisecond after detonation, the diameter of the fireball from a 1 megaton (Mt) air burst is 150 m.

We're talking military grade, for multi-megaton ballistic weaponry.

Since that time, much more powerful weapons, with energy yields in the megaton range, have been developed.

The research climaxed in October 2006 when North Korea first tested a half-megaton nuclear device.

A typical hurricane produces the energy equivalent of 8, 000 one megaton bombs.

The resulting explosion, scientists estimate, would have been in the 3000-to-12000-megaton range.

The Dong Feng-5 (DF-5) liquid-fueled missile, first deployed in 1981, has a range of 13, 000 km and carries a single multi-megaton warhead.

At 1 mile from a 1-megaton explosion, for example, the duration of the positive phase of the blast wave is about 2 seconds.

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