0 a large ball of fire, especially one caused by a very powerful explosion: --
1 a great mass of fire high in the air, esp. one caused by a powerful explosion --
The explosions have caused several fireballs to unite into a gigantic pillar of fire 150 kilometers in height and 10 kilometers in width.
Rings around the fireball may become stable and form rings around the rising stem of the mushroom cloud.
Police believe he had been towing the boat on a trailer; when he climbed on the deck, his cigarette ignited the gas, causing a fireball.
As the shock wave expands, it cools down becoming more transparent allowing the much hotter and brighter fireball to become visible again.
An object trail can be seen to continue northward after the bright fireball event.
When liquid gas escapes at atmospheric pressure it vaporises and a spark can detonate it as a fireball which would envelop other ships in those highly congested waters.
Nature does provide fireballs, yes, meteorites, which bombard the earth at a rate of half a ton a day.
The base of the fireball was well above the surface of the sea.
