Fireball, 7 April 2018
On 7 April 2018 at 03:05 UTC, sensors detected a fireball above 72.4°N, 78.7°W, 31.5 km up. It released energy equal to about 0.23 kilotons of TNT.
The numbers
- Date and time (UTC)
- 7 April 2018, 03:05
- Location
- 72.4°N, 78.7°W
- Height at peak brightness
- 31.5 km
- Speed
- Not released
- Light energy radiated
- 7.19 × 10¹⁰ joules
- Estimated total energy
- 0.23 kilotons of TNT
What does that mean?
That is a small burst by fireball standards: the Chelyabinsk fireball of 2013 released about 440 kilotons. If the object was stony rock entering at a typical 20 km/s, it was roughly 1.5 metres across and weighed around 4.8 tonnes.
Most objects of this kind break up and burn away high in the atmosphere, but larger ones can drop small meteorites. About 70% of Earth is ocean, so most fireballs like this fall into the sea.
Saw a bright fireball yourself? Report what you saw.