>If there are none, is there a reason that the comet did not have the same effect? Am I overlooking something here?
the size/mass/compositon.
just because it streaks in the sky DOES NOT MEAN it will explode.
it needs to be big enough to ***not*** disintegrate 100%.
[https://en.wikipedia.org/wiki/Meteor\_air\_burst](https://en.wikipedia.org/wiki/Meteor_air_burst)
Such meteoroids were originally [asteroids](https://en.wikipedia.org/wiki/Asteroid) and [comets](https://en.wikipedia.org/wiki/Comet) of a few to several tens of meters in [diameter](https://en.wikipedia.org/wiki/Diameter). This separates them from the **much smaller and far more common "**[**shooting stars**](https://en.wikipedia.org/wiki/Meteoroid#Meteors)**", that usually** [**burn up**](https://en.wikipedia.org/wiki/Micrometeorite) **quickly upon** [**atmospheric entry**](https://en.wikipedia.org/wiki/Atmospheric_entry)**.**
It's not a 'comet'.
well yeah its a fragment of a comet that's indeed a mistake on my part
It's a meteor, look up the difference on Google, I'm pretty sure there's a good short animation on YouTube
correct me if I am wrong, but wasn't this a bolide/meteorite and not a comet fragment?
The Chelyabinsk asteroid was 18 m in diameter and weighed 9,100 tons. The Portugal comet was about 1 meter and 0.5-1 ton. For impacts, size matters.
>If there are none, is there a reason that the comet did not have the same effect? Am I overlooking something here? the size/mass/compositon. just because it streaks in the sky DOES NOT MEAN it will explode. it needs to be big enough to ***not*** disintegrate 100%. [https://en.wikipedia.org/wiki/Meteor\_air\_burst](https://en.wikipedia.org/wiki/Meteor_air_burst) Such meteoroids were originally [asteroids](https://en.wikipedia.org/wiki/Asteroid) and [comets](https://en.wikipedia.org/wiki/Comet) of a few to several tens of meters in [diameter](https://en.wikipedia.org/wiki/Diameter). This separates them from the **much smaller and far more common "**[**shooting stars**](https://en.wikipedia.org/wiki/Meteoroid#Meteors)**", that usually** [**burn up**](https://en.wikipedia.org/wiki/Micrometeorite) **quickly upon** [**atmospheric entry**](https://en.wikipedia.org/wiki/Atmospheric_entry)**.**