A supernova is one of the loudest and most energetic events in the universe. It can release more energy in a few seconds than the Sun will radiate in its entire lifetime. The sound of a supernova, however, cannot be heard on Earth because space is a vacuum and sound waves cannot travel through it.

In terms of electromagnetic radiation, a supernova can outshine an entire galaxy for a brief period of time. The peak luminosity of a supernova can reach absolute magnitudes of -19 or brighter, which means that it can be visible from billions of light-years away.

Here is a comparison of the loudness of a supernova to other astronomical events:

* A supernova can be 10 billion times louder than a volcano eruption.

* A supernova can be 100 billion times louder than a thunderstorm.

* A supernova can be 1 trillion times louder than a nuclear explosion.

However, it is important to note again that these comparisons are made in terms of electromagnetic radiation, not sound. The actual sound of a supernova cannot be heard on Earth because sound waves cannot travel through space.