Yellowstone has been widely reported as the biggest potential super-volcano for many years but there are bigger ones that have been confirmed in recent times. I can't find a current list although any out of the historic super-volcanic explosions are obvious candidates as super volcanoes are unlikely to die because of the size of the faults.

A brilliant read although it was first published in 2003 explains a heck of a lot about our Earth,the Universe and beyond.
A Short History of Nearly Everything by Bill Bryson

Never read any of Bill Brysons books. I didn't know he ventured into that department. Thank you, Salmon.

This is sad. I hope they find the answer. If we don't hear anything we can guess that silence is protecting someone.

https://www.oceanographicmagazine.com/news/dead-crustaceans-north-england/

As thousands of dead crustaceans continue to wash up around the Teesside area in the north east of England, scientists are trying to establish the underlying cause of the mass die-off.