[Berosus]

Too early. They are saying the eruption happened in 431 A.D. The Maya got over that, and enjoyed their peak years in the seventh century, before their decline set in.

[Red Badger]

Then maybe the Olmecs?......................

[SunkenCiv]

And they had other climax-and-collapse events, persisting into the Spanish conquest, and today their descendants help loot the ruins and keep in touch on smart phones. :^)

The earlier view was that the Mayan decline took place about 540 AD (something serious happened worldwide in 536 AD) and involved the El Chichon volcano. :^)

More on the current:

https://www.pnas.org/content/early/2020/09/22/2003008117

https://www.arch.ox.ac.uk/article/ice-core-dating-places-eruption-iiopango-431-ce-devastating-el-salvadors-maya-civilization

Regarding the 540/536 AD:

https://www.scientificamerican.com/article/volcanic-eruption-may-have-plunged-the-maya-into-a-ldquo-dark-age-rdquo/

http://www.freerepublic.com/tag/536ad/index