I think it's a very special case of a deep lake in volcanic caldera in a tropica...

salad-tycoon · on May 22, 2023

Wiki states many theories, no conclusive way to know and then makes a series of assumptions about velocity, force, vector etc.

I posit it could have been a sandworm deposit site that then suffered a spice reaction and exploded, like Dune.

Still, lake exploded a gas and people within 16 miles were knocked out or killed. Nuts.