Steven 7,
Thank you so much for the links. "Thousands of fissures ripped open fields, and geysers burst from the earth, spewing sand, water, mud and coal high into the air."<<<<this line from the article on the 1811 earthquake is certainly a description that I would lend to the planet Neptune.
I will utilize these articles to look compare to the possible upcoming effects on Missouri.
Thanks,
A.