What if a massive hole appeared in the Mariana Trench?

Oh, so magic. Okay, then I guess water would be arriving at Pluto. Are you thinking it would drain the oceans, or something? Compared to the size of the oceans, 50 feet is a pinprick, so it would take quite a while. read more

Compared to the size of the oceans, 50 feet is a pinprick, so it would take quite a while. read more

The pressure experienced at the bottom of the Mariana Trench while great 1,086 bars (15,750 psi) or 1071.72 atmospheres [standard] would probably not be enough to cause a cube of pure U235 or pure U233 to become supercritical. Your intuition regarding high pressures reducing the critical mass of pure fissile like U235 is a good one. read more

The hole fills in, with huge columns of steam and great convulsions. The Mariana Trench is gone, and with it Guam and the Mariana Islands. The area is now marked by a 100-kilometer-wide scar of magma sizzling beneath the waters of the Pacific. read more