5 ms·

https://en.m.wikipedia.org/wiki/Bradyseism https://en.m.wikipedia.org/wiki/Bradyseism Seems like a very slow process that happens on a wide scale and deep unde

• bradrn 2y ago
  The key bit in that article is this: > caused by the filling or emptying of an underground magma chamber In this case, the magma chamber underlies the entire area of the Phlegraean Fields. As more or less magma enters the chamber, the ground in the area slowly moves up or down.