One of the axioms of the game is that everything has a level. Including events. The level of the event determines the extent of the event, and mirrors the definitions of the nobility. Naturally events that affect a larger region have a greater severity.
|15||Minor Empire/Imperial City|
|13||High Kingdom/Royal City|
Most random events have a level of 2d6. However major random events will have a level of 3d6, and local random events will only have a level of 1d6. It is assumed that World level and Cosmic level events won't be generated randomly.
There are two types of events that can be randomly encountered in the game. The first are generated via the encounter tables and are treated like any other encounter (which means that yes, you can encounter a wandering earthquakes); the second affect a character's domain and are rolled on the seasonal event tables for each domain. The level of the event is then compared to the level of the character's domain to determine the direct severity of the event on the character's domain, and the surrounding domains.