I experienced my first earthquake today . At first my chair was kind of wobbling and I thought one of the cats was trying to climb up the back of it . But I turned around and there was no cat and the shaking had stopped . So I turned back to my desk and the wobbling began again and I seriously wondered if I was having a seizure or something .

Options are:
1). They are used to it being their seizures ..
2). They just moved to an earthquake prone area ..
3). They have but they just do n't know it ..
4). They usually do n't feel them ..
Q: What may be the reason why they have n't experienced an earthquake ?
2).