Tremors are a good sign. It means the plates are releasing energy. If they didn't, the energy would build up, and then shake in a fierce way.
It was over as fast as it came. This tremor was 3.5. A smaller tremor shook about half an hour later, but I didn't feel that one. In the local schools you have earthquake drills. If the schools are near water, you also have tsunami drills. I guess I have to prep my family in case we get the big one. But, with all the tremors and the shaking, it may not come.