Following the Great Earthquake of 2004, I can report we adopted the following safety reactions:
1. Look at each other, with a "what is that?" expression
2. Wonder why the house is shaking, and literally bending to a fro.
3. Puzzle why we can hear next door's ornaments hitting the floor and smashing, but ours haven't moved.
4. Ask each other "do we stay here or go outside?"
5. Forget 4, as it's finished.
6. Tell child aged three who has now joined us having been awoken by all this, that it was nothing.
7. Try to think of answer to aforementioned child's question "If it was nothing why is my bedroom light moving around".