Do earthquakes always have aftershocks?

Related questions

1. What should people do after an earthquake?
2. Are there more earthquakes now than in the past?
3. Are aftershocks ever stronger?
4. Is it normal to have earthquakes everyday?
5. How long does a 7.0 earthquake last?
6. Why are aftershocks more dangerous than the mainshock?
7. What is the safest place to be during an earthquake?
8. How strong is a 9.0 earthquake?
9. Why are aftershocks so dangerous?
10. Do aftershocks get stronger?

Tags

1. #happens
2. #aftershocks
3. #always
4. #earthquakes
5. #called
6. #scientists
7. #foreshock
8. #largest
9. #smaller
10. #mainshocks
11. #until
12. #earthquake
13. #these
14. #place
15. #occur
16. #mainshock
17. #larger
18. #follow
19. #afterwards