What is the strongest earthquake ever recorded?

Related questions

1. Which state has the highest risk of earthquakes?
2. Are all earthquakes naturally occurring?
3. How do earthquakes cause damage?
4. How do earthquakes affect Earth?
5. Was there an earthquake in New York just now?
6. What's the strongest earthquake recorded?
7. What country has the least earthquakes?
8. What are examples of earthquake hazards?
9. Is it better to be inside or outside during an earthquake?
10. Which countries have the most earthquakes?

Tags

1. #chilean
2. #chile
3. #states
4. #southern
5. #referred
6. #earthquake
7. #occurred
8. #assigned
9. #great
10. #world
11. #instrumentally
12. #largest
13. #survey
14. #valdivia
15. #united
16. #magnitude
17. #geological
18. #documented