NatGeo put together a concise video on earthquakes and how they occur:
Earthquakes can leave behind incredible devastation, while also creating some of the planet’s most magnificent formations. Learn about the geophysics behind earthquakes, how they are measured, and where the most powerful earthquake ever witnessed occurred.
And here are some interesting facts about earthquakes (via BBC):
- There are several million earthquakes annually
- An earthquake can affect a day’s length
- The city of San Francisco is moving towards the city of Los Angeles at a rate of ~2in/year