The amount of time that Earth shakes during an earthquake can last from a few seconds to three or four minutes.
Earthquakes strike suddenly,violently, and without warning at anytime of the year and at anytime of the day or night.
Sometimes smaller earthquakes occur before a big earthquakes 🙂
The most powerful earthquake ever recorded on Earth occurred in Chile( South America) in 1960. It Measured 9.5 on th Richter Scale.