an 8.2 magnitude quake

an 8.2 magnitude quake 진도 8.2의 지진 eight point two.. mag/nitude

When you describe an earthquake you can use the word 'magnitude' along with a number to describe how powerful it was. Sometime we can just cut it and say a 8.2 mag.

Quake means earthquake.
Before the earthquake sometimes they have little earthquake, we call those 'Pre-quake' 'Pre-earthqauke'

After the earthquake they also have other earthquake, we call those 'Aftershocks' 

A: Did you hear? An earthquake just hit Chile.

B: Oh no. What magnitude?
A: 8.2

A: Wow~ That's a big one. I hope people are okay...

A: 들었어? 지진이 칠레를 강타했데.
B: 오 이런. 진도가 얼마나 되?
A:  8.2
B:  이런~ 어마어마하다. 사람들 모두가 괜찮길..