How many earthquakes?

Number of Earthquakes . . . . . . . . .
9
 . . . . . . . . .
8
 . . . . . . . . .
7
 . . . . . . . . .
6 
 . . . . . . . . .
5
 . . . . . . . . .
4
 . . . . . . . . .
3
 . . . . . . . . .
2
 . . . . . . . . .
1
 . . . . . . . . .
0
1
2
3
4
5
6
7
8
9

                                                                   Magnitude
 

Most earthquakes usually occur at moderate magnitudes.