EARTH
FIRE
AIR
WATER
Width of band corresponds to severity of event
Events proceed chronologically from the center
The Japan earthquake was one of the five most powerful ever recorded
EARTHQUAKES MEASURED ON THE RICHTER SCALE
OKLAHOMA NOV. 6 MAGNITUDE 5.6 Largest in state's history
TURKEY OCT. 23 MAGNITUDE 7.1 At least 534 killed
INDONESIA SEPT. 5 MAGNITUDE 6.6 At least 10 killed
VIRGINIA AUG. 23 MAGNITUDE 5.8 No casualties, but it ignited a social-media frenzy
KYRGYZSTAN JULY 19 MAGNITUDE 6.1 At least 13 killed
SPAIN MAY 11 MAGNITUDE 5.1 At least 10 killed
BURMA MARCH 24 MAGNITUDE 6.9 At least...