Guam - Did you feel the ground shake this afternoon? Well, Guam residents most certainly did, as they experienced a sudden earthquake at 3:39pm this afternoon. According to the U.S. Geological Survey, the quake initially measured 5.9 on the Richter Scale, and was later downgraded to 5.5. 

The seismic event occurred 75 miles northeast from Hagatna, and 73 miles south of Saipan.