A strong earthquake struck near Acapulco, Mexico this morning and could be felt as far away as Mexico City at about 10 a.m. today.  

The U.S Geological Survey originally measured the quake at a magnitude 6.8, but have since revised that to a 6.4. Initial reports say the quake lasted as long as 40 seconds. 

Workers in Mexico City reportedly exited offices and buildings and were standing in the streets.  

So far, there have been no reports of damage or injury. 

Check back for updates on this story.