Nearly half-a-million people in Illinois are participating in the Great Central U.S. Shakeout, a multi-state earthquake drill.  IEMA spokeswoman Patti Thompson says everyone should know to "Drop, Cover, and Hold On" in the event of a quake.  

Thompson comments

The drill is designed to help people understand the risks of an earthquake in Illinois and how to stay safe when one hits.  It’ll take place at 10:17 this morning.  

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