Earthquake 17 : Natural Disaster. A sudden slipping or movement of a portion of the earth's crust accompanied and followed by a series of vibrations. (PCiCCDE)
Arizona Department of Health Services, Emergency Preparedness Glossary, Phoenix, Arizona, USA 2011. http://www.azdhs.gov/als/childcare/documents/prepa redness/emergency-preparedness-glossary.pdf, (Emr Prep - Amer) {846}