An earthquake is a term used to describe ground shaking caused by the sudden release of accumulated strain by an abrupt shift of rock along a fracture in the earth or by volcanic or magmatic activity, or other sudden stress changes in the earth.
A comprehensive list of Disaster Preparedness related Internet links. These Internet links are resources to find information before and after any disaster incident. Each of these categories is then sub-divided into more detailed categories where you will find a comprehensive list of valuable links.
Federal - General
National Integrated Drought Information System (NIDIS) - Drought.Gov
USDA Drought Portal
U.S. Seasonal Drought Outlook
U.S. Drought Assessment
North America Drought Monitor
Drought Monitoring Indices