Earthquakes

What it is

An earthquake is shaking of the ground caused by movement below the Earth’s surface. Earthquakes can damage buildings, roads, bridges, utilities, and other infrastructure.

Why it matters in Tennessee

Tennessee has two seismic zones: the New Madrid Seismic Zone in West Tennessee and the East Tennessee Seismic Zone in East Tennessee. The New Madrid Seismic Zone includes northwestern Tennessee and has recorded thousands of small to moderate earthquakes since 1974. The 1811-1812 New Madrid earthquakes included three very large earthquakes estimated between magnitude 7 and 8. 

Because earthquakes can happen with little or no warning, preparedness focuses on knowing what to do when shaking starts. Even moderate shaking can damage buildings, disrupt utilities, affect transportation, and create safety hazards.

What to do before:

• Practice Drop, Cover, and Hold On.
• Secure heavy furniture, shelves, mirrors, and wall-mounted items.
• Know how to turn off utilities if instructed or if it is safe to do so.
• Keep emergency supplies at home, work, and in your vehicle.
• Make a communication plan with family, friends, or caregivers.

What to do during

• Drop to your hands and knees.
• Cover your head and neck under sturdy furniture if possible.
• Hold on until the shaking stops.
• If you are outside, move away from buildings, trees, streetlights, and utility lines.
• If you are driving, pull over safely and stay in the vehicle until shaking stops.

What to do after

• Expect aftershocks.
• Check yourself and others for injuries.
• Stay away from damaged buildings and downed power lines.
• Use text messages when possible to keep phone lines open.
• Listen for official information about sheltering, evacuations, road closures, and utility outages.

Stay informed

Earthquakes can happen without warning. Prepare ahead of time by practicing what to do and keeping emergency supplies where you can reach them.