Earthquakes risk in North Carolina

Earthquake risk in North Carolina: what homeowners should know

North Carolina is not known for frequent large earthquakes, but the state has a real and documented risk. HomeRiskMap rates the state 2 out of 5 for earthquake hazard, meaning damaging earthquakes are less likely than in high-hazard states such as California or Alaska, but they are still possible. According to North Carolina Emergency Management and the USGS Earthquake Hazards Program, North Carolina experiences small earthquakes from time to time, and larger regional quakes can shake the state.

Earthquakes in North Carolina have no season. Unlike hurricanes, which have a defined Atlantic season, earthquakes can happen at any time of year. Most are shallow crustal events. In the eastern United States, shaking from a moderate earthquake can travel farther than in the western U.S. because older, harder bedrock transmits seismic waves more efficiently. That means a quake centered in or near North Carolina can be felt across many counties even if it is not strong enough to cause widespread damage.

Exposure varies. Western North Carolina, including the Blue Ridge and Appalachian counties, sits near the Eastern Tennessee Seismic Zone and has experienced notable quakes, including the 2020 Sparta earthquake in Alleghany County, which damaged homes, chimneys, and foundations. Central and northern North Carolina can feel earthquakes from the Central Virginia Seismic Zone, including the 2011 Mineral, Virginia earthquake. Southeastern North Carolina can be affected by the South Carolina Seismic Zone near Charleston. Coastal plain soils can amplify shaking in some locations, so distance from a fault is not the only factor.

North Carolina’s earthquake risk is best described as low-to-moderate, but not zero. The most exposed areas are the western mountains, the central Piedmont near regional seismic zones, and parts of the coastal plain that can feel distant quakes.

How earthquakes affect homes in North Carolina

Most North Carolina earthquakes are small and cause little to no damage. However, a moderate quake near a populated area can crack drywall, break windows, shift porches, and damage brick or stone veneer. The 2020 Sparta earthquake showed that even a moderate event can cause real problems for homeowners, including cracked foundations, damaged chimneys, and items falling inside homes.

Typical earthquake damage to homes includes:

• Foundation and crawl space damage: Cracks in concrete, separation between the house and its foundation, and shifting of piers or posts.
• Chimney and masonry damage: Cracked or toppled chimneys, broken bricks, and damaged unreinforced masonry walls.
• Interior damage: Cracked drywall, popped nails, sticking doors and windows, and broken tiles.
• Contents damage: Fallen bookshelves, broken televisions, spilled water heaters, and broken gas lines that can lead to fires.
• Porches and decks: Separation from the main house, cracked steps, and loose railings.

Older homes, homes with unreinforced brick or stone, and houses not bolted to their foundations are generally more vulnerable. Homes on crawl spaces or hillsides may also be at greater risk from shaking and ground movement.

Insurance considerations: Standard homeowners insurance policies in North Carolina typically do not cover earthquake damage. Coverage is usually available as a separate earthquake policy or as an endorsement added to an existing policy. If you own a home in western North Carolina or another area with higher exposure, ask your insurance agent specifically about earthquake coverage, deductibles, and whether masonry or foundation damage is included. After a presidentially declared disaster, FEMA assistance may be available, but it is not a substitute for insurance and usually does not cover all repair costs. The FEMA Earthquake Safety page explains more.

How to prepare your home for an earthquake

You do not need to live in California to take earthquake preparation seriously. Simple retrofits and smart storage can reduce damage and keep your family safer. Consider these steps:

1. Anchor your home to its foundation. If your house sits on a crawl space and is not bolted to the foundation, a licensed contractor can install foundation bolts and braces. This is one of the most effective ways to reduce shaking damage.
2. Brace and strap your water heater. Use approved straps to secure the water heater to wall studs. A moving water heater can break gas or water lines and cause a fire or flood.
3. Secure tall furniture and appliances. Anchor bookcases, china cabinets, refrigerators, and televisions to wall studs. Use safety straps for fragile items.
4. Install flexible gas connectors. Have a licensed plumber replace rigid gas connectors with flexible ones, and ask about an automatic seismic gas shut-off valve.
5. Check your chimney and masonry. Have a professional inspect brick chimneys and unreinforced masonry walls. Consider bracing or reinforcing weak chimneys.
6. Store heavy items low. Keep heavy boxes, tools, and glass containers on lower shelves. Avoid hanging heavy pictures or mirrors above beds and sofas.
7. Create an emergency plan and kit. Practice Drop, Cover, and Hold On with your household. Keep water, non-perishable food, flashlights, a battery-powered radio, a first-aid kit, and medications. Learn how to shut off your gas meter and where your main electrical breaker is.
8. Know your local risk. Check with North Carolina Emergency Management and your county emergency management office for local preparedness information.

During an earthquake, Ready.gov advises you to Drop, Cover, and Hold On: get down on your hands and knees, cover your head and neck under a sturdy table or desk, and hold on until the shaking stops. If you are outdoors, move away from buildings, streetlights, and power lines. If you are driving, pull over to a clear spot and stay in your vehicle.

Frequently asked questions

Are earthquakes common in North Carolina?

North Carolina experiences small earthquakes from time to time, but large, damaging quakes are less common than in high-hazard states. The state is rated 2 out of 5 for earthquake risk. Still, the 2020 Sparta earthquake and shaking from regional events like the 2011 Virginia earthquake show that North Carolina can feel and occasionally suffer damage from earthquakes. The western mountains, central Piedmont, and parts of the coastal plain are the most exposed areas.

Does homeowners insurance cover earthquake damage in North Carolina?

Usually, no. Standard homeowners insurance policies in North Carolina generally exclude earthquake damage. You typically need a separate earthquake policy or an endorsement. Talk to your insurance agent about whether coverage is available, what deductible applies, and whether it covers foundations, chimneys, and masonry. FEMA disaster assistance may help after a declared event, but it is not the same as insurance.

What should I do during an earthquake in North Carolina?

Follow the guidance from Ready.gov and FEMA: Drop, Cover, and Hold On. Get under a sturdy table or desk, protect your head and neck, and stay there until the shaking stops. If you are indoors, stay away from windows and heavy furniture. If you are outdoors, move to an open area away from buildings and power lines. After the shaking stops, check for injuries, gas leaks, and structural damage, then follow instructions from local emergency officials.

Official resources

• North Carolina Emergency Management – state preparedness, response, and recovery information.
• USGS Earthquake Hazards Program – earthquake science, maps, and real-time information.
• Ready.gov – Earthquakes – federal guidance on what to do before, during, and after an earthquake.
• FEMA Earthquake Safety – risk management and safety resources for homes and communities.