Earthquakes risk in Mississippi

Earthquake risk in Mississippi: an overview

Mississippi's earthquake risk is generally lower than that of many other states, but it is not zero. According to FEMA, the state has a moderate-to-low earthquake hazard, with the greatest risk concentrated in the northwestern corner. This area lies within the influence of the New Madrid Seismic Zone, one of the most active seismic zones in the central United States. The zone produced a series of powerful earthquakes in 1811–1812 that were felt across a vast region, including Mississippi.

Earthquakes can occur at any time of year; they are not seasonal. The most exposed counties include those along the Mississippi River in the northwest, such as DeSoto, Tunica, Tate, Panola, and Marshall. However, a large earthquake in the New Madrid Seismic Zone could cause shaking throughout the state. The USGS Earthquake Hazards Program provides maps showing that the probability of damaging shaking decreases as you move southeast across Mississippi.

In addition to the New Madrid Seismic Zone, Mississippi has some minor fault lines and has experienced small earthquakes. The Mississippi Embayment, a geologic basin filled with soft sediments, can amplify ground shaking, potentially increasing damage in areas near the river. While the probability of a major earthquake in any given year is low, the potential consequences make it worth preparing for.

How it affects homes

Earthquake damage to homes in Mississippi would most likely result from strong shaking. Typical impacts include cracked foundations, walls, and ceilings; broken windows; damaged chimneys; and fallen objects. Older homes, especially those with unreinforced brick or masonry, are more vulnerable. Homes built on soft soils or near the river may experience stronger shaking. Even moderate shaking can cause cracks in drywall and plaster, and unsecured objects can fall, posing injury risks.

Standard homeowners insurance policies typically do not cover earthquake damage. In Mississippi, you may need to purchase a separate earthquake policy or add an endorsement to your existing policy. According to the Mississippi Emergency Management Agency, earthquake coverage is available from many private insurers. Premiums vary based on location, home age, construction type, and deductible. While the overall risk is lower than in high-hazard states, the cost of coverage may still be reasonable. After a federally declared disaster, FEMA assistance might be available, but it is not a substitute for insurance.

How to prepare your home

Taking steps to strengthen your home can reduce earthquake damage. Consider these measures:

• Secure heavy furniture and appliances: Anchor bookcases, cabinets, TVs, and water heaters to wall studs. Use flexible straps for water heaters.
• Brace and bolt: If your home has a crawlspace, ensure the sill plates are bolted to the foundation and add bracing to cripple walls. This helps prevent the house from shifting off its foundation.
• Reinforce chimneys: Unreinforced masonry chimneys can collapse. Have a professional evaluate and reinforce your chimney.
• Install cabinet latches: Use childproof or earthquake latches to keep cabinet doors closed and prevent items from falling.
• Secure breakables: Store heavy items on lower shelves and use museum putty or earthquake gel to hold items in place.
• Check gas and electrical connections: Ensure your water heater and other gas appliances have flexible connectors. Know how to shut off gas and electricity if needed.
• Consult a professional: A licensed engineer or contractor can assess your home's structural weaknesses and recommend specific retrofits.
• Create a disaster kit: Include water, non-perishable food, medications, flashlight, radio, and first-aid supplies. Have a family communication plan.
• Practice Drop, Cover, and Hold On: During an earthquake, drop to the ground, take cover under a sturdy table or desk, and hold on until shaking stops.

For more detailed guidance, see Ready.gov – Earthquakes.

Frequently asked questions

Does Mississippi have earthquakes?

Yes, although they are less frequent and generally less severe than in states like California. The northwestern part of Mississippi is affected by the New Madrid Seismic Zone, and smaller earthquakes occur from time to time. The USGS monitors and records seismic activity in the region.

Is earthquake insurance required in Mississippi?

No, earthquake insurance is not required by law. However, standard homeowners policies exclude earthquake damage, so if you live in a higher-risk area—particularly northwest Mississippi—you should consider purchasing a separate policy or endorsement. MEMA recommends discussing coverage options with your insurance agent.

What should I do during an earthquake?

Drop, Cover, and Hold On. If you are indoors, get under a sturdy piece of furniture, protect your head and neck, and hold on until the shaking stops. If you are outdoors, move away from buildings, streetlights, and utility wires. If driving, pull over to a clear spot and stop. For more, see Ready.gov.

Official resources

• Mississippi Emergency Management Agency (MEMA)
• USGS Earthquake Hazards Program
• Ready.gov – Earthquakes
• FEMA Earthquake Safety