Earthquakes risk in Maine

Maine's earthquake story: small shakes, rare damage

You're signing papers on a 1920s farmhouse in Oxford County, and your agent slides over a form. It asks if you want earthquake coverage. You pause. Maine? Earthquakes? The truth is yes, but not the kind that levels cities. Maine sits on the edge of a seismic zone, and the state gets a handful of small quakes each year. Most are too weak to feel. The Maine Emergency Management Agency (MEMA) rates the statewide risk as level 2 out of 5 — low, but not zero. That rating matters when you're deciding what to fix first.

If you live in Cumberland, York, or Penobscot County, you're in the same boat as the rest of the state. The risk is spread out. The Downeast coast, the Midcoast around Penobscot Bay, and the western mountains all see occasional tremors. Aroostook County up north? Also low. But low doesn't mean never. USGS records show Maine has felt earthquakes every few years, usually magnitude 3 or less. Sometimes a 4.0 will rattle windows in Portland or Bangor. Damage is rare, but it happens.

What actually happens to a house

In Maine, the typical earthquake damage isn't a collapsed building. It's cracked plaster, a shifted foundation, a chimney that separates from the wall. Older homes — the kind you find in Portland's West End, Bangor's Broadway, or any Maine town with pre-1950 housing stock — are more vulnerable. Unreinforced brick chimneys are the classic weak point. If your house has one, a modest shake can crack it. That's a repair bill, not a catastrophe, but it's real.

Soil matters too. Maine has a lot of bedrock near the surface, which can carry shaking farther than you'd expect. Soft soils in river valleys — along the Penobscot, Kennebec, or Androscoggin — can amplify movement. If your house sits on a slope or has a basement that already leaks, an earthquake could make those problems worse. But again, we're talking about small shakes, not the Big One.

Insurance reality: your standard homeowners policy almost certainly excludes earthquake damage. That's true in Maine and everywhere else. You need a separate earthquake policy or an endorsement. In a low-risk state like Maine, that coverage is often cheap, but deductibles are typically high — often a percentage of your home's value, not a flat dollar amount. Flood is separate too, and it's not covered by homeowners either. For hurricanes, wind damage is usually covered, but flood from storm surge is not. So if you're worried about a quake, call your agent and ask specifically about earth movement. Don't assume.

If you only do three things

If you have a weekend and a couple hundred dollars, here's what I'd do first. Skip the earthquake policy unless you have a brick chimney or a high-value home. Spend the money on the house itself.

1. Check your foundation. Walk the perimeter. Look for cracks wider than a pencil, especially at corners and where the foundation meets the frame. If you see something, get a structural engineer, not a general contractor.
2. Brace your water heater and gas lines. A tipped water heater can break a gas line, which is a fire risk after any shake. Strapping kits cost about $20 at any hardware store in Maine. Flexible gas connectors are also a good idea.
3. Secure tall furniture and your chimney. Bookcases, water heaters, and brick chimneys are the things that move. Anchor what you can. If your chimney is unreinforced and you have the budget, a mason can add a brace.

That's it. You don't need to retrofit your whole house for a level 2 risk. But those three steps cost little and cover the most common damage.

Questions we get

Does Maine actually get earthquakes?

Yes. USGS records show small earthquakes every few years, mostly in the eastern and coastal parts of the state. Most are magnitude 2 or 3 — felt by some, damaging to none. But a 4.0 or larger is possible, and that could crack chimneys and foundations in older homes.

Is earthquake insurance worth it for a Maine homeowner?

For a typical wood-frame house on a solid foundation, probably not. The risk is low, and the deductible is high. But if you own a historic brick building, a home with a large unreinforced chimney, or a property with a known foundation issue, it might be worth a quote. Ask your agent what an endorsement costs. You might be surprised.

What should I do first as a Maine homeowner?

Brace your water heater. It's the cheapest, highest-impact fix. Then check your foundation for existing cracks. If you have a brick chimney, get it inspected. Those three things take a weekend and cost less than a single insurance deductible.

Where to verify this

• Maine Emergency Management Agency — state hazard info and preparedness.
• USGS Earthquake Hazards Program — real-time maps and research.
• Ready.gov – Earthquakes — what to do during and after.
• FEMA Earthquake Safety — mitigation and risk management.

That's the whole story. Maine's earthquake risk is real but small. Treat it like you'd treat a nor'easter: prepare a little, don't panic, and check your insurance before you need it.