Earthquakes risk in Colorado

You’re at a closing table in Golden, and the seller’s disclosure mentions “earth movement.” Or you’re in Grand Junction, looking at a house with a beautiful view of the Book Cliffs, wondering if the ground ever moves. Colorado isn’t the first state people picture for earthquakes, but it has them. The statewide rating is 2 out of 5. That’s low, but “low” isn’t “never.”

Why Colorado looks like this

Colorado sits in the middle of the North American plate, not on a plate boundary like California. That’s why our quakes tend to be smaller and less frequent. But the state is still cut by faults. The Sangre de Cristo fault zone in southern Colorado, the Front Range near Denver and Boulder, and parts of the Western Slope around Mesa, Montrose, and Delta counties have all produced felt earthquakes. The USGS has recorded damaging quakes in Colorado history, including one in the late 1800s that cracked walls and toppled chimneys. We don’t get magnitude 7s every week, but a magnitude 4 or 5 can still knock bricks off a chimney and crack a foundation.

Some of the most active areas are in the mountains and the western part of the state. Counties like Custer, Saguache, Fremont, Teller, and Las Animas show up on seismic maps. The Raton Basin, down by Trinidad, has had swarms. The Front Range from Larimer down to El Paso has occasional small events. If you live in a newer subdivision on the plains, your risk is lower. If you live near an old fault or on a steep mountain slope, it’s higher.

Insurance gaps people miss

Here’s the part that surprises almost everyone: your standard Colorado homeowners policy does not cover earthquake damage. It excludes “earth movement.” That includes earthquakes, but also landslides and sinkholes. You need a separate earthquake policy or an endorsement added to your homeowners policy. Most Colorado insurers offer it, but many homeowners don’t buy it because the deductible is high. Typical earthquake deductibles are a percentage of your dwelling coverage—often 10% to 15%. That can mean tens of thousands of dollars out of pocket before insurance pays.

Your mortgage lender usually won’t require earthquake insurance in Colorado. That’s different from flood insurance in a high-risk flood zone, which lenders do require. And don’t confuse the two. Flood damage from a broken pipe or a storm is a separate issue. Earthquake damage is its own exclusion. Renters need a separate earthquake endorsement for their belongings, too. If you’re buying a house, ask your agent one direct question: “If the ground shakes and my foundation cracks, what pays?” Get the answer in writing.

A practical weekend plan

If you only do one thing this weekend, strap your water heater to the wall and bolt your tallest bookcase to a stud. That’s the highest-return hour you can spend on earthquake prep in Colorado. A falling water heater can start a fire or flood a basement. A toppled bookcase can block your exit.

Then do these:

• Walk your house and look for unreinforced brick chimneys, heavy mirrors over beds, and tall furniture that isn’t anchored.
• Learn where your gas shutoff valve is and keep a wrench near it. Only shut it off if you smell gas or see a broken line.
• Take photos or a video of every room, closet, and the exterior. That’s your claim documentation if you ever need it.
• Text your insurance agent about an earthquake endorsement. Ask about the deductible and whether it applies to the dwelling, contents, or both.
• Build a basic kit: water, nonperishable food, flashlight, batteries, first-aid supplies, medications, and a phone charger. Ready.gov has a full list.

If you live in an older home in Boulder, Cañon City, or Trinidad, spend extra time on the foundation and cripple walls. If you’re in a newer build on the Eastern Plains, your risk is lower, but securing furniture still makes sense. Earthquakes don’t send invitations.

Questions we get

Does Colorado actually have earthquakes?

Yes. The USGS records small earthquakes in Colorado every year, and the state has a history of moderate, damaging quakes. The risk is concentrated in the western mountains and along the Sangre de Cristo and Front Range fault systems. Statewide, it’s a level 2 out of 5—lower than California or Alaska, but not zero.

Is earthquake insurance required in Colorado?

Usually no. Mortgage lenders generally don’t require earthquake coverage in Colorado the way they require flood insurance in a high-risk flood zone. But if you want protection, you have to ask for it. It’s typically a separate policy or an endorsement, and it comes with a percentage deductible.

What if I rent in Colorado—does my renters insurance cover earthquakes?

Most standard renters policies exclude earthquake damage just like homeowners policies do. You can often add an earthquake endorsement to cover your personal property. Your landlord’s policy covers the building, not your stuff. Ask your renters insurance company directly.

Official maps and agencies

Don’t take our word for it. These are the sources we use when we update this page:

• Colorado Division of Homeland Security and Emergency Management — state emergency info and preparedness guidance.
• USGS Earthquake Hazards Program — real-time maps, fault data, and hazard maps for Colorado.
• Ready.gov – Earthquakes — what to do during and after a quake.
• FEMA Earthquake Safety — mitigation and safety resources.

You can also check state geological maps for local fault maps, but the state emergency agency and USGS are the first stops. If you’re buying a home in a higher-risk county, print the USGS hazard map for your area and bring it to your insurance agent. Ask what an earthquake endorsement would cost. Then decide if the percentage deductible is worth it for your budget. For most Colorado homeowners, the answer is a personal one—but at least now you know to ask.