6 Hidden Effects of Earthquakes on Your Home

By Bridget Coila

July 17, 2025

You're enjoying a quiet afternoon nap or eating dinner with your family. The next thing you know, the whole world is shaking and you're diving under a table or taking shelter in a sturdy doorway. If you live in an earthquake-prone area, this might be a familiar pattern. Checking over your home after an earthquake is another part of the routine.

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When it comes to common earthquake effects on a home, not all signs of damage are obvious at first. Read on to learn more about the subtle issues that can develop after a quake and how to fix minor quake damage.

What Are Some Not-So-Obvious Effects of an Earthquake on Your Home?

So, your home has just been through an earthquake. The structure looks fine, and your house isn't shifted a few feet over or straddling a huge crack in the ground, but you want to make sure there's no hidden damage. Here are five things to look for when you're searching for hidden earthquake home damage.

1. Minor Foundation Problems

Even if your home foundation seems stable, there may be small signs that hidden problems exist below your home. Misaligned doors and windows and cracks in bricks on your home exterior could indicate an underlying problem with the foundation. In some cases, signs don't develop until weeks or months later. The house could shift over weeks or months if the ground beneath was affected by the quake.

2. Plumbing Issues

Pipes and sewer lines could become misaligned or damaged after an earthquake. While a major leak might be obvious, a more subtle problem could go unnoticed. Unexplained water pooling in or around your home or unusual drops in water pressure could indicate an issue with your plumbing. Pay particular attention to appliances that use water, such as your water heater, dishwasher and washing machine. A quake could have loosened the connection between the appliance and water line, leaving you with a mess the next time you want to use the appliance.

3. Gas Line Damage

If you use natural gas to heat your home or run appliances, check the gas lines after an earthquake. Leaks may not be obvious because there are no water stains or pooling moisture to indicate a problem. If your gas provider adds a scent to the natural gas that flows to homes, you may notice a rotten-egg smell from a damaged gas line. In some cases, the leak may be too small to spread the scent but could still put you at risk of a fire or explosion. If you have any reason to suspect a gas leak, vacate the home until you can have the line checked.

4. Electrical System Failures

Wiring and electrical components could get shaken out of place during an earthquake. This could lead to electrical failures and an increased risk of fire. If you smell smoke or see sparks when using an outlet, light fixture or electrical appliance after an earthquake, turn off the electricity in your home and have the lines inspected for damage.

5. External Structures

Check outbuildings, chimneys, driveways, decks, pools and patios for damage in addition to inspecting the home's main structure. Loose bricks and damaged masonry could pose a danger later, and small cracks in tile or concrete surfaces could develop into larger problems if the damage isn't addressed shortly after the quake.

6. Terrain Changes

If your home is on a hillside or cliffside, inspect the terrain around your house after a quake. Watch for loose rocks at elevations above your home that could fall downward onto your structure or into your yard. Check for any instability at lower elevations that could undermine your foundation or cause your home to slip down the slope later. Also, look for any trees with damage that could cause them to topple.

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Is a Post-Earthquake Inspection Necessary?

Because earthquake structural damage can be subtle, inspecting your home after the shaking stops is essential. You may want a professional inspector to look over the house after a tremor or other natural disaster. A professional knows what to look for regarding an earthquake's effects on home stability and may notice things you'd miss.

Mitigating Earthquake Effects on a Home

Prevention helps reduce the likelihood your home will incur damage during an earthquake. Anchoring your home to the foundation, reinforcing crawl spaces and adding braces to hillside homes could help prevent major earthquake damage. Consider installing an automatic shutoff valve on your gas line, bracing major appliances and using door locks on your refrigerator and cabinets to prevent items from spilling out during a quake.

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