Earthquake household safety
Earthquake Impact Explainer
Translate a reported earthquake magnitude, estimated distance, depth, what you felt, and building conditions into practical household checks and immediate post-quake actions.
Life safety first: if there are injuries, fire, gas smell, downed lines, collapse hazards, or an official evacuation/tsunami instruction, follow emergency services and local officials immediately.
This tool is informational decision support. It does not replace USGS earthquake information, local emergency management, utility instructions, 911/local emergency services, or a qualified structural inspection.
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Life safety first
Use caution and check for household hazards.
A magnitude 5.0 earthquake about 20 miles away can produce moderate to strong local shaking depending on distance, depth, soils, and building type.
- • Check yourself and nearby people for injuries before checking property.
- • If shaking is still happening, Drop, Cover, and Hold On; move only when the shaking stops and it is safe.
- • Follow local emergency alerts, evacuation instructions, utility notices, and official tsunami information where relevant.
- • This tool is informational and does not replace USGS event information, local emergency services, utility instructions, or a structural inspection.
Now
- Treat injuries, fire, gas smell, downed lines, and collapse hazards first.
- Leave damaged areas and keep people away from glass, brick, chimneys, and unstable furniture.
- Check local official alerts and emergency instructions.
Next hour
- Do a cautious exterior and interior safety sweep only where it is safe to do so.
- Photograph damage for records if it is safe; do not delay evacuation or urgent calls for photos.
- Check on neighbors who may need help without entering unsafe structures.
Today
- Secure heavy items that shifted, clean broken glass with protection, and move beds/seating away from damaged shelves or masonry.
- Monitor official updates for aftershocks, road closures, shelter information, and utility instructions.
- Arrange qualified inspection for concerning structural, chimney, gas, electrical, or water damage.
Before reoccupying
- Do not sleep or spend extended time in a building with structural red flags, gas/electrical hazards, or significant chimney/brick damage.
- Have qualified professionals evaluate structural, gas, electrical, chimney, retaining-wall, or foundation concerns.
- Confirm utilities are safe to use and exits are clear before returning to normal use.
What to check first
- Look for immediate hazards from a safe position: fire, gas smell, damaged wiring, broken glass, fallen furniture, unstable shelves, chimney/brick damage, and blocked exits.
- Put on sturdy shoes, gloves, long sleeves, and eye protection before cleanup if available.
- Open cabinets carefully; items may have shifted and can fall.
Gas / electrical / water safety prompts
- Gas: check only by smell, sound, and obvious appliance/pipe damage. Do not use matches, lighters, or electrical switches if a leak is suspected.
- Electrical: watch for sparks, burning smells, damaged panels, water near outlets, or downed service lines. Shut off power only if you can safely reach the breaker and know how.
- Water: look for broken pipes, water heater movement, sewage backup, or foundation-area leaks. Shut off water only if safe and needed.
Structural red flags
- New wide cracks in foundation, exterior walls, interior load-bearing walls, or around beams/posts.
- A building, porch, stairs, chimney, balcony, retaining wall, or garage wall that appears shifted, leaning, separated, or partly collapsed.
- Doors/windows suddenly jammed throughout the building, sagging floors/roof, or visible separation between walls and floors/ceilings.
- Falling hazards overhead: brick, ceiling materials, glass, cabinets, heavy fixtures, or damaged façade materials.
Aftershock readiness
- Expect aftershocks: move heavy/sharp items off beds, seating areas, and exit paths.
- Keep shoes, flashlight, phone, keys, medications, glasses, and a go-bag close by.
- Check exits, plan an outside meeting spot, and avoid standing near damaged chimneys, brick walls, windows, or shelves.
- If you re-enter briefly, keep the visit short and maintain a clear exit path.
Printable post-earthquake inspection checklist
Felt shaking drives the action level more than magnitude alone because damage at one address depends on distance, depth, soil, building design, and contents.
wood-frame house selected: use that as context, not a structural diagnosis. Only qualified inspectors can determine whether a building is safe to occupy.
How to use this safely
Earthquake magnitude is only one clue. USGS-style public concepts distinguish the earthquake size from shaking and impact at a specific place. Your felt shaking, visible damage, building type, soil, hillside/coastal location, and utility hazards should guide immediate actions.
For official event details, use USGS earthquake information. For alerts and local instructions, use local emergency management, utility providers, NOAA/NWS tsunami products where relevant, and the HazardNow dashboard as a situational-awareness starting point.
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