【Explained by a Former Firefighter】Earthquake-Induced Landslides: Staying Safe Indoors

After major earthquakes, landslides often occur minutes to days later. Many people believe landslides are only an outdoor threat, but I have seen indoor injuries and fatalities caused by secondary ground movement. As a former firefighter who responded to earthquake-related slope failures, I explain how to stay safe indoors when landslide risk exists.

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■① Why Landslides Happen After Earthquakes

Earthquakes trigger landslides because:

• Ground layers loosen and lose stability
• Cracks form beneath buildings
• Aftershocks worsen weakened slopes
• Rainfall after quakes accelerates collapse

The danger continues long after shaking stops.

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■② The Most Dangerous Assumption: “If I’m Inside, I’m Safe”

People underestimate risk because:

• Buildings feel stable
• Movement outside looks worse
• Landslides are thought to be instant

As a firefighter, I saw homes shift or partially collapse hours later.

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■③ Identifying Indoor Warning Signs of Landslide Risk

Early signs include:

• New cracks in walls or floors
• Doors or windows suddenly sticking
• Sounds of cracking or ground movement
• Objects rolling without shaking

These signs require immediate caution.

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■④ Choosing Safer Indoor Locations

Not all rooms are equal:

• Move away from downhill-facing walls
• Avoid rooms closest to slopes
• Stay near interior load-bearing walls

Firefighters often advise vertical safety within structures when evacuation is unsafe.

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■⑤ When Staying Indoors Is Safer Than Evacuating

Staying inside may be safer when:

• Slopes are unstable outside
• Debris movement is ongoing
• Nighttime visibility is poor

Unplanned outdoor movement increases injury risk.

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■⑥ When Immediate Evacuation Is Necessary

Leave immediately if:

• Structural deformation increases
• Loud ground movement is heard
• Authorities issue slope evacuation orders

Delayed evacuation after slope movement is often fatal.

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■⑦ Firefighter Lessons From Landslide Responses

From field experience:

• People injured themselves rushing outside
• Calm observation prevented unnecessary movement
• Early slope awareness saved lives

Landslide survival depends on judgment, not speed.

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■⑧ Preparing Homes Near Slopes in Advance

Preparation reduces risk:

• Know slope direction and exits
• Identify safe interior areas
• Monitor weather after earthquakes

Landslide readiness begins before movement occurs.

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■Summary｜Landslides Threaten Indoors and Outdoors

Earthquake-induced landslides are not immediate-only hazards. Indoor awareness and controlled decisions prevent secondary injuries.

Conclusion:
As a former firefighter who responded to earthquake-related landslides, I can say clearly that staying safe indoors requires awareness, patience, and correct positioning. People who recognize warning signs and avoid unnecessary movement survive. After earthquakes, the ground—not the building—often decides the danger.