【Disaster Specialist Explains】Aftershock Safety｜“The Second Shock Often Causes the Most Dangerous Injuries”

Aftershocks occur hours, days, or even weeks after a major earthquake. They can cause weakened buildings to collapse, trigger fires, and create new landslides. As a disaster specialist, I explain how families can stay safe during this dangerous period when many people let their guard down.

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■① Expect Aftershocks—Do Not Assume the Danger Has Passed

After a major earthquake:

• Strong aftershocks are highly likely
• They may feel as powerful as the first quake
• They can trigger additional damage

Families must stay alert and avoid rushing back into unsafe areas.

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■② Stay Away From Damaged Buildings

Weakened structures can collapse suddenly. To reduce risk:

• Do not enter cracked houses or leaning buildings
• Avoid parking or walking near exterior walls
• Stay clear of falling glass and debris
• Wait for official safety inspections

Many injuries occur when people reenter homes too soon.

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■③ Protect Yourself During Every New Shake

When aftershocks strike:

• Drop to the ground
• Cover your head and neck
• Hold on to sturdy furniture
• Stay away from windows and heavy objects

Repeated practice helps families react instantly.

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■④ Check Utilities After Each Significant Aftershock

Aftershocks can damage lifelines even if they survived the first quake. Check for:

• Gas leaks
• Electrical hazards
• Water pipe ruptures
• Sewage backups

Turn off utilities when necessary and evacuate if you detect danger.

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■⑤ Prepare for Continued Evacuations and Disruptions

Aftershock sequences can last weeks. Families should:

• Keep emergency kits accessible
• Sleep away from unstable areas of the home
• Have shoes and flashlights near the bed
• Review evacuation routes regularly

Staying prepared prevents panic and confusion.

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■Summary

Aftershocks are a serious and often underestimated threat. By avoiding damaged structures, protecting yourself during new shaking, and monitoring utilities, families can stay safe throughout the entire aftershock period. Awareness and continued preparedness save lives long after the first earthquake ends.