Safety & Emergency Natural Disasters

Question 1

During an earthquake, what is the recommended protective action if indoors?

Accepted Answer

Drop, cover, and hold on under a sturdy table or desk

Answer

FEMA and USGS recommend Drop, Cover, and Hold On as the most protective action during earthquake shaking — doorways offer no special protection.

Question 2

What scale measures the magnitude of an earthquake based on seismic wave energy?

Accepted Answer

Moment Magnitude Scale (Mw)

Answer

The Moment Magnitude Scale (Mw) is the current scientific standard for measuring earthquake magnitude, having replaced the Richter scale for large events.

Question 3

What is the primary sign of an approaching tsunami after a coastal earthquake?

Accepted Answer

Rapid and unusual retreat of the sea from the shoreline

Answer

A sudden, unusual withdrawal of the sea exposes the seafloor and signals the first trough of an incoming tsunami — immediate high-ground evacuation is required.

Question 4

At what wind speed does a tropical storm officially become a hurricane?

Accepted Answer

74 mph (64 knots)

Answer

A tropical cyclone reaches hurricane status when sustained winds reach 74 mph (64 knots or 119 km/h), classified as Category 1 on the Saffir-Simpson scale.

Question 5

What is storm surge in the context of hurricanes?

Accepted Answer

An abnormal rise of water generated by a storm's winds pushing water onto shore

Answer

Storm surge is the abnormal coastal flooding caused by hurricane winds pushing massive amounts of ocean water inland, historically the deadliest hurricane hazard.

Safety & Emergency Practice Test

Safety & Emergency Practice Test

Safety & Emergency Natural Disasters