Which pair of observations helps warning centres assess tsunami danger?

• Wind speed offshore and the heights of wind-made waves
• Earthquake shaking and changes in ocean water level
• Daily tide patterns and the amount of rain at the coast

Which feature uses special bearings beneath a building to reduce shaking passed into it?

• Base isolators beneath its base
• Flexible joints within its upper frame
• Diagonal braces across its upper walls

Communities use drills to practice earthquake protection and evacuation for tsunami or eruption danger.

A warning centre receives data about a large offshore earthquake. What should happen next in its warning process?

• Assess tsunami danger and issue any needed warning
• Wait for a coastal observer to see an approaching wave
• Send the same warning to every coast after each quake

Which frame design helps a building handle movement during earthquake shaking?

• Joints that stay fixed until the frame cracks apart
• A frame that bends more and more without any limit
• A frame designed to bend a little without breaking

In the official warning process shown, which step comes before the risk check?

• Send a warning to coastal communities
• Collect measurements from instruments
• Practice the town's evacuation route

An engineer says, "Base isolators guarantee this building will never suffer earthquake damage." Which reply fits the lesson?

• They reduce shaking, but damage is still possible
• They stop cracks, so only the windows can be damaged
• They protect buildings equally on every kind of ground

A town has working tsunami sirens, but residents have not learned evacuation routes. Which change addresses that gap?

• A plan to wait at home until everyone hears the siren
• A rule to use the nearest road without checking a map
• Teaching and drills using local evacuation routes