Step 1: Understanding the Concept:
Earthquake safety devices and practices reduce injury and damage both during the shaking and right after it. They fall into preparation tools and immediate-response actions.
Step 2: List the key devices and measures.
1. A sturdy table or desk to take cover under (the "duck, cover, hold" method), protecting the head and body from falling debris.
2. An emergency kit with a torch, first-aid box, whistle, and drinking water, kept ready at home or school.
3. A battery or hand-crank radio to receive emergency information when power is cut.
4. Fire extinguishers, to control fires that can start from damaged gas lines or wiring.
5. Earthquake-resistant building fittings, like flexible gas pipe connectors and furniture anchored to walls, to reduce damage before the quake even starts.
Final Answer:
Cover under sturdy furniture, an emergency kit, a battery radio, a fire extinguisher, and anchored furniture together form the main safety devices used during an earthquake.