What is tsunametre?

How many people can die in an F2 tornado? How much gun powder can a person store at home? What is fire alarm system and heat detection system? What should you do if you find a hazard in the workplace? Which tornado struck out the most people? Is baking powder is used as fire extinguisher? What is the opposite of collapse? Is it true that the smoke alarm batteries should be changed every year? How did the 1931 china floods happen? Does a natural gas leak set off carbon monoxide alarm? What is force load shedding? What town was Chernobyl in? How many tornadoes on April 9th 2011? What is STARVATION to put out a fire? How does public safety differ from personal safety? What is the difference in meaning between a crash in an accident? What to do during a tornado at school? What is THIRA? Are there tornadoes in the south east? What does F5 stand for?