How many earthquakes happen every year?______.

Over one million earthquakes happen every year. But most of them are too small to notice. An earthquake can happen on land or under water. A major quake may last for only a minute, but it can kill thousands of people. It also may destroy a whole town or village. On 1 September, 1923, a huge quake hit two Japanese cities. Only about 1% of buildings were damaged. But great fires broke out in this disaster. The fire burned the wood and paper houses. Moreover, the fire killed thousands of people, and half a million people became homeless. September lst is now remembered as Disaster Prevention Day in Japan. On this day, some persons will show people how to put out fires and use emergenecy equipment.