“Once again we must confront a powerful blow from nature,” President Michelle Bachelet said in an address to the nation late Wednesday. Officials said schools would be kept closed in most of the country Thursday. After the initial earthquake, aftershocks with magnitude 7 and 6 followed. Fortunately, the numerous measures – part of a national emergency plan adopted after the earthquake disaster in 2010 – demonstrated efficiency and the earthquake’s impact was much smaller this time. The strongest earthquake ever recorded on Earth happened in Chile , a magnitude-9.5 tremor, was in 1960. 15ft waves were detected off the Chilean coast and evacuations were decided in many areas. Three-feet waves are expected to hit the coast of New Zealand by midnight local time. A tsunami is possible, but it doesn’t mean it will happen, said to the media Chevy Chevalier, a meteorologist with the National Weather Service in Honolulu.