Japan Aftershocks: How Long Will They Go On?
Apr 12, 2011; 12:48 PM ET The USGS define aftershocks as “earthquakes that follow the largest shock (“mainshock”) in an earthquake sequence.” These are smaller than the main shock and take place within a fixed distance of the epicenter. • Today Marks 50th Anniversary of Human Spaceflight Apr 12, 2011; 12:12 PM ET Today marks the 50th anniversary of human spaceflight, when the Soviet Union Vostok 1 spacecraft was launched into space. • Upcoming Snowstorm Adds to Wild April Apr 12, 2011; 11:17 AM ET Heavy, wet, accumulating snow will target the northern Plains later this week despite the calendar denoting we are several weeks into Spring. • Dangerous Weather Targets Storm-Weary Plains Apr 12, 2011; 10:50 AM ET A storm quietly crossing the northern Pacific Ocean will be responsible for more severe thunderstorms across the Plains as soon as Thursday afternoon. • Hundreds of Homes Destroyed by Tornadoes, Wildfires This Weekend Apr 12, 2011; 9:10 AM ET Wildfires and tornadoes highlighted the
