The first one peaked at 7:42 a.m . ET Tuesday , followed by a second , lesser blast at 8:52 a.m . ET . the National Oceanic and Atmospheric Administration 's releases images of `` significant '' solar flares recent years . The second peaks at 7:42 a.m . ET , with a second , lesser blast at 7:42 a.m . ET . The explosions might disrupt high-frequency radio communications on Earth .
the National Oceanic and Atmospheric Administration 's releases images of `` significant '' solar flares recent years . The second peaks at 7:42 a.m . ET , with a second , lesser blast at 7:42 a.m . ET . The explosions might disrupt high-frequency radio communications on Earth .