NASA scientists say new data provided by twin spacecraft analyzing the sun will help them more accurately predict how so-called solar tsunamis wreak havoc on our planet. The tsunamis — powerful explosions known as coronal mass ejections, or CMEs — produce solar cosmic rays that can interfere with technology, causing power blackouts and disrupting air traffic communications and cell phone networks. NASA says images captured by its twin Solar Terrestrial Relations Observatory, or STEREO, spacecraft have enabled scientists to map the tsunamis in 3D to examine their structure, velocity, mass and direction.