Hydrogen Blast News Today : Breaking News, Live Updates & Top Stories | Vimarsana

There. the signature of this explosion only looked to the seismographs out there about the size of these things here. that's why they say we don't think of it as a hydrogen blast. but if they picked up some information that gets them closer to that, again, kate, you can see why the whole world is watching and concerned about this. >> that is a startling comparison when you line them up like that, tom. thank you so much. wow. "outfront" for us next, donald trump and ted cruz, the two gop front-runners both speaking to cnn tonight as there are new questions about ted cruz's citizenship. plus...

Korea. they want to at least keep it at bay but keep a closer eye on it. they don't know what would follow if the regime collapsed and if there were an exodus of migrants across the border. that's been their play, and they have clearly let some of this material -- sanction material get across the border. that's the border that is the more porous into north korea. that said, the u.n. is going to have to do something because this is another very clear violation. no matter what kind of test this was, a low-yield nuclear test which they have done three times before, it still is a violation of exis...

Seen the level of radioactivity's declined some time after. >> reporter: the level of radiation does seem to spike. it declines and rises rapidly again. why do your knowledge is this happening? >> reporter: well, this is something that is difficult for us to identify at this juncture. we are looking into what is the actual causes for those radioactivity. in the past where we saw a blast over hydrogen blast, we found out that that was the result of venting to emit air from inside, which would contribute to control the pressure inside. >> there are reports today that white smoke or perhaps steam...

And there goes your first barrier. the second barrier in one of these reactors is the containment itself, and that containment was damaged in a hydrogen blast, so they now have a clear pathway, and they are committed to continuing releases. they might get through this without huge additional releases. they are certain to have to keep releasing radioactive materials for some time to come. >> matthew, how much can we trust the japanese government to tell us the truth? >> well, the tokyo electric power company has not been always as we would say in america transparent. on the other hand, we do ha...

Let's bring you up to date with the latest from japan. and six people injured in a new explosion today in the northeast of the country. it was a hydrogen blast occurring at the building that houses the number three reactor at the fukushima nuclear plant. this is where most of the crisis has been unfolding on this story. officials say the number three reactor was not damaged in that explosion today. and japanese media are also quoting japan's nuclear safety agency. they're saying the cooling system of reactor number two at the same plant stopped working early this day and the pressure has been ...