there's simply no relief for japan. another powerful earthquake hit the country today exactly one month after much of northern japan was devastated by a major quake and tsunami. cnn's kyung lah joins us from tokyo. >> reporter: japan was rocked by a series of earthquakes. these are aftershocks and the strongest of the aftershocks was a magnitude 6.6. according to the usgs. and what really got people concerned is that it was very close to the fukushima daiichi nuclear plant, that's the crippled nuclear facility. it caused the evacuation of the nuclear plant. plant also power. power being so critical here, that meant that the plant wasn't able to for about 50 minutes keep pumping cool water on to those reactors, one, two and three, which are all damaged. without that water the dern was