tokyo. >> recall, nagano is the site of the 1998 winter olympics. it's a 6.6 magnitude quake which is a serious quake for an aftershock. chad is working on getting information. >> it certainly would be an aftershock, along a separate seam or separate part of the fault system still here. it wouldn't be anything other than, you know, looking at 8.9. 8.9 shakes a lot of the world. all the seismographs across the u.s. were shaking yesterday because of the shake on the other side of the globe. >> when you say a separate seam, what -- is that a fault? you mean a separate fault? >> sorry, a separate fault. a separate area where crusts and parts of the crusts are still grinding against each other. where this was a big subduction zone fault we had yesterday that lifted up and pushed the water away causing a sue na tsunami. there are other fault s along te