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Trough in the east pushing farther south. that's why those areas got hit by cold weather from canada. >> they are associated with that one-way pattern so they are connected in that sense. >> reporter: experts say that no of the jet stream that's driving those severe weather patterns into the south and dumping piles of snow here in the mid-atlantic is also slower moving this year than in you're past. holding those severe weather patterns longer over this area and in places like great britain which caused severe flooding there. the wettest january in 2 1/2 centuries. >> whoo! >> reporter: and, y...

And yes that same wave pattern is what made it almost summertime in sochi. why is it all so slow moving this year holding those severe weather patterns over us longer? >> nast an area of research that we're currently investigating. we don't have a clear cut answer to that question. and if we did, we would have a much more skillful prediction in the longer time scale, say, out to 1 to 2 months. >> reporter: another mystery? whether this is all connected to climate change or not. they're still trying to crack that code trying to find out if climate change impacts those jet stream patterns and ou...

Usual, which led to a trough in the east. that's why those areas got hit by cold weather from canada. >> they are associated with the long wave pattern, so they are connected in that sense. >> reporter: experts say the flow of the jet stream that's driving the severe weather patterns into the south and dumping piles of snow here in the midatlantic is also slower moving this year than in years past holding those severe weather patterns longer over this year and in places like great britain. which caused severe flooding will. the wettest january in two and a half centuries. and yes, that same wa...

It's clear. aftershock, we treat like a regular quake and assess the damage of each one individually. >> again, for clarification, you said a tsunami was generated, there were readings a tsunami was generated following this earthquake? >> caller: by tsunami, i don't necessarily mean killer wave, we don't know that. there is a wave generated by that earthquake and we're watching that one travel up the coast of south america right now. >> with regards to this particular wave you just mentioned, can you give us a sense in terms of how different is it from the normal wave pattern? i understand tha...