grid operators can adjust things so the forecasts help, but every once in a while there is a storm so big that it could cause essential low a global black out. the last one happened about 150 years ago in 1859, and that s the thing people are really worried about. that s what you want to see coming. think ou things are in washington d.c. right now. imagine instead of earth weather knocking out power in one city. space weather knocking out power across the world, that s what people are worried about. martha: how likely is that. we know it happens and we notice doesn t happen that often. with more satellites like the one you re seeing. there is a japanese satellite and an american satellite, they are watching and monitoring and trying to give us advance warning. but honestly, you know, advance warning the earth could fit in one of those little loops. if it acts up there is not much