If it had a blue-green tail it was most probably a meteor. They are quite common. Lower atmosphere burners are quite spectacular because they are the size of a pebble after entry and they burn quite bright because of its` composition. If you are at the right place at the right time and looking in the right direction, you`ll see them from time to time. Probably 95% go undetected by anyone. Fact is, there are appox. 3-12 actual "small" meteor strikes per month around the world. These meteorites are very small and cause very little damage if at all. It`s those big ones I worry about... :-)