On January 28, a bolide, or large meteor, streaked across the US Northeast. Now, on March 25, another similar meteor has been seen from Maine to Florida. In neither case did the objects cause any damage, but they may be part of an unknown shower of large meteors which has been affecting Earth, which includes the large Russian meteor of February 15, which exploded in the atmosphere with the force of 50 Hiroshima sized bombs.
While some effort has been made to identify asteroids that may be dangerous to Earth at some point, these objects are not asteroids and cannot be tracked as they approach our planet. There is no way of knowing how many more may be out there, or when or where they will strike. Large meteors such as the one that struck in Russia are extremely rare. This was only the second such strike in a hundred years.