Apparently, they were right:
A small (10 meter wide) asteroid will pass by the Earth Wednesday, at 12:47 UT. This tiny rock, called 2010 AL30, will pass us at a safe distance of 130,000 km (80,000 miles). As cosmic encounters go, this is a hair’s breadth, but in human terms it’s a long way off; as this graphic makes clear. It’s about a third of the way to the Moon.
Asteroid To Pass Earth Harmlessly Wednesday
It's well after 12:47 UT now, and the only explosions I'm aware of had the usual man-made causes.
I guess that science stuff really works after all.