Nope. This might be the second largest impact in last 100 years, and it occured recently- last year. It took some time to investigate. I think recall hearing about and their plans to search for it.
Though not sure how it compares in size to one in Greenland, or other impactors.
http://abob.libs.uga.edu/bobk/ccc/cc060703.html
"The meteorite fell in the early hours of September 25, 2002, between the town of Bodaibo and the village of Balakhninsky near the Vitim River.
The incident caused strong tremors in the region, similar to those of an
earthquake. Sporadic flashes of light were seen over the crash site.

The expedition members said that this is the second largest meteorite,
after the famous Tunguska meteorite, to fall on Russian territory."

And this is alway cute to remember:
"IF IT had hit Central London, Britain would no longer have a capital
city. The force of the meteorite that hit eastern Siberia last September
destroyed 40 square miles of forest and caused earth tremors felt 60
miles away."
A bit of an exggeration- might not have destroy everything and everyone in London, though certainly wreck a Londoners day:) If this one had hit in middle of LA, I might sleep through it:)

-gb, about 30 miles from center of LA