Last weekends meteor over the east coast U.S. was not uncommon according to NASA:
Boulder-Size Asteroid Caused Friday's East Coast Meteor, NASA Says.
By Mike Wall | SPACE.com – Sat, Mar 23, 2013
http://news.yahoo.com/boulder-size-asteroid-caused-fridays-east-coast-meteor-194918370.html
It's estimated about 100 of these meter-sized boulders hit the Earth's atmosphere every year; this one was uncommon in being over a heavily populated area. The fireball over the Bay Area in California in February also was not an uncommonly large one.
However, there may be a characteristic of the east coast meteor that is uncommon, and that is its speed. It's been estimated to have been traveling at perhaps 20 miles per second:
Fiery meteor streaks across Massachusetts’ night sky, seen up and down the East Coast
03/22/2013 11:58 PM
East coast residents marvel at Friday night meteor.
Mar 23, 2013 5:32 PM EDT Updated: Mar 23, 2013 6:03 PM EDT
The distance from Boston to New York is 190 miles. The meteor was seen from Boston to New York. Then fixing the time by video cameras when it appeared over Boston compared to New York would give us an accurate idea of its speed.
IF it really was traveling at 20 miles per second then that would put it in an unusual category since that would put it at the highest speed ever measured for a meteor:
64,000 mph asteroid was fastest on record.
By Brian Dodson
December 30, 2012
Sutter’s Mill Meteor Fastest, Most Diverse Ever.
December 21, 2012 at 04:57 Merryl Azriel
http://www.spacesafetymagazine.com/2012/12/21/sutters-mill-meteor-fastest/
A speed of 20 miles per second for the east coast meteor would put it slightly ahead of the Sutter's Mill meteor which was at 64,000 mph, 17.8 miles per second.
NASA is putting up a list of bolides, fireballs on its NEO web page:
Fireball and Bolide Reports.
http://neo.jpl.nasa.gov/fireballs/
So far it only has the the Chelyabinsk meteor on the list. I think it should also include meteors of size as the east coast and Bay Area meteors, even if ones this size occur a hundred times a year. Such events may still have unusual characteristics that would be uncovered by open dissemination of their physical aspects.
The American Meteor Society has released an analysis of the number of reports made to them by the public of fireballs over the last few years. They conclude that while there has been a definite increase, because of the increasing awareness and the technical tools to report such events, no conclusion can be made about whether this represents a real increase in the number of events:
Fireball Tracking System Analysis.
Analysis of the AMS Citizen Science Based Fireball Tracking System.
http://www.amsmeteors.org/fireballs/fireball-tracking-system-analysis/
Bob Clark