I found this one:
http://earthquake.usgs.gov/earthquakes/dyfi/events/ci/14563188/us/index.html

not a 5.5 - but a 2.1 within seconds of the other 5.5 - about the same location

I also don't remember any 5.5 here and I would have felt it.

Canie

At 02:23 AM 1/11/2010, you wrote:
>Hi Gang,
>                Seasons greetings from the "land down under"
>
>   just been catching up on december quake reports from the USGS site
>and found a report that seems to be unsubstantiated
>
>http://neic.usgs.gov/neis/bulletin/neic_qpcu.html
>
>A M5.5 in the Whittier area SW of downtown LA,   it must surely be incorrect
>specially as far as magnitude is concerned.   There are no record 
>files in Larry's
>database showing that any of you guys recorded the event.
>the felt report of MMII doesnt fit a M5.5 at 11 km depth, it would 
>have been quite
>strong and damaging .... maybe it was a M2.5  ???
>
>the mind boggles   ;)
>
>Dave N
>Sydney
>Oz
>
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