An earthquake hit Los Angeles this morning (5.4 Magnitude), and here are a few places on the web you can go for more data:
USGS Main Website
KNBC Live Stream (LA TV Station)
LA Fox 1 Live Stream
LA Fox 2 Live Stream
The Live Streaming pages require a broadband connection and probably Windows Media Player.
**update** 5.04 PM I noticed on the live feeds that the reporters are calling this quake the Chino Hills quake. Also...LA Fox 2 is not active currently. It may be brought back up in case of breaking news.