About half an hour ago.
The weird thing is how I found out.
As soon as it happened, thousands of people in LA started tweeting, and their tweets (naturally) included the word "earthquake". That showed up (suddenly) as the most tweeted word on Twitter.
I happened to be on Twitter when that happened; I went to the TV news — nothing. News sites on the web — nothing.
Strange world we live in, when I can read accounts of what happened instantaneously from thousands of eyewitnesses, circumventing mass media altogether.
One wonders what role Twitter would have played on 9/11.
Are the days of CNN and MSNBC numbered?