[Lucius Cornelius Sulla]

Is there any thinking out there that this might be a pre-shock earthquake? That is, do they think this might be a preliminary earthquake to a much larger one coming in the next 48 hours or so?

[Redcloak]

No. This looks like a main shock (not a Northridge aftershock) followed by its own aftershocks. Pre-shocks don't act like this.

[ZGuy]

Unfortunately you only know if something is a "preshock" after the "postshock" hits! I'm not concerned though.

FYI - Simi Police Dept. has received very few calls. One man had a few items fall from his shelves and some items broke.

[dpwiener]

That is, do they think this might be a preliminary earthquake to a much larger one coming in the next 48 hours or so?

While that's always a possibility, it's highly unlikely. This is following the typical pattern of an initial quake followed by a series of aftershooks of decreasing intensity and increasing (average) separation in time.

[notpoliticallycorewrecked]

Did anyone remember that this is the anniversary for the Colinga quake in 83 or 84. Wow, six in about an hour that is a lot.

Nothing in Fresno. We felt the Northridge quake series all the way up here. It rippled up the backbone of the Sierras. It shook here so hard that it woke us up.

[RedBloodedAmerican]

No, it is just Satan under the ground moving around getting ready for his buddy Bill Clinton's arrival in Cali later this week. Thats all.