earthquake.jpgNo, that wasn’t the drill, that was indeed an earthquake.

At publication time, the USGS says that the magnitude was a 4.2 for the quakethen downgraded it to a 3.9, then upgraded it to a 4.0 as of 4:12 this afternoon — that happened at 2:41 PT this afternoon. They report that its epicenter was 2 miles East-Southeast of Berkeley.

According to the USGS, the event was located on the Hayward Fault, and had a depth of about 6 miles.

As of 2:50 PM, BART says they are delayed as train operators conduct post-quake track inspections. They did not have an estimate for when the trains will resume normal operations.

In the Outer Sunset, it felt like two jolts, with a quiver in between. None of the three animals (two dogs and a cat) in my apartment noticed a damn thing.

“A few things actually fell off shelves here. No damage though,” reports John, an Appeal reader in Berkeley. So far, say officials, no damage or injuries have been reported.

According to Keith Knudsen, deputy director of the USGS Earthquake Science Center in Menlo Park, the quake was of the typical “strike-slip” variety, in which two sides of the fault slide horizontally.

Knudsen said the USGS had not yet recorded any aftershocks, and that there is a roughly 5 percent chance that this afternoon’s quake could be a foreshock to a larger seismic event.

What did it feel like for you? Tell the USGS, then tell us.

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the author

Eve Batey is the editor and publisher of the San Francisco Appeal. She used to be the San Francisco Chronicle's Deputy Managing Editor for Online, and started at the Chronicle as their blogging and interactive editor. Before that, she was a co-founding writer and the lead editor of SFist. She's been in the city since 1997, presently living in the Outer Sunset with her husband, cat, and dog. You can reach Eve at eve@sfappeal.com.

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  • lukebot

    We felt it here on the third floor of the San Jose Mercury News. Kind of a rolling motion, maybe a second long. At first, we thought a truck had hit the building.

  • lukebot

    We felt it here on the third floor of the San Jose Mercury News. Kind of a rolling motion, maybe a second long. At first, we thought a truck had hit the building.

  • Pumpkin Pie

    Animals didn’t forewarn? So, the theory on animal insights does not apply to all….

  • Pumpkin Pie

    Animals didn’t forewarn? So, the theory on animal insights does not apply to all….

  • Jewli

    I am in the Inner Richmond, SF. I live on the 3rd floor of a 3-story apt building.
    It was strong and shook for 15 seconds. It rattled the windows.
    Kinda ironic that today was the Earthquake Drill
    I think USGS is incorrect on their 3.9 rating!

  • Jewli

    I am in the Inner Richmond, SF. I live on the 3rd floor of a 3-story apt building.
    It was strong and shook for 15 seconds. It rattled the windows.
    Kinda ironic that today was the Earthquake Drill
    I think USGS is incorrect on their 3.9 rating!

  • Eve Batey

    None of my pets ever have! Maybe they are just lazy jerks?

    But this was the most striking example of their lack-of-reactivity, because it was LOUD and felt like the building went over a speed bump. But no one even stopped snoring.

  • Eve Batey

    None of my pets ever have! Maybe they are just lazy jerks?

    But this was the most striking example of their lack-of-reactivity, because it was LOUD and felt like the building went over a speed bump. But no one even stopped snoring.

  • Jewli

    Yea, my cat just looked up at me while I crouched in the doorway

  • Jewli

    Yea, my cat just looked up at me while I crouched in the doorway

  • Jewli

    darn cats!

  • Jewli

    darn cats!

  • Becca Klarin

    Here in SOMA, on the 5th floor of a 6th floor 1980s building, we all felt it. It was such a shock that people ran to their doorways.

  • Becca Klarin

    Here in SOMA, on the 5th floor of a 6th floor 1980s building, we all felt it. It was such a shock that people ran to their doorways.

  • DT

    It was more up & down than rolling and definitely not like the thumps we have been getting from out by the Zoo. Since our house (in the Richmond) didn’t move sideways I thought it was out by there on the San Andreas. My guess after the second jostle was a 3.8.

  • DT

    It was more up & down than rolling and definitely not like the thumps we have been getting from out by the Zoo. Since our house (in the Richmond) didn’t move sideways I thought it was out by there on the San Andreas. My guess after the second jostle was a 3.8.

  • Rick

    Also in SOMA – 2nd floor of a 5-floor building near Mission & New Montgomery.

    Biggest takeways were “wow, this is an jumper, not a roller” and the creaking sounds from our unreinforced masonry building’s structure.

  • Rick

    Also in SOMA – 2nd floor of a 5-floor building near Mission & New Montgomery.

    Biggest takeways were “wow, this is an jumper, not a roller” and the creaking sounds from our unreinforced masonry building’s structure.