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Virginia Earthquake of 2011, Aug 23

  1. Aug 23, 2011 #1

    Hurkyl

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    5.8 in Virginia

    http://www.google.com/search?client...rceid=opera&ie=utf-8&oe=utf-8&channel=suggest

    According to Wikipedia, this is the strongest earthquake since a similarly sized one in 1897.


    http://earthquake.usgs.gov/earthquakes/recenteqsus/Quakes/usc0005ild.php#details [Broken]. (Courtesy of Astronuc)

    (note: official reports of the strength have varied, started at 5.8, went up to 5.9, and I think reports are back down to 5.8)
     
    Last edited by a moderator: May 5, 2017
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  3. Aug 23, 2011 #2

    G01

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    Re: Recent Virginia Earthquale

    Felt it in Boston...
     
  4. Aug 23, 2011 #3

    turbo

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    Re: Recent Virginia Earthquale

    A bit of surprise, since the Appalachian chain is not terribly active.

    Maine has a few small ones here and there, and the most recent "swarm" has been attributed to tectonic rebound from deformation by the Laurentide ice sheet that scoured our landscape during the last ice age.

    Thanks for the heads-up. I'll be watching the news tonight to get updates.
     
  5. Aug 23, 2011 #4

    Hurkyl

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    Re: Recent Virginia Earthquale

    I was relatively close to last years 3.6 quake -- I'm not entirely sure how this one compared in my area. I think a little less violent, but more prolonged. (and I didn't discover google's "recent earthquakes" display at that time) (also, I'm half asleep for today's)
     
  6. Aug 23, 2011 #5

    lisab

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    Re: Recent Virginia Earthquale

    Not unexpectedly, USGS sites are jammed.
     
  7. Aug 23, 2011 #6

    russ_watters

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    Re: Recent Virginia Earthquale

    Felt it outside of Philly - my first. Didn't realize what it was at first.

    Http://www.usgs.gov

    Felt like 15 sec of 1 inch, side to side oscillations at around 80hz
     
  8. Aug 23, 2011 #7

    Doc Al

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    Re: Recent Virginia Earthquale

    Felt it in my office in NJ! Had to evacuate. (Now I've got to check the lab. Don't think it did any damage.)
     
  9. Aug 23, 2011 #8

    turbo

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    Wow! People felt it that far away! I wouldn't have noticed a small one, even if it could be felt here. Heavy trucks rumbling down this back road cause enough light shaking that a small quake would go unnoticed.
     
  10. Aug 23, 2011 #9
    I felt in Ontario. It was so weak that I couldn't tell if my bed is really moving back and forth or I am just feeling it.
     
  11. Aug 23, 2011 #10

    G01

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    Re: Recent Virginia Earthquale

    Yeah my first as well. I actually thought I was getting sick because I felt dizzy for apparently no reason. Then I realized my desk was slightly shaking.
     
  12. Aug 23, 2011 #11
    Felt in the Jersey suburbs of Phila. I lived in Japan, so I'm used to it. This is not the first one that I felt in NJ, there was one around 1971.
     
  13. Aug 23, 2011 #12

    Astronuc

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    Apparently folks in the Hudson Valley felt it. I did hear a kind of a muffled boom (P-wave probably), but no lateral motion.

    This is the event - http://earthquake.usgs.gov/earthquakes/recenteqsus/Quakes/usc0005ild.php [Broken]

    5.9 mag, near surface (< 1 mile), but poorly constrained.
     
    Last edited by a moderator: May 5, 2017
  14. Aug 23, 2011 #13
    Yea felt it in NYC as well. Didn't realize what happened until I saw the aquarium water sloshing around.
     
  15. Aug 23, 2011 #14

    turbo

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    I wouldn't have noticed a "boom" either, since we are under the flight-path for military aircraft headed for Europe and the ME. When there are large troop-movements and/or lots of equipment being deployed in a hurry, there is a lot of rumbling overhead. Commercial aircraft are pretty quiet - military aircraft? Not so much.

    When I was a kid, sonic booms were quite commonplace here. SAC had lots of fighters to escort their jet bombers, and their old re-built tankers (generally B-28s) and when those fighters had tanked up, they'd often put on a show for us kids getting back to escorting the bombers. Boom! Life anywhere near the old Dow AFB meant that your skies were constantly streaked with contrails.
     
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  16. Aug 23, 2011 #15

    lisab

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    That link puts the depth at 1 km, +/- 7.4 km...:biggrin:
     
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  17. Aug 23, 2011 #16

    jtbell

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    Didn't feel anything here in upstate South Carolina. I was in lab with students sitting quietly taking a quiz. Someone would have spoken up if they had felt something.

    I see a report on cnn.com that someone in Raleigh NC felt a "small tremor." It must have petered out before it got here.
     
  18. Aug 23, 2011 #17
    We felt it hard here in Southern Virginia. I had a split second of vertigo before I felt the shaking.

    Preliminary reports are there is no damage here at NASA - still waiting to hear from JLab.

    News says there were shattered windows at UVA.

    Only issues I have heard about are friends in Northern Virginia having issues with cell service.
     
  19. Aug 23, 2011 #18

    Hurkyl

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    Odd, the USGS has another report apparently for the same quake, but with different data

    http://earthquake.usgs.gov/earthquakes/recenteqsww/Quakes/se082311a.html [Broken]
    http://earthquake.usgs.gov/earthquakes/eqinthenews/2011/usc0005ild/ [Broken]
     
    Last edited by a moderator: May 5, 2017
  20. Aug 23, 2011 #19

    Evo

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    It seems the discrepancy is the source reporting the event.

    For the geeks that just have to know the history of earthquakes in Virginia.

    http://www.virginiaplaces.org/geology/quake.html

     
    Last edited by a moderator: May 5, 2017
  21. Aug 23, 2011 #20

    dlgoff

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    Not meaning to hijack from Virginia but there was a http://www.nytimes.com/2011/08/24/us/24earthquake.html" [Broken] last night.
     
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