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Posted by: thepinetree on 01/04/2018 07:46 AM Updated by: thepinetree on 01/04/2018 07:46 AM
Expires: 01/01/2023 12:00 AM
:

No Damage Reported After Magnitude 4.5 Earthquake Wakes Bay Area

Berkeley, CA...The U.S. Geological Survey said the 4.5 temblor along the Hayward Fault rattled the Bay Area Awake but apparently has done little damage other than knocking items off of shelves. A bit more about the Hayward Fault from the USGS is below.





The Hayward Fault is a mostly right-lateral, strike-slip fault with approximately 5 mm/yr (1/5 inch/year) of creep. The 2003 Working Group for California Earthquake Probability, in agreement with previous working groups going back to 1990, assigned a slip rate on the Hayward Fault to be about 9 mm/yr (1/3 inch/year). This implies that approximately 4 mm/yr of motion is taken up in a stick-slip fashion, leading to the generation of earthquakes.

The Hayward Fault runs from San Pablo Bay in the north to Fremont in the south, passing through the cities of Berkeley, Oakland, Hayward, and Fremont. South of Fremont the fault branches into a complex set of surface faults that connect the Hayward Fault to the central part of the Calaveras Fault. The Hayward and Calaveras Faults may have a simpler connection at depths more than 5 km (3 miles), joining in the subsurface just south of the Calaveras Reservoir (site of the October 30, 2007 M5.4 Alum Rock earthquake). The Hayward Fault may be segmented into a northern and southern segment in the vicinity of Berkeley or Oakland.

The most recent major earthquake on the Hayward Fault occurred at 7:53 AM on 21 October 1868 with an estimated magnitude of ??. With an epicenter in the heart of the Bay Area, then having the largest population on the west coast with a total of 260,000 residents, this earthquake was one of the most destructive in California history, and remains the nation's 12th most lethal earthquake. Property loss was extensive and 30 people were killed. Five deaths were reported in San Francisco, out of a population of 150,000, where the total property loss was estimated to be $350,000 (in 1868 dollars). This earthquake was known as the "great San Francisco earthquake" until the magnitude 7.9 shock on the San Andreas Fault on 18 April 1906.

Geologic studies at Tule Pond (Fremont) on the southern segment of the Hayward Fault have shown that the average interval between the past 5 earthquakes has been 140 ± 50 years. The average interval of the past 11 earthquakes on this segment of the fault is 170 ± 80 years.

The 2003 Working Group for California Earthquake Probability assigned a 27% probability that the Hayward-Rodgers Creek Fault system would produce a magnitude 6.7 or larger earthquake in the next 30 years.


Comments - Make a comment
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No Subject
Posted on: 2018-01-04 07:54:13   By: Anonymous
 
This was a man made earthquake from people laughing. When they heard Merita was running for BOS!

[Reply ]

    Re:
    Posted on: 2018-01-04 08:59:05   By: Anonymous
     
    What a nasty human being you must be. You're material isn't funny either - as if anyone in the greater Berkeley area knows anything about Calaveras politics.

    [Reply ]

      Re:
      Posted on: 2018-01-04 09:44:53   By: Anonymous
       
      there has been a strong Berkeley contingent in the area above Angels camp along hw4 for years. They know and are involved in more local politics than you are aware of.


      [Reply ]

        Re:
        Posted on: 2018-01-04 09:54:32   By: Anonymous
         
        2 post go hug a Eucalyptus Tree !

        [Reply ]

          Re:
          Posted on: 2018-01-04 10:48:18   By: Anonymous
           
          The Russians are involved .

          [Reply ]

            Re:
            Posted on: 2018-01-04 13:37:40   By: Anonymous
             
            make lite of it folks BUT when the Hayward Fault shows it's intensity it will be a wake up call.

            [Reply ]

              Re:
              Posted on: 2018-01-04 14:34:33   By: Anonymous
               
              won't be much compared to the rocket man's icbm dead center over treasure island.

              [Reply ]

                Re:
                Posted on: 2018-01-04 15:18:34   By: Anonymous
                 
                Let her shake

                [Reply ]

                  Re:
                  Posted on: 2018-01-07 14:31:54   By: Anonymous
                   


                  [Reply ]

            Re:
            Posted on: 2018-01-04 17:25:36   By: Anonymous
             
            Lock him up!

            [Reply ]

    Re:
    Posted on: 2018-01-04 13:52:51   By: Anonymous
     
    big foot farted after eating at the nasty taco truck up on hwy 4 below arnold then blew out the bottom of a state park bathroom.

    [Reply ]

      Re:
      Posted on: 2018-01-04 14:38:42   By: Anonymous
       
      global warming.

      [Reply ]

        Re:
        Posted on: 2018-01-04 15:23:47   By: Anonymous
         
        That's shi+ she makes on that taco truck. Go to AC by Middleton's great food and you don't barking after eating a taco.

        [Reply ]

          Re:
          Posted on: 2018-01-04 15:30:03   By: Anonymous
           
          I love to bark

          [Reply ]

            Re:
            Posted on: 2018-01-04 16:39:20   By: Anonymous
             
            While your being spanked ?

            [Reply ]


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