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  • hstenner
    2013 Golden Guardian Exercise is "on" - please participate!   1 year 10 weeks ago

    Please upload again?

    "Clearinghouse Golden Guardian exercise summary and timeline.pdf" link not working.

  • hudnut
    2013 Golden Guardian Exercise is "on" - please participate!   1 year 10 weeks ago

    The 2013 Golden Guardian Exercise is underway. The California Earthquake Clearinghouse has established a virtual earthquake clearinghouse at: http://www.californiaeqclearinghouse.org/2013-golden-guardian-exercise.

    On this site you can view the SpotOnResponse Map, find out the physical location(s) of the Clearinghouse, and learn how to submit important observations. Please explore this site and SpotOnResponse. On Wednesday, May 15, you are invited to actively participate in the exercise and we hope you join the live webinar from 10 am - 1 pm to follow the action. More information about the webinar is available on the virtual clearinghouse site.

    For More Information (note new URL) : http://www.californiaeqclearinghouse.org/2013-golden-guardian-exercise-3/

    Point of Contact:
    ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    Anne Rosinski  PG 7481, CEG 2353
    Senior Engineering Geologist
    California Geological Survey
    345 Middlefield Road, MS 520
    Menlo Park, CA 94025
    650.688.6373 Fax: 650.688.6329
    Anne.Rosinski@conservation.ca.gov
    http://www.conservation.ca.gov/cgs
    ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

    - - -

    NOTE FROM ANNE:

    You do not have to be in northern California to participate in the exercise next week.  Check the  Clearinghouse website starting Monday May 13 for additional updates.
     
    CALIFORNIA EARTHQUAKE CLEARINGHOUSE
    GOLDEN GUARDIAN EXERCISE
    Wednesday, May 15th
    10:00 am – 1:00 pm PDT

    Dear California Earthquake Clearinghouse member,
     
    The California Earthquake Clearinghouse will be participating in the 2013 Cal EMA Golden Guardian Exercise. The purpose of the Clearinghouse exercise is to introduce everyone to the concept of expanded  operations possible through the addition of the virtual Clearinghouse we’re developing using the Unified Incident Command and Decision Support (UICDS) middleware. This year's scenario is a catastrophic San Francisco Bay Area earthquake. The exercise will take place over three days and updates will be posted to the California Earthquake Clearinghouse website throughout the exercise. On May 15, Clearinghouse members will have the opportunity to use data collection tools to share information with the Clearinghouse which will then be displayed on the Clearinghouse website. We will also host a webex running concurrent with the exercise where you can tune in to hear the action narrated live, ask questions and hear from the various Clearinghouse partners (CGS, Cal EMA, USGS, NASA, EERI, Berkeley Seismological Lab, SpotOnResponse) developing the tools you’ll be using. 
     
    This is the third of six planned Clearinghouse exercises.  Over the last year we’ve listened to the feedback you’ve provided and continue to refine the SpotOnResponse mobile app being developed for us and we are eager to share with you the latest improvements. We would like to invite you to attend a one-hour training session that will introduce you to the updated SpotOnResponse as well as tell you more about how you can participate in the Clearinghouses activities for Golden Guardian.  The last training opportunity is May 14, 2:00 PDT.  See attachment for details.
     
    Please see the attachment for a summary of the exercise and how to participate.
     
     
    Anne
    Chair, California Earthquake Clearinghouse

  • hudnut
    2012.05.30-Golden Guardian Exercise   1 year 10 weeks ago

    The 2013 Golden Guardian Exercise is underway. The California Earthquake Clearinghouse has established a virtual earthquake clearinghouse at: http://www.californiaeqclearinghouse.org/2013-golden-guardian-exercise.

    On this site you can view the SpotOnResponse Map, find out the physical location(s) of the Clearinghouse, and learn how to submit important observations. Please explore this site and SpotOnResponse. On Wednesday, May 15, you are invited to actively participate in the exercise and we hope you join the live webinar from 10 am - 1 pm to follow the action. More information about the webinar is available on the virtual clearinghouse site.

    For More Information (note new URL) : http://www.californiaeqclearinghouse.org/2013-golden-guardian-exercise-3/

    Point of Contact:
    ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    Anne Rosinski  PG 7481, CEG 2353
    Senior Engineering Geologist
    California Geological Survey
    345 Middlefield Road, MS 520
    Menlo Park, CA 94025
    650.688.6373 Fax: 650.688.6329
    Anne.Rosinski@conservation.ca.gov
    http://www.conservation.ca.gov/cgs
    ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

    - - -

    NOTE FROM ANNE:

    You do not have to be in northern California to participate in the exercise next week.  Check the  Clearinghouse website starting Monday May 13 for additional updates.
     
    CALIFORNIA EARTHQUAKE CLEARINGHOUSE
    GOLDEN GUARDIAN EXERCISE
    Wednesday, May 15th
    10:00 am – 1:00 pm PDT

    Dear California Earthquake Clearinghouse member,
     
    The California Earthquake Clearinghouse will be participating in the 2013 Cal EMA Golden Guardian Exercise. The purpose of the Clearinghouse exercise is to introduce everyone to the concept of expanded  operations possible through the addition of the virtual Clearinghouse we’re developing using the Unified Incident Command and Decision Support (UICDS) middleware. This year's scenario is a catastrophic San Francisco Bay Area earthquake. The exercise will take place over three days and updates will be posted to the California Earthquake Clearinghouse website throughout the exercise. On May 15, Clearinghouse members will have the opportunity to use data collection tools to share information with the Clearinghouse which will then be displayed on the Clearinghouse website. We will also host a webex running concurrent with the exercise where you can tune in to hear the action narrated live, ask questions and hear from the various Clearinghouse partners (CGS, Cal EMA, USGS, NASA, EERI, Berkeley Seismological Lab, SpotOnResponse) developing the tools you’ll be using. 
     
    This is the third of six planned Clearinghouse exercises.  Over the last year we’ve listened to the feedback you’ve provided and continue to refine the SpotOnResponse mobile app being developed for us and we are eager to share with you the latest improvements. We would like to invite you to attend a one-hour training session that will introduce you to the updated SpotOnResponse as well as tell you more about how you can participate in the Clearinghouses activities for Golden Guardian.  The last training opportunity is May 14, 2:00 PDT.  See attachment for details.
     
    Please see the attachment for a summary of the exercise and how to participate.
     
     
    Anne
    Chair, California Earthquake Clearinghouse
     

  • Treiman
    2012.08.26 - Swarm near Brawley, California   1 year 43 weeks ago

    Follow up report from Ken Hudnut, Jerry Treiman, Eric Fielding, and John Galetzka
    (USGS, CGS, JPL/Caltech & Caltech, respectively)

    Subsequent to Ken's initial field survey Eric Fielding derived an interferogram from TerraSAR-X data spanning the period from 9 August to 31 August, 2012. Based on this data we (KH, JT, EF & JG) identified several potential locations of surface displacement in the vicinity of the Brawley swarm and conducted a focused field investigation of at least a dozen of these lineaments on 10 September 2012 to look for surface rupture.  We found surface rupture in one field along the southwest tail of the swarm and indications of triggered slip on the northernmost portion of the Imperial Fault. (see attached document)

  • walls
    2012.08.26 - Swarm near Brawley, California   1 year 46 weeks ago

    Aug. 26th (JD 239) 5Hz data from the following stations: P494, P495, P496, P497, P498, P499, P501, P502, P503, P506, P507, P508, P509, P510, P744 with remote stations P449 and P779
    are available at
    ftp://data-out.unavco.org/pub/highrate/rinex/2012/239/

    Thanks to Yehuda B. for the request.

  • fielding
    2012.08.26 - Swarm near Brawley, California   1 year 47 weeks ago

    The NASA-JPL airborne InSAR system UAVSAR has been covering the Salton Trough since 2009. The most recent flights were in May 2012. The next flight over the area has been pulled forward from the scheduled flights in November to September 25. Unfortunately, the NASA Gulfstream III that carries UAVSAR is in maintenance now and will be doing another mission after that so September 25 is the earliest flight for UAVSAR.

    Data from previous UAVSAR flights is available from http://uavsar.jpl.nasa.gov and from the Alaska Satellite Facility at https://vertex.daac.asf.alaska.edu/ 

  • hudnut
    2012.08.26 - Swarm near Brawley, California   1 year 47 weeks ago

    Updated figures that now include updated SCSN seismicity and mapped traces of the Imperial and Brawley faults (from Qfaults), as well as GPS tracks from the field recon.

    Additionally, last night I checked at Salt Creek and today I checked several other locations along the southern San Andreas in the Coachella Valley and did not find any new cracking or any other evidence of triggered creep (Thousand Palms Canyon and near Devers Hill).

  • walls
    2012.08.26 - Swarm near Brawley, California   1 year 47 weeks ago
  • walls
    2012.08.26 - Swarm near Brawley, California   1 year 47 weeks ago

    If anyone is interested in a custom dataset (1Hz or 5Hz) from PBO stations in the area please submit a request to: http://pbosoftware.unavco.org/shared/scripts/datarequests/
    Regards,
    Chris - 303-775-2159

  • angelyn
    2012.08.26 - Swarm near Brawley, California   1 year 47 weeks ago

    We've revised our solutions in ftp://sideshow.jpl.nasa.gov/pub/JPL_GPS_Timeseries/BrawleySwarm after improving the analysis strategy (specifically, fixing troposphere to that estimated in static positioning run, rather than estimating both trop and position together in the kinematic run).

    Importantly, station P498 is not moving in the East direction.  There is discernable motion in (at least) stations P502, P499, and P495.

    Angelyn Moore and Susan Owen, ARIA team

  • fielding
    2012.08.26 - Swarm near Brawley, California   1 year 47 weeks ago

    WInSAR has requested tasking of acquisitions on the next two passes of TerraSAR-X (TSX) over the Brawley area, on August 31st (ascending orbit 15) and September 3rd (descending orbit 68). TSX data was last acquired on these two tracks over the Brawley area on August 20th (orbit 15) and August 12th (orbit 68).

  • hudnut
    2012.08.26 - Swarm near Brawley, California   1 year 47 weeks ago

    Here is a bit more of an update than posted before:

    I checked throughout the epicentral area without finding any evidence of surface rupture. I did visit and speak with people at the geothermal plant near the intersection of Andre and Hovley, called Ormat, and later spoke with people from their main Reno office. I also met the Mayor and City Manager of Brawley and spoke with their engineers, and also talked with several people from Imperial Irrigation District. All of these people had been getting reports from their field personnel and all tried help lead me to anything that might be of interest, but after following all of their helpful leads I still struck out.

    I also checked but did not find any fresh evidence of creep on the Imperial, Brawley, Superstition Hills and San Andreas faults. I did not find anything today that looked like fresh cracking, certainly nothing tectonic. I did not find any evidence of liquefaction, and only minor cracking associated with slumping along irrigation water systems.

    I haven't yet downloaded photos and type in my notes. Please let me know if you would like more details, e.g., the GPS track file or photos, etc.

    Regards,

        Ken

      hudnut@usgs.gov

      cell:  626-672-6295 (text or call)

    P.S. - Attached are maps at two resolutions showing my GPS track from today.

  • hudnut
    2012.08.26 - Swarm near Brawley, California   1 year 47 weeks ago

     Today I field-checked the epicentral area and interviewed many people in the field. None of the cracking I saw appeared to be tectonic.

    I found no new evidence of creep on any of these faults; Imperial, Brawley, Superstition Hills, San Andreas.

    More details to follow later.

  • mwei
    2012.08.26 - Swarm near Brawley, California   1 year 47 weeks ago

    here is the P498 solution for August 26.

  • angelyn
    2012.08.26 - Swarm near Brawley, California   1 year 47 weeks ago

    The ARIA team at JPL has placed 30-second GPS solutions in
    ftp://sideshow.jpl.nasa.gov/pub/JPL_GPS_Timeseries/BrawleySwarm

    A README.txt file is available with details on the provided solutions. We note velocity changes beginning at the time of the swarm, particularly in the east component of station P498.

    Angelyn Moore and Susan Owen, ARIA team

  • hudnut
    2012.08.26 - Swarm near Brawley, California   1 year 47 weeks ago

    Update:  Brian Berard of CalEnergy has replied that he and all others will perform evaluations of all their facilities and report back to us if anybody gets any info on surface faulting, liquefaction, ground deformation, etc. so hopefully we'll have more info from them by tomorrow afternoon or so.

  • hudnut
    2012.08.26 - Swarm near Brawley, California   1 year 47 weeks ago

    Hi Joann, thank you for these contacts. I was planning to give Brian Berard a call tomorrow morning before determining further plans for field recon to see if there may be surface faulting. He is the person who alerted us about the surface faulting back in the 2005 activity, so I feel that he will almost surely be the right person for me to speak with. Earlier messages here mentioned potential for a lawsuit, and the 2005 situation did involve one, but I have not heard the outcome of it. Whomever is involved with surface faulting recon will likely call down this list of contacts and also check in with local government agencies and others in the vicinity to see whether any reports have come in from road crews, etc. I'd be glad to try to relay info, and please anyone who gets new info on faulting or liquefaction, etc., please do feel free to reply here or by e-mail. Also, I hope that if others have potentially useful contact info they may provide it as replies here, too. Thank you. - Ken (cell: 626-672-6295)

  • hudnut
    2012.08.26 - Swarm near Brawley, California   1 year 47 weeks ago

    Attached is a KML file with the mud pots and also the volcanic and geothermal features, etc. from Lynch et al., BSSA 2008.

     

    Lynch, D.K. and K.W. Hudnut, The Wister Mud Pot Lineament: Southeastward Extension or Abandoned Strand of the San Andreas Fault?, BSSA, Vol. 98, No. 4, pp. 1720–1729, August 2008, doi: 10.1785/0120070252

  • hudnut
    2012.08.26 - Swarm near Brawley, California   1 year 47 weeks ago

    Recon for surface rupture probably will be checked tomorrow (Monday) by USGS'ers, but e-mail is circulating tonight and I expect plans will be discussed in the morning. Thanks, Jeff.

  • djackson
    2012.08.26 - Swarm near Brawley, California   1 year 47 weeks ago

    The document "BSZ_sequence..." is a very useful summary of the history. But the last paragraph contains the most intriguing words:

    "but bigger events are possible on the major northwest striking late Quaternary faults in this vicinity. "

    Anyone care to be more explicit?

    Dave Jackson

  • gareth
    2012.08.26 - Swarm near Brawley, California   1 year 47 weeks ago

    I plotted this seismicity map using SCSN locations color-coded by year. It picks out the different swarms pretty well. It is approximately centered on the current swarm.

  • hauksson
    2012.08.26 - Swarm near Brawley, California   1 year 47 weeks ago

    Updated talking points

  • baagaard
    2012.08.26 - Swarm near Brawley, California   1 year 47 weeks ago

     

  • baagaard
    2012.08.26 - Swarm near Brawley, California   1 year 47 weeks ago

     

  • huynht
    2012.08.26 - Swarm near Brawley, California   1 year 47 weeks ago

     Circulated by Egill Hauksson (Caltech).