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  • shaw
    2010.04.04 - El Mayor - Cucapah Earthquake   12 years 25 weeks ago

    If it could be arranged with mexican authorities, now, asap, would be a really good time

    to LIDAR the break and the adjacent areas around the break.

    One might catch some afterslip;  or, on the slight chance there were another sizable one nearby,

    a B4/B5 scenario.   

  • oskin
    2010.04.04 - El Mayor - Cucapah Earthquake   12 years 25 weeks ago

    I just received the following message from John Fletcher. I will reply with what I have learned thus far from this web site about various response plans. John's email address is jfletche@cicese.mx

    "The phone lines are busy, but everything is fine here at my end of Ensenada. We did feel shaking for about a minute, but not very intense - lamps were swinging but books etc stayed on the shelves. I am planning to
    visit the rupture with Ronald Spelz and some other students. I will also be talking with those involved in our group proposal to deploy the GPS and seismometers that we have available. I am definitely interested in
    coordinating work with you and SCEC.  My home phone is 646-174-6801.

    Saludos,  John"

  • cochran
    2010.04.04 - El Mayor - Cucapah Earthquake   12 years 25 weeks ago

    I have contacted IRIS and will give an update of any instruments they have available as soon as I hear from them. I have a feeling that most/all of the PASSCAL RAMP instruments are in Chile right now.

  • jrmurray
    2010.04.04 - El Mayor - Cucapah Earthquake   12 years 25 weeks ago

     

    USGS has surveyed campaign GPS sites in the northern <?xml:namespace prefix = st1 />Salton Sea area in past years (see Google Earth map linked here: http://quake.wr.usgs.gov/research/deformation/gps/).  Depending on need I could send 1 or two experienced field crew to reoccupy these sites or others.  Judging from Rowena’s displacements, focusing efforts farther south might be more fruitful.

  • rolohman
    2010.04.04 - El Mayor - Cucapah Earthquake   12 years 25 weeks ago

    The next Envisat acquisitions in the usual imaging mode are May 2nd and April 13th and are all in "planned" status by ESA, so we should have plenty of time to make sure that they are acquired.  Whether they will acquire other swaths that could be used for postseismic work is something we need to check.

     

  • steidl
    2010.04.04 - El Mayor - Cucapah Earthquake   12 years 25 weeks ago

    There are customs and of course security issues with going south of the border. I'd suggest leaving south of the border to an IRIS response if there is going to be one, as they are used to dealing with Customs issues. As far as security, basically any stations would have to have 24/7 babysitters as they are talking about with the deployment of temporary continuous GPS stations.

    Anything north of the border is a possibility with SCEC instruments. We should have at least 10 of the older six-channel 72A style RefTek instruments with FBA-23 and L4 sensors, and two newer 6-channel Q330 stations with Marmots that could be configured for real-time if cell service is available. We have Episensors and L4's that we would use for the Q330's.

    I'm teaching Tuesday/Thursday this quarter, so it will be harder for me to spend more than a day in the field at a time, and my project engineer left Friday for Ireland, so I'm short staffed in my lab right now. I've got a lab assistant that could get instruments out there, but we would need some more experienced hands to assist.
     

  • ybock
    2010.04.04 - El Mayor - Cucapah Earthquake   12 years 25 weeks ago

    We have collected all the real-time 1 Hz solutions from the California Real Time Network (CRTN) CGPS stations and will upload them to the GPS Explorer data portal (http://geoapp03.ucsd.edu/gridsphere/gridsphere). The 1 Hz RINEX data will be downloaded to the SOPAC archive at http://garner.ucsd.edu/pub/highrate/cache/rinex/2010/094/

  • beroza
    2010.04.04 - El Mayor - Cucapah Earthquake   12 years 25 weeks ago

    Jamie, how many of these are available? 

  • beroza
    2010.04.04 - El Mayor - Cucapah Earthquake   12 years 25 weeks ago

    No response from any seismologists down there yet, but Joann Stock has a good contact (former postdoc, I think) at UABC in Mexicali.  As for network design, I'm not sure what to suggest with only 5 stations until we know a little more about the event.  Elizabeth, perhaps it's time to at least put IRIS/PASSCAL on alert that we may be requesting their RAMP instruments.

  • huynht
    2010.04.04 - El Mayor - Cucapah Earthquake   12 years 25 weeks ago

    Fixed - you should be able to upload kml, kmz files now. Screen capture of your file attached.

  • rolohman
    2010.04.04 - El Mayor - Cucapah Earthquake   12 years 25 weeks ago

    Assuming a 100bar stress drop, this figure shows the horizontal displacements (absolute value) expected for a rupture extending down to 10km (i.e., about 106 km rupture).  This is based on the USGS moment tensor solution.

    Note - we still can't upload .kml or .kmz files, so I've added a dummy "_.txt" suffix to the file name.

  • bowman
    2010.04.04 - El Mayor - Cucapah Earthquake   12 years 25 weeks ago

    Let us know what you need.  I have several capable field vehicles and can probably rustle up students to help.  They won't have the technical expertise but can help with driving, grunt work, and babysitting.

  • cochran
    2010.04.04 - El Mayor - Cucapah Earthquake   12 years 25 weeks ago

    We have 5 seismometers (6 channel RefTek with EpiSensors and L4 sensors) at UC Riverside that could be deployed around Laguna Salada fault. We would likely need contacts in Mexico to find appropriate sites that are secure. I am not sure if SCEC RAMP has an additional instruments that could go out as well? Let me know if you are interested in helping out or have any ideas for science targets/array design.

  • fialko
    2010.04.04 - El Mayor - Cucapah Earthquake   12 years 25 weeks ago

     Mike - we are contacting people on the mexican side. The GPS campaign can be conducted pretty autonomously. 

  • fialko
    2010.04.04 - El Mayor - Cucapah Earthquake   12 years 25 weeks ago

     We will have 5-6 GPS sets and a crew of 5-6 people (possibly more - a number of students haven't responded yet). 

    We will be leaving at 7:30 am tomorrow (4/5) from SIO. We plan to set at least one "continuous" station in the epicentral area to capture early time-dependent deformation. This station will need "babysitters" for the next several days. 

  • oskin
    2010.04.04 - El Mayor - Cucapah Earthquake   12 years 25 weeks ago

     

  • fialko
    2010.04.04 - El Mayor - Cucapah Earthquake   12 years 25 weeks ago

     Greg - my understanding is that the Disaster Charter can be invoked by any affected country. In case of Haiti there was no action on the side of the haitian government, so the Charter was activated by the UN mission. 

    Brenda Jones at the USGS would be an appropriate person for initiating the request.  bkjones@usgs.gov

  • blume
    2010.04.04 - El Mayor - Cucapah Earthquake   12 years 25 weeks ago

    Yuri - What is the scale of the campaign you're trying to staff?  How many instruments over what time period? 

  • fialko
    2010.04.04 - El Mayor - Cucapah Earthquake   12 years 25 weeks ago

    We can use some helpers who know how to set up a GPS antenna. At the moment we have more instruments than people. 

  • hudnut
    2010.04.04 - El Mayor - Cucapah Earthquake   12 years 25 weeks ago

     

  • ganderso
    2010.04.04 - El Mayor - Cucapah Earthquake   12 years 25 weeks ago

     Mike - The International Charter on "Space and Major Disasters" is a protocol organized under the Group on Earth Observations that allows countries to request mobilization of "the space and associated ground resources (RADARSAT, ERS, ENVISAT, SPOT, IRS, SAC-C, NOAA satellites, LANDSAT, ALOS, DMC satellites and others) of the member agencies to obtain data and information on a disaster occurrence."  It was invoked following the Haiti and Chile events.  I believe -- and could be wrong -- that the country experiencing the disaster must make the formal request.  See http://www.geoportal.org/web/guest/geo_resources_details?p_p_id=vrdPortl...

     

  • jmcguire
    2010.04.04 - El Mayor - Cucapah Earthquake   12 years 25 weeks ago

     Looks like the same fault as the big swarm from last November 2 and 3?

      I think Tom Rockwell said he'd trenched this fault at somepoint?

     

  • oskin
    2010.04.04 - El Mayor - Cucapah Earthquake   12 years 25 weeks ago

    Are there plans yet for a field geology response from the USGS? We should try to coordinate one amongst the US and Mexican scientists. I have had no response from CICESE people yet. I don't think we can proceed with a field survey of the (likely) fault rupture without leadership from scientists in Mexico.

  • hudnut
    2010.04.04 - El Mayor - Cucapah Earthquake   12 years 25 weeks ago

     

  • dagnew
    2010.04.04 - El Mayor - Cucapah Earthquake   12 years 25 weeks ago

    Frank Wyatt reports that there are no obvious slow strain changes on the  Salton City or Durmid Hill strainmeters (especially interesting given that there appears to have been a 3.2 aftershock on the San Andreas). We will continue to keep an eye on these data.