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

    Number: 8816-414-81417

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

    Thanks for getting this out to the geologists! What is the number of the sat phone?

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

    Dave Bowman is en route to SCEC HQ to pick up satellite phone for Rockwell. He has been cleared to go into the field. Bowman will connect with Rockwell to handoff the sat phone.

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

    My understanding was that there can be issues with taking equipment across the border into mexico and more importantly getting them back out again. There was a message on this thread about broadband seismometers sitting in customs for 2 weeks waiting to get through. How is it that the GPS folks are getting continuous and campaign GPS equipment into mexico without these issues?

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

    We have a satellite phone available. Let us know if there's still a need, and how we may get it to Rockwell and/or others. I can be reached via cell phone 213-926-1641.

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

    John Fletcher would be a good person to coordinate on finding secure field locations for instruments. He knows the roads in the region from his fieldwork there. Also, much of that area is a wilderness so instruments should be fairly safe once in place. Right now what is key is getting a line of communication established with persons in the field. John is already there, and Tom Rockwell plans to leave soon. Neither has a sat phone right now.

    If there is a need for someone with spanish language skills to help with field deployment I could be available for a few days to help out in the field. I would need to fly out to meet you (Ontario?). Another logical person to help out here is Joann Stock.

  • cochran
    2010.04.04 - El Mayor - Cucapah Earthquake   12 years 26 weeks ago

    Currently, we have identified about 15 seismometers that can go out, including the 5 instruments that I have (and need to pull out of the ground today) and roughly 10 from the SCEC RAMP instrument pool. I sent an e-mail to IRIS PASSCAL requesting information about how many instruments are in their RAMP pool, but I have not heard anything back yet. Unfortunately, I believe that all of the RAMP instruments plus a large number out of the regular pool are currently in Chile. If you have any seismometers available and would like to help out please let me know.

    For any seismic deployment, I would like to coordinate with Mexican scientists as I am not familiar with the region and we would need to find secure sites (and my Spanish is poor). I am assuming that we would want the sites to be in the ground for at least several weeks, so it would be unfeasible to have a babysitter for each of the site for that period of time. If anyone from this group is familiar with the area or has ideas for secure sites, please let me know so we can better coordinate.

    I have e-mailed John Fletcher at CICESE (Ensenada) and Allen Husker (UNAM). I have not heard back from John, but Allen said he would call Carlos Valdez from the Mexican Seismic Network this morning. Allen has also offered to assist with getting permission and finding sites, but they would need to fly up from Mexico City. Greg also e-mailed Carlos, but I am not sure if he has received a reply yet.

    I think we have a number of volunteers lined up to help as soon as we hear back on these issues. 

  • oskin
    2010.04.04 - El Mayor - Cucapah Earthquake   12 years 26 weeks ago

    The status of things right now as far as I understand it is that there are three groups either a the site, en-route, or planning to soon depart. Fortunately, it includes groups led by the two individuals most familiar with the field geology of the area:

    (1) John Fletcher and others from CICESE went to the field last night and will be the first to find the rupture, most likely. John has done extensive work on the structural geology of the Laguna Salada.

    (2) Tom Rockwell is leading a group from SDSU. Tom has worked on 1892 Laguna Salada fault rupture and is also very familiar with other faults in the region.

    (3) A group led by SIO (Fialko / Sandwell) will be placing GPS instruments at sites near the epicenter and Cerro Prieto fault. Because our understanding of the rupture is now that it lies on a fault west of the CP fault (Laguna Salada fault or Cascabelle fault) it will be important to update this group on what is found on the geology side.

    Others that have expressed interest in joining field investigations are Kate Scharer and Ray Weldon. Ray is in the Coachella valley and could join the group easily. His cell phone number is listed in a message left on this discussion board last night. Kate is considering flying out from NC, which will take a day.

    James Dolan is committed to completeing a trench study on the China Lake naval base and cannot join the field response.

    I am at least 12 hours away from the rupture, by car. At this point I am unsure whether I will be able to go to the field, or whether that is the best use of my time right now. I am working on coordinating an NSF RAPID proposal to support a lidar survey of the rupture. Ramon Arrowsmith (currently on sabbatical leave in Germany) is working with me on this, and I would like to involve Ken closely in this as well.

    CRITICAL NEED: Get a satellite phone to Tom Rockwell ASAP. He is working on trying to figure this out but unfortunately does not have one handy at SDSU. Perhaps someone at SIO could pass one to him?

  • tjordan
    2010.04.04 - El Mayor - Cucapah Earthquake   12 years 26 weeks ago

    Greg and I are interested in understanding what plans for geology, seismology, and geodesy field work are shaping up in response to yesterday's event, and we'd like to make sure that the efforts are properly supported by the SCEC apparatus. Please let us know how your plans are shaping up. 

  • stock
    2010.04.04 - El Mayor - Cucapah Earthquake   12 years 26 weeks ago

    I talked to Octavio Lazaro-Mancilla of UABC Mexicali (engineering department)  by cell phone at 9:30 pm.  He had been in Mexico City the past 2 weeks and got back late on Sunday to Mexicali (after the earthquake).  He said the internet was not working in Mexicali.  He said people were sleeping outdoors because of fear of aftershocks.  He said the UABC was all closed due to Easter but he is going to talk to them in the morning and determine if the 3 Caltech broadband seismometers are there. (They were supposed to have cleared Mexican customs 2 weeks ago.) If so then we can coordinate about where to deploy them in the field.  I asked him to call me back in the morning to let me know what he needs.

  • hudnut
    2010.04.04 - El Mayor - Cucapah Earthquake   12 years 26 weeks ago

    NOTE: The USGS NEIC web page has been updated with an improved tectonic summary - please reload this URL:

      http://earthquake.usgs.gov/earthquakes/recenteqsus/Quakes/ci14607652.php...

    Subject: M 7.2 Baja event -- coordination and thanks!

    Here's a quick coordination and thank-you note, hopefully before people all head home for tonight.

    Sue Hough is serving as Duty Seismologist, and along with Kate, Egill, Nick, and Anthony let's hope they will be able to continue working on checking and timing and, as their fatigue may allow, will keep updating events through the night. We all owe them a debt of gratitude, once again. Nice work by the SCSN!

    It seems a high priority for SCSN to ensure that whatever events are happening to the north of the border are well checked over night (and for the next several days). If we can presume that the events north of the border are accurate, such as the M 4.1 near Westmoreland, then it's highly important that the group cc'd here should stay well informed over night. Specifically, anything above M>5 north of the border would presumably trigger a CEPEC meeting, so Kate Long and Jim Goltz need to be kept informed of course.

    I'm working with Sue Potter at NEIC to get one last text update posted onto the NEIC event summary web page for tonight. Sue is cc'd here and she is working the late shift tonight at NEIC. She can be reached on the NEIC hotline at (303)273-8680.

    This evening I've spoken twice at length with Javier Gonzalez of CICESE, and in e-mail correspondences earlier with Victor Wong, Raul Castro, John Fletcher, and Arturo Martin-Barajas, also all of CICESE.

    Javier just told me that on news footage he saw what looked like surface faulting on the highway between Mexicali and Tecate, on the main road that runs several km's south of the border and nearly parallel to it. He's not sure of the location, and it wasn't clear that it was surface faulting. John Fletcher of CICESE is heading to the field tonight, planning to identify and map surface faulting beginning tomorrow morning early.

    To my knowledge, USGS has not yet received a request for assistance so USGS cannot do any field deployments until such a request occurs. There may be ways to coordinate and/or assist (if requested) with seismic network issues or International Charter imagery, etc. remotely in the meantime.

    SCEC is using their event response page for coordination and I encourage everyone to use that method to keep in touch with SCEC colleagues for coordination on instrumentation, airborne imagery, etc. It's a good place to post updated figures showing seismicity, etc.

    I'll be in the office awhile longer tonight, and back in at 8:00 tomorrow.

    Thanks to all for helping in so many ways this evening.

    Regards,

        Ken

    - - -

    SCSN page:

        http://www.scsn.org/index.html

    USGS NEIC page:

        http://earthquake.usgs.gov/earthquakes/recenteqsus/Quakes/ci14607652.php

    CICESE Seismology page:

        http://sismologia.cicese.mx/

    SCEC Response Coordination page (requires registration and login account - point of contact is Tran Huynh at SCEC <huynht@usc.edu>):

        http://response.scec.org/node/273

    - - -
     

  • hudnut
    2010.04.04 - El Mayor - Cucapah Earthquake   12 years 26 weeks ago

    Subject: Surface faulting coordination -- Fwd: M 7.2 UPDATE

    I gather that Prof. John Fletcher of CICESE is en route to the field and will begin the search for surface faulting soon, along with Ronald Spelz and students from CICESE.

    Also, Tom Rockwell will be going tomorrow with a group of students and I believe they will try to meet up with John in the field somehow. I have e-mailed Tom's cell number to John. [also, just forwarded Ray Weldon's note to Tom and John]

    Also, Katherine Kendrick and Mike Rymer will be going down to check sites along the Mexico-USA border and to the north of the border for possible surface breaks and triggered slip.

    Javier Gonzalez told me that CICESE colleagues may be making arrangements for helicopter airborne recon tomorrow. There was not enough daylight today to get down there for air recon.

    Earlier today, I talked with Aspen Helicopters to begin to arrange for possible airborne reconnaissance as early as tomorrow. There are lots of things that would need to happen for this flight to occur. We need to have a request from colleagues in Mexico and then an official country clearance lined up for any USGS people who might go. Aspen is current and certified with AMD (formerly OAS). No other helo company in SoCal is AMD certified, to my knowledge. This is key for USGS but probably nobody else cares.

    USGS would certainly like to try to ensure good coordination with our partners. In this case, CICESE is our main partner, along with SCEC and CGS of course (unless CGS considers this outside their area of responsibility?). Katherine has been trying to reach Jerry Treiman.

    We hear that SCEC is coordinating a post-earthquake investigation, and we'll of course be coordinating with CICESE and SCEC across all areas, not only the surface faulting investigation.

    It sounds as if there will be interest in an NSF rapid award that might even support airborne LiDAR if possible - if so, Mike Oskin may serve as PI and Chris Crosby as data center.

    I have not heard about other plans for air photos, though if there is a helicopter recon hopefully good obliques can be obtained (as we just did for Haiti on the Enriquillo a few weeks ago) - see attached preprint of our SRL paper (in press) on the technique. Basically, take a camera with embedded GPS tagging and keep taking photos at a rate of once every half-second while flying at about 500 feet above ground level and at an offset of about 300 to 500 feet off to the side of the fault as you go. Bring extra memory cards and batteries.

    Let me know if USGS can help in any way. I have not heard confirmation yet of whether or not the International Charter has been activated for satellite imagery. Hopefully that will occur soon, as was done for Haiti and Chile most recently.

    The NEIC event summary has just been updated -- please click this link and hit reload to see the newest version.

        http://earthquake.usgs.gov/earthquakes/recenteqsus/Quakes/ci14607652.php...

    I hope this quick note is helpful, and please cc' me if anyone starts getting surface rupture information.

    Regards,

        Ken

    - - -

    From the internet - I don't know where this was taken -- thanks to Stacey Martin and Bob Dollar for passing it along:

    http://tweetphoto.com/17203656

  • dagnew
    2010.04.04 - El Mayor - Cucapah Earthquake   12 years 26 weeks ago

    The sites in this list would be useful in helping to constrain the northward extent of slip; they all have good prior history, and fill in the space between the continuous sites.

     Name   Lat                Long            El     NGS PID 

                Stamping

     1103 32.674727 -115.883201   95.7   DB1730

             HPGN CALIF 11-03 1990
     O225 32.648106 -115.725463   81.6   DB1560

            OFFSET 225 1934
     WORM 32.678497 -115.673453  -36.4   DB1019

           WORM 1977
     VP14 32.740250 -115.714220  -41.5  --------

           IVPN 114
     I021 32.779549 -115.898553   28.9   DB0808

          X 90 1931
     OCOT 32.790102 -115.796190  -36.9   DB1234

           OCOTILLO NCMN 1982
     I019 32.788955 -115.729395  -45.1   DB0740

            F 612 1941
     I018 32.799994 -115.646440  -44.4   DB0763

             D 1223 1971

     O227 32.641422 -115.817352   70.2   DB1571

           OFFSET 227 1934
     

  • fialko
    2010.04.04 - El Mayor - Cucapah Earthquake   12 years 26 weeks ago

     Someone will be at the base station guarding the instrument at all times during the deployment.

  • baagaard
    2010.04.04 - El Mayor - Cucapah Earthquake   12 years 26 weeks ago

    Assuming the strike is 321 deg (NW), the plane is still nearly vertical (80 deg), so it is mainly a different rake.

    Best Double Couple:Mo=9.6*10**19 NP1:Strike=220 Dip=43 Slip= -13 NP2: 321 80 -131
  • beroza
    2010.04.04 - El Mayor - Cucapah Earthquake   12 years 26 weeks ago

    The USGS CMT has a more substantial normal faulting component than their initial W-phase moment tensor.

  • huynht
    2010.04.04 - El Mayor - Cucapah Earthquake   12 years 26 weeks ago

    A conference call line is available 24/7 for phone communications.

    Dedicated Dial-In Number
    1 (218) 936-7979
    Access Code
    565853

    See Institutional Resources menu.

  • bowman
    2010.04.04 - El Mayor - Cucapah Earthquake   12 years 26 weeks ago

    I assume you'll have someone there at all times, Yuri?  I'm trying to get permission to go to Mexico despite an existing (and very strict) travel ban, but not sure when it'll happen.  Must get permission from the CSU Chancellor's Office to take State Vehicles - I've already been in contact and am "dialoging" with them.  Assuming we get the green light (or even a yellow light) I'll have a handful of students and trucks ready to help.

  • gareth
    2010.04.04 - El Mayor - Cucapah Earthquake   12 years 26 weeks ago

    We (4 of us) will be leaving out of Riverside around 6 am, with the aim of rendezvousing with Dave Sandwell and his people in Calexico at 9 am. We will be bringing three Trimble R7s, in this first instance. We will probably be able to bring more on subsequent trips.

  • beroza
    2010.04.04 - El Mayor - Cucapah Earthquake   12 years 26 weeks ago

    Interesting - healthy foreshock sequence too.

  • fialko
    2010.04.04 - El Mayor - Cucapah Earthquake   12 years 26 weeks ago

    Our base camp (site of a "continuous" GPS occupation) will be at the LPUR benchmark (Lat 32.355736, Lon -115.342906). 

  • walls
    2010.04.04 - El Mayor - Cucapah Earthquake   12 years 26 weeks ago

    In the UNAVCO San Clemente office we have tooling and materials for 5 PBO/SCIGN SDBM stations that could be rapidly deployed if target locations were permitted quickly.   Recievers and antennas would be TBD.  Deployment in Mexico is subject to Greg Anderson's approval.

    Field engineering support may be available depending on specific needs.

    To request UNAVCO support please use the online form at:

    http://achaia.unavco.org/public/newproject/supportform.aspx

  • blume
    2010.04.04 - El Mayor - Cucapah Earthquake   12 years 26 weeks ago

    We have 20 field-ready complete campaign systems that can be shipped to southern California on Monday for short-term (4-6 weeks maximum) use.  These are Topcon GB-1000 systems from the EarthScope/PBO pool - their use in Mexico is subject to Greg Anderson's approval.

    Field engineering support may be available depending on specific needs.

    To request UNAVCO support please use the online form at:

    http://achaia.unavco.org/public/newproject/supportform.aspx

     

    Freddy Blume

  • huynht
    2010.04.04 - El Mayor - Cucapah Earthquake   12 years 26 weeks ago

    Have emailed John Marquis to allow John Fletcher to access this website and post information.

  • weldon
    2010.04.04 - El Mayor - Cucapah Earthquake   12 years 26 weeks ago

    By chance I am doing field work near Coachella and could join a field response if there is one; my cell is 541-510-4270 - Ray