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

     Do Fialko and Sandwell need field helpers and/or vehicles?  

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

    It's an agreement for accessing data collected from space by various agencies, following natural disasters: http://www.disasterscharter.org/home

     

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

    For those unclear on what this is about.... like me.

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

    Are you in contact with scientists in Mexico? It will be awkward (and perhaps impossible) to mount a field campaign without thier direct participation.

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

     Yuri - do you know if Mexico is planning to invoke the International Charter?

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

    Thanks Ken.  Here's the USGS Solution;

    Best Double Couple:Mo=6.8*10**19 NP1:Strike=222 Dip=59 Slip= -14 NP2: 319 77 -147
  • fialko
    2010.04.04 - El Mayor - Cucapah Earthquake   12 years 25 weeks ago

    Sandwell and Fialko are coordinating a GPS campaign (possibly tomorrow, Apr. 5). A number of benchmarks were installed last month in the Cerro Prieto area. We also plan to occupy the nearby SCEC CMM benchmarks. 

    Also, the epicentral area is pretty arid. InSAR should work well (now that the hypocentral depth was revised from 30 to 10 km). We are going to ask space agencies to provide near-real time SAR through WInSAR. 

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

     

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

    I tried email to Alejandro Nava as well - no word back.

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

    I emailed John Fletcher and Arturo Martin-Barajas. I also tried to call Arturo's cell phone but 'all circuits are busy.' Arturo is a good contact - he is the current chair of the geosciences group at CICESE, and also fluent in english. His cell number is 01152 646 1361844 for anyone that wants to try contacting him. The CICESE office number is 01152 646 1750500.

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

    Thanks for the updates.  This event sure makes the case for closer cross-border collaboration.  I haven't yet reached Jim or Sue.  Xyoli replied though.  She got a phone call from Carlos Valdes (current head of SSN) who is on his way to the SSN. FWIW, he told her that their station in Mexicali went out 7 minutes after the earthquake hit.

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

    I just sent an e-mail to Allen Husker at UNAM to see if he has any additional information or if anyone from UNAM is planning a deployment.

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

    Javier Gonzàlez-Garcìa (CICESE) attended the last SCEC Annual Meeting - has worked with Hudnut. Try contacting him: javier@cicese.mx

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

    I have a collaborative project w/geologists at CICESE. One of them (John Fletcher) has worked on the neotectonics of the Laguna Salada region. I will try to contact them.

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

    Shaking lasted about 40 secs in Encinitas.  Poll sloshed over the edge.   Tried to call Rockwell and left a message.  I see the magnitude just got updated.  How about the location?

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

    Does anyone have more information on this event?  I've contacted Xyoli Perez-Campos at UNAM and will let you know if I hear anything. CICESE's website seems to be up.  Anyone with good contacts there?  I'll contact Brune and Hough, because I know that they have contacts.

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

    I am trying to get in contact with Tom Rockwell about organizing a field response. It seems to early to tell right now even what fault this may be (Cerro Prieto? Laguna Salada?). Is there a focal mechanism? Can't find one at USGS site yet.

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

    The aftershocks seem to be aligned to the north, though it's difficult to know if that's real or an artifact given the network geometry.
    It looks as though the largest aftershock, M 5.1, was in the Brawley seismic zone (though the rms residuals are 0.5 s).

  • hudnut
    Field meeting sites   12 years 49 weeks ago

    Yesterday during the tabletop discussions, and in several meetings leading up to that, we were able to have a few key things clarified about roles and expectations.

    Jerry Treiman of CGS and Katherine Kendrick of USGS were involved in these discussions, as was Ralph Loyd of CGS, Kate Long of Cal EMA, and Steve Walter at USGS Menlo Park among others.

    We recognized that there is the immediate need for a coarse yet synoptic overview of the rupture that is of immediate use in, for example, notifying emergency management about the likely locus or quasi-linear distribution of disruption to critical lifeline infrastructure and also for us to modify, update and correct the ShakeMap using info on the finite fault source.

    For the Situation Unit we will not be setting up to handle detailed surface faulting data, such as curvilinear line work in a GIS system. Our data handling within the minutes to hours time frame will be much simpler than that. We hope to get in field reports of GPS position location and observation such as would be reported on the standard form distributed last year by Luke Blair (offset, slip vector info).

    In addition, and in a later time frame, the Clearinghouse will 'stand up' and will be geared towards taking in and compiling surface fault rupture data including rupture mapping line work. It may be more like 6 hrs., 12 hrs. or even 24 hrs. after the time of the earthquake that this capability will be established at the Clearinghouse, at which point we would make a hand-off and transfer all data from the ICS Situation Unit here to the Clearinghouse.

    There are details of this that will still need to be worked out, and this would all be happening during the same time interval that people are establishing the field meeting sites, etc. There is still a need for more discussion to work out this plan, and please count on Jerry, Katherine and me to help share the info from yesterday and the other recent meetings - I think that transfer of info needs to occur soon and that it will be helpful to the overall collective effort. Thanks!

  • rockwell
    Field meeting sites   12 years 49 weeks ago

    Sounds good. It will be easy to mobilize a field group from San Diego - would be nice to have predesignated meeting sites...

  • felzer
    2009.10.15-Great California ShakeOut   12 years 49 weeks ago

    SCENARIO Earthquake Aftershock Probabilities Update

    3:00 pm PST

    Here are updated aftershock probabilities now that 4 hr. 45 min. have passed since the scenario M 7.8 event: 

    This assumes standard (generic) aftershock parameters for Southern California.  The largest aftershock so far occurred at 11:00 am PST, and had a magnitude of 7.0.  Secondary triggering from this aftershock has been included in this current forecast. 

    Within the next hour (3:00 pm – 4:00 pm PST) we can expect approximately 11 M ≥ 4 aftershocks, and 1 M ≥ 5 aftershocks.

    Within the next 12 hours, we can expect approximately 68 M ≥ 4 aftershocks and 7 M ≥ 5 aftershocks.

    The probability, from this time forward, that at least one earthquake larger than M 6 will be triggered is 90%.  The probability that an earthquake larger than M 7 will be triggered is 21%.

    The probability, from this time forward, that an earthquake larger than the M 7.8 mainshock will be triggered is 3.6%.  This probability will fall with time if no exceptionally large aftershock occurs.

    -Karen Felzer

     

  • fialko
    2009.10.15-Great California ShakeOut   12 years 49 weeks ago

    We've got 2 teams led by Sandwell and Agnew heading to occupy campaign sites north and south of the Salton Sea, respectively. Fialko is assembling a 3rd team to survey sites in the Imperial Valley (leaving in about 1 hour). Bock is monitoring he occupations and has a list of stations already surveyed. Sandwell and Agnew are reporting problems with real-time data streaming to the SOPAC archive, so most of data acquired today are stored on GPS receivers. 

  • tjordan
    2009.10.15-Great California ShakeOut   12 years 49 weeks ago

     

  • ganderso
    2009.10.15-Great California ShakeOut   12 years 49 weeks ago

    I'm listening in on the call - Greg A.

  • rolohman
    2009.10.15-Great California ShakeOut   12 years 49 weeks ago

    That's great news - did you get any feel for what the latency would be like for this data?  I.E., whether it would be available through one of the data portals vs. through direct contact with someone at UNAVCO?