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  • fielding
    2011.10.23 - M7.2 Eastern Turkey   5 years 25 weeks ago
    Envisat data acquired over the area around Van in the last year has been loaded into the virtual archive at the GEO Supersites page for Van. The virtual archive directory is linked from the Supersite page. You will need to get a "Supersites user" account from the European Space Agency Earth Observation Help Desk to have access to the data downloads. Write to to request an account. Prof. Semih Ergintav has agreed to serve as science leader for the Van Supersite. Several other images have been posted.
  • eqadmin
    2011.10.23 - M7.2 Eastern Turkey   5 years 25 weeks ago

    On 10/25/11 4:17 PM, Marjorie Greene wrote:

    Also just to let everyone know that the EERI clearinghouse for this event is up at http://www.eqclearinghouse.org/2011-10-23-eastern-turkey/
    We welcome anyone to add a post—you can request a log in at the bottom right of the screen, or send mariana@eeri.org any information that you would like posted.
    We've posted a link to strong motion records from METU. An EERI/METU team will be in the field in a few days and will then hopefully be posting up observations to the clearinghouse site.

    Marjorie

    Marjorie Greene, AICP
    Special Projects Manager
    Earthquake Engineering Research Institute
    499 14th St., Suite 320
    Oakland, CA 94612-1934
    tel: 510 (451-0905)
    fax 510 (451-5411)
    www.eeri.org

  • eqadmin
    2011.10.23 - M7.2 Eastern Turkey   5 years 25 weeks ago

    On 10/25/11 3:59 PM, Rynn Lamb wrote:

    All,

    Below are the recent HDDS entries for the Turkey Earthquake event.

    If anyone has questions or would like to be removed from this list, please let me know.

    Best regards,
    Rynn

    ---------------------------------------

    http://hdds.usgs.gov/hdds2/
    - All HDDS data available through Graphical Viewer
    - Event ID: 201110_Earthquake_Turkey

    http://hdds.usgs.gov/hdds2/feed/subscribe
    - RSS history of recent event data published
    - Requires login for restricted imagery


    TURKEY EARTHQUAKE

    http://eoportal.cr.usgs.gov/hdds2/feed/rss?event=201110_Earthquake_Turkey
    - HDDS2 RSS feed

    IKONOS
    - published 4 images (9 Oct 2011)

    LANDSAT 5 TM
    - published 3 images (12 Sep, 21 Sep 2011)

    SPOT-5
    - published 10 images (1 Aug 2011)

    WORLDVIEW-1
    - published 12 images (4 Oct 2011)

    WORLDVIEW-2
    - published 225 images (27 June, 24 June, 17 May, 6 May 2011)


    PUBLIC AD-HOC:

    DATA/MAP PRODUCTS
    - DLR ZKI Reference Maps

    DATA/SATELLITE/NON_INGESTED
    - ASTER GDEM V2

    DOCS_MISC
    - 1976_Report (Engineering Report on the Muradiye Caldiran)


    RESTRICTED AD-HOC:

    SATELLITE/NATIVE
    - posted original (pre-ingested) imagery: IKONOS, SPOT_DOD, WORLDVIEW-1, WORLDVIEW-2

    SATELLITE/NON_INGESTED
    - posted SPOT_DOD LEVEL 1A (raw) imagery

     

    ~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    Rynn M. Lamb
    Disaster Response Coordinator
    USGS/EROS
    47914 252nd Street
    Sioux Falls, SD 57198
    Ph: 605-594-6958 (office)
    Fax: 605-594-6150 (office)
    Email: lamb@usgs.gov
    EMERGENCIES: 605-496-4925 (cell)

    ~~~~~~~~~~~~~~~~~~~~~~~~~~~~

  • mfloyd
    2011.10.23 - M7.2 Eastern Turkey   5 years 25 weeks ago
    From the published GPS, the lake region looks to be an area of contraction and right-lateral shear: Reilinger et al (2006, Figure 9) model a block boundary just to the north of the lake as having right-lateral slip rate of 11.9 +- 0.4 mm/yr and contractional slip rate of 3.0 +- 0.4 mm/yr. This being the case, and given Gavin's finite fault model showing a significant strike-slip component to the slip as might be expected, it may well be that the most likely plane is the south-dipping one ("Plane 1" in Gavin's solution), which shows oblique right-lateral thrust, as long as this event is behaving according to the observed regional tectonics.
  • eqadmin
    2011.10.23 - M7.2 Eastern Turkey   5 years 26 weeks ago

    On 10/24/11 6:43 PM, Mehmet Celebi wrote:

    John and all:

    During the conference call today, there was discussion/inquiries about surface rupture and that also during the 1976 Caldiran EQ (M7.2). I mentioned of a report from that era (I am one of the authors). I am attaching this report. Scarp pictures/info are on page 42 and other pages. [Please note that this report is 35 years old and was most likely typed on the good old typerwiters and drafting by hand.
     

    I am also copying it to Jay and Marjorie of EERI if they desire to put it in the Clearinghouse site. and also to Carol Prentice as she expressed interest. I hope Tran can put it in SCEC site.
     

    Hope it is useful.

    ****************************************************************************
    > Dr. Mehmet Celebi, P.E.
    > Senior Research Civil Engineer and
    > Manager, Structural Monitoring
    > USGS (MS977)
    > 345 Middlefield Rd.
    > Menlo Park, Ca. 94025
    > Tel:650-329-5623
    > Fax:650-329-5143
    > e-mail: celebi@usgs.gov
     **************************************************************************
     

  • hudnut
    2011.10.23 - M7.2 Eastern Turkey   5 years 26 weeks ago

    At the projected up-dip edge of the south-dipping plane of the W-Phase MT (as described in Gavin Hayes's finite-fault model page), there are definitely active-looking fault scarps there, too. There are many un-mapped yet active-looking structures, and much uncertainty still in the depth and orientation of the rupture plane, so it is a tough search for the causal fault without guidance from imagery or aerial reconnaissance. Attached are KML's of scarps along the up-dip projection. These are near the damaged city of Ercis. Proximity to the up-dip edge and faulting is only suggested and has certainly not been confirmed in any way, but could it help to explain the damage in Ercis?

     

    Here is Gavin's model: http://earthquake.usgs.gov/earthquakes/eqinthenews/2011/usb0006bqc/finit...

  • sakciz
    2011.10.23 - M7.2 Eastern Turkey   5 years 26 weeks ago
    Additional field parties have arrived Van. Surface rupture hunting will continue more extensively tomorrow. We may be looking at rupture along the shallowly N-dipping blind thrust fault. This may explain the wide zone of aftershocks N of the epicenter...
  • sakciz
    2011.10.23 - M7.2 Eastern Turkey   5 years 26 weeks ago

    Attached is a preliminary report made available by the General Directorate of Mineral Research and Exploration. Thi organization is similar to USGS. Text is in Turkish, but figures should be self explanatory. Same group also had a full day in the field today and reported no surface rupture. I could not find out where they actually checked, yet.

  • mfloyd
    2011.10.23 - M7.2 Eastern Turkey   5 years 26 weeks ago

    For everyone's information, attached is a figure showing the (potential) availability of continuous GPS sites in the vicinity of the earthquake that are part of the CORS network (cors_tr_GPS.pdf).

    Also attached is a published figure showing the survey sites and inter-seismic velocities already established (e_turk_vels.pdf).

    We are in touch with our Turkish colleagues regarding rapid access to this CORS data and the likelihood of post-seismic surveys. As one can appreciate, this area is fairly remote from central and western Turkey, so we will see what they can manage.

    Mike Floyd / Rob Reilinger

  • fielding
    2011.10.23 - M7.2 Eastern Turkey   5 years 26 weeks ago
    There is now a GEO Supersites "Other Events" page for the Van earthquake at http://supersites.earthobservations.org/van.php and Envisat SAR data products from the archive and new acquisitions should be posted there when they are delivered. The Supersites Advisory Committee agreed that this event did not quite meet the criteria for a full Event Supersite.
  • eqadmin
    2011.10.23 - M7.2 Eastern Turkey   5 years 26 weeks ago

    Colleagues,

    There will be a conference call today for the purpose of information exchange and coordination of studies regarding yesterday's earthquake in eastern Turkey.

    Times:        2 PM EDT        Noon MDT        11 AM PDT        Monday, 24 October 2011

    Numbers:        703-648-4848        Toll free:  855-547-8255
    Security code:        11614

    I anticipate the call will last no more than one hour.  Any and all interested parties are welcome to participate.

    Regards,

    John

    John R. Filson                                      
    Acting Program Coordinator
    Earthquake Hazards
    U. S. Geological Survey                                
    MS 905 Reston, Virginia 20192
    Phone:  703-648-6785
    Cell:  703-851-0383

  • dolan
    2011.10.23 - M7.2 Eastern Turkey   5 years 26 weeks ago
    Hi Ken, Yes, that whole set of folds and scarps to the southeast is also quite prominent. Clearly at least a couple of active fold-thrust systems extending east-west through the epicentral area. It will be most interesting to see if any of those folds grew co-seismically. Given the proximity of these features to a large numbers of towns, it seems likely that we'll be able to tell from eye-witness reports as things progress. Keep us posted if you hear anything about who might be headed over to Turkey in coming days. James
  • hudnut
    2011.10.23 - M7.2 Eastern Turkey   5 years 26 weeks ago
    Yes, the prominent scarp you mention is the same one I observed scarps along this morning (from Ariva-Tevekli to Kasimoglu-Satibey) during e-mail exchanges with Sinan Akciz and Tom Rockwell. Tom observed features along another lineament farther southeast in the next valley to the south. At this point, yes, the emphasis is shifting north as we see that the regional and local network locations are about 19 km to the NW of the initial teleseismic location from NEIC. I have not heard of anyone planning to go to the field; Sinan will probably report on that later.
  • dolan
    2011.10.23 - M7.2 Eastern Turkey   5 years 26 weeks ago

    Here are a few GoogleEarth screen captures showing the scarps I mentioned in previous message. James

  • dolan
    2011.10.23 - M7.2 Eastern Turkey   5 years 26 weeks ago
    In looking in a bit more detail at Google Earth, there is a nearly continuous 32-km-long north-side-up scarp extending eastward from Van Golu through Mollakasim through Alakoy to Ozkaynak to south of Gulsunler where what looks like the fold front steps northward by 2 km to near Otluca and then continues eastward through Adiguzel and Satibey and then eastward into Ercek Golu. At the west end, there is another prominanet structure about 5 km south of Mollakasim that extends westward into van Golu with significant topographic expression (it forms that prominent peninsular extending into the lake). Looks like a nice active west-west fold-thrust belt...
  • dolan
    2011.10.23 - M7.2 Eastern Turkey   5 years 26 weeks ago
    Hi Ken, The new aftershock maps provided by Sinan suggest that the event was north of where the earlier aftershocks had it. Not sure which set of data is more likely to be accurate, but there are certainly some nice (perhaps fluvially modified) semi-continuous north-side-up scarps extending along the northern edge of that prominent mid-range east-west valley. Has anybody heard who is heading for the epicentral region from Turkey? James
  • hudnut
    2011.10.23 - M7.2 Eastern Turkey   5 years 26 weeks ago

    Thanks to Sinan Akciz and Jascha Polet for links and figures showing mainshock and aftershock locations from Kandilli Obs. and DEPREM. Figures from each are attached.

    Here are their web sites:

    http://www.deprem.gov.tr/sarbis/Deprem/SonDepremler.aspx

    http://www.koeri.boun.edu.tr/sismo/map/en/index.html

  • dolan
    2011.10.23 - M7.2 Eastern Turkey   5 years 26 weeks ago
    Certainly does look as if that east-west extending westward from Ercek Golu through Gedelova could be a fault or possibly fold scarp. I wonder if we had any co-seismic fold growth. that would be quite exciting to document.
  • fielding
    2011.10.23 - M7.2 Eastern Turkey   5 years 26 weeks ago
    The Envisat archive SAR data has been ordered for a GEO Supersite (not sure yet whether it will be full Event Supersite or under "Other"). The web page should be available at some point under http://supersites.earthobservations.org/main.php
  • fielding
    2011.10.23 - M7.2 Eastern Turkey   5 years 26 weeks ago
    I just heard from Ken Hudnut that Turkey has activated the Disaster Charter, so Radarsat-2 should acquire data. The Radarsat-2 Charter data probably won't be available outside of a limited "response" community.
  • fialko
    2011.10.23 - M7.2 Eastern Turkey   5 years 26 weeks ago
    There appears to be no pre-earthquake acquisitions from Radarsat-2. Is there a mechanism to encourage CSA to acquire post-event data (Disaster Charter? Canadian colleagues?).
  • fielding
    2011.10.23 - M7.2 Eastern Turkey   5 years 26 weeks ago
    I think it will be possible to share ESA Envisat data. Not sure if this will be a full GEO Event Supersite or the "other event" category with only ESA data. The data agreements with ASI for CSK data prevent any kind of data sharing, sorry.
  • sakciz
    2011.10.23 - M7.2 Eastern Turkey   5 years 26 weeks ago
    Tom, You know the answer to this question very well... Kondo did a spectacular job with the NAF, but that's it. I am not sure if anybody has mapped here, yet.
  • rockwell
    2011.10.23 - M7.2 Eastern Turkey   5 years 26 weeks ago
    Interesting - no faults are mapped where scarps may be present north or south of the range near the epicenter. Sinan - how well is this area likely to have been mapped, especially by a Quaternary geologist looking for active deformation??
  • hudnut
    2011.10.23 - M7.2 Eastern Turkey   5 years 26 weeks ago

    The event epicenter is within a mountain range. Since the mechanism is thrust (east-west) but the preferred nodal plane is not indicated, it makes sense to look for east-west trending thrust-faulting-related features to the north and south of the epicenter. Tom Rockwell and I have begun to identify a series of features running on both the south and north margins of the mountain range, and a screen shot of these features (view towards the east) is attached.