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  • hudnut
    2011.10.23 - M7.2 Eastern Turkey   10 years 49 weeks ago

    USGS NEIC Event Executive Summary

     

    Mw 7.2   Eastern Turkey

    October 23, 2011 10:41:21


    Version 1

    

38.63N 43.49E Depth 20km

    
Location Last Updated at 10/23/2011 07:09:33  (Mountain Time)

    Event Coordinator: Benz, Harley M.(benz@usgs.gov)

    Nearest Cities


    19 km (12 miles) NE (43°) from Van, Turkey 
116 km (72 miles) N (351°) from Hakkari, Turkey 
130 km (81 miles) SSE (161°) from Karakose (Agri), Turkey 
192 km (119 miles) SSW (206°) from YEREVAN, Armenia

    Tectonic Summary


    Turkey is a tectonically active country that experiences frequent destructive earthquakes. On a broad scale, the seismtectonics of the region near the October 23, 2011 earthquake is controlled by the collision of the Arabian Plate and the Eurasian Plate with northerly convergence of the Arabian plate at a rate of approximately 24 mm/y. West of the October 23, 2011 earthquake the tectonics is dominated by strike-slip faulting on the East and North Anatolian fault zones. These large fault systems extend across much of central and western Turkey accommodating the western motion of the Anatolian block as it is being squeezed by the converging Arabian and Eurasian Plates. In the area of Lake Van and further east, tectonics are dominated by the Bitlis Suture Zone in eastern Turkey and Zagros fold and thrust belt of Iran. The October 23, 2011 earthquake occurred in a broad region of convergence beyond the eastern extent of Anatolian strike-slip tectonics. The focal mechanism of today’s earthquake is consistent with oblique-thrust faulting on a south-southwest trending fault, similar to the trend of mapped faults in the region. 

This earthquake is a reminder of the many deadly seismic events that Turkey has suffered in the recent past. The devastating Izmit earthquake of 1999 (M = 7.6) broke a section of the North Anatolian Fault 1000 km to the west of the October 23 event and killed 17,000 people, injured 50,000, and left 500,000 homeless. Approximately 70 km from the October 23, 2011 earthquake a M7 earthquake occurred on November 11, 1976 destroying several villages near the Turkey and Iran border and killing several thousand people. A M8.0 earthquake struck Erzincan in 1939, killing an estimated 33,000 people.

    Talking Points

    •  Complex region of faulting dominated by compressional tectonics associated with the Bitlis Suture Zone and Zagros Fold and Thrust belt

    •  Generally east-west trending thrust fault with waveform controlled depth of 20 km

    •  Within about 70 km of the November 11, 1976 M7 earthquake that killed 3,900 people

     

    Historical Seismicity


    Within approximately 400 km of the epicenter there have been 3 destructive earthquakes since the mid-1970s. These were 

1975/09/08 M6.7 MMI(max)VIII Deaths: 2,370 Dist from epi: 241 km 
1976/11/24 M7.0 MMI(max)IX Deaths: 3,900 Dist from epi: 66 km 
1992/03/13 M6.6 MMI(max)IX Deaths: 498 Dist from epi: 358 km

    Style of Faulting: Thrust

    Centroid Moment Tensor


    11/10/23 10:41:21.73 

Epicenter:  38.710   43.446 
MW 7.3 

USGS CENTROID MOMENT TENSOR 
11/10/23 10:41:44.50 
Centroid:  39.451   43.354 
Depth  16         No. of sta: 159 
Moment Tensor;   Scale 10**19 Nm 
  Mrr= 5.89       Mtt=-6.13 
  Mpp= 0.24       Mrt= 7.73 
  Mrp= 1.60       Mtp=-0.51 
 Principal axes: 
  T  Val=  9.83  Plg=63  Azm=344 
  N        0.22       4       81 
  P       -10.05      26      173 

Best Double Couple:Mo=9.9*10**19 
 NP1:Strike= 80 Dip=71 Slip=  86 
 NP2:       272     19       101

    W Phase Moment tensor
11/10/23 10:41:21 

Epicenter:  38.627   43.534 
MW 7.2 

USGS/WPHASE CENTROID MOMENT TENSOR 
11/10/23 10:41:21.00 
Centroid:   38.527   43.790 
Depth  11         No. of sta: 89 
Moment Tensor;   Scale 10**19 Nm 
  Mrr= 5.09       Mtt=-5.75 
  Mpp= 0.66       Mrt=-4.00 
  Mrp=-3.80       Mtp=-0.45 
 Principal axes: 
  T  Val=  8.07  Plg=60  Azm=118 
  N     = -0.65      19      248 
  P     = -7.43      20      346 

Best Double Couple:Mo=7.8*10**19 
 NP1:Strike=108 Dip=30 Slip= 133 
 NP2:       240     69        68

    PAGER Population Exposure
MMI VI  482K 
MMI VII 265K 
MMI VIII 67K 
MMI IX  377K 
MMI X   29K

    Reported Damage
Preliminary reports of collapsed structures in Van, Turkey and widespread outage of power and communication

    Links to News Articles
http://www.msnbc.msn.com/id/45005013/ns/world_news-europe/http://www.bbc.co.uk/news/world-europe-15421633http://www.hurriyetdailynews.com/n.php?n=quake-hits-se-turkey-2011-10-23

    USGS Event Link
     http://earthquake.usgs.gov/earthquakes/eqinthenews/2011/usb0006bqc/

    Prompt Assessment of Earthquakes for Response
      http://earthquake.usgs.gov/earthquakes/pager/events/us/b0006bqc/index.html

     

    If there are any changes, suggestions, questions, or comments about this particular email, please contact benz@usgs.gov

  • hudnut
    2011.10.23 - M7.2 Eastern Turkey   10 years 49 weeks ago
    Thanks, I will try to relay any significant updates. I'll post a comment to the top-level event page that contains the v.1 USGS NEIC Event Summary right now.
  • tjordan
    2011.10.23 - M7.2 Eastern Turkey   10 years 49 weeks ago
    We have put up this response site to encourage the exchange of information about this event, which is a significant disaster and may provide some insights for us here in California. Can the USGS folks keep us informed of the US response?
  • hudnut
    2011.10.21 - Day-Afer-ShakeOut Table-Top Exercise   10 years 49 weeks ago

    This information is provided by David Phillips at UNAVCO (sent by e-mail):

    UNAVCO would be able to provide at least 2 terrestrial LIDAR (TLS) systems with trained operators.  Additional UNAVCO or shared (via CWU, UTD, KU, etc.) TLS systems would also be available though trained operators would need to be identified from within UNAVCO or the community.  Besides traditional scanning methods, we could explore deployment of 1 or more scanners in a semi-permanent mode to help detect post-seismic displacements through time.

    David A. Phillips, Ph.D.
    Geodetic Imaging Project Manager
    UNAVCO
    6350 Nautilus Drive, Boulder, CO 80301
    Tel: 303-381-7471, Fax: 303-381-7451
    phillips@unavco.org
    www.unavco.org <http://www.unavco.org/>

  • hudnut
    2011.10.21 - Day-Afer-ShakeOut Table-Top Exercise   10 years 49 weeks ago
    Hi Lisa, I would encourage you to view Anne Rosinski's ppt briefing slides and direct questions to her about the Clearinghouse. In this year's scenario 'play' we did not make a strong distinction because we were just simulating the first few hours after the event. Normally, I believe the formal Clearinghouse is expected to be up and functional in a slightly longer time frame (24-48 hours or so). This timing issue was discussed during the Sunday forum at the 2011 Annual SCEC meeting session as well, and is a matter for future discussion. Once the Clearinghouse is established, all data collected up to that point in time will be transferred over into the new GIS system that was the subject of the second part of Anne's presentation. If it looks possible for us to directly use the new system, then we at USGS Pasadena will start loading data into the new GIS system directly early on. That is, the virtual clearinghouse may go into use immediately.
  • lgrant
    2011.10.21 - Day-Afer-ShakeOut Table-Top Exercise   10 years 49 weeks ago
    Nice map. Has the clearinghouse been established yet? Will it be in Pasadena or elsewhere?
  • kmilner
    2011.10.21 - Day-Afer-ShakeOut Table-Top Exercise   10 years 49 weeks ago

    Hi All, I created a ShakeMap for a similar rupture in the CyberShake 1.0 database. CyberShake results are interpolated on top of a Campbell & Bozorgnia 2008 (CB 2008) base map. Log base 10 of 3 second Spectral Acceleration is given. The rupture is from UCER2, a mag 7.45 on the San Cayetano.

    CB 2008 base map only: http://opensha.usc.edu/ftp/kmilner/cybershake/2011shakeout/basemap.150.png

    CB 2008 + CyberShake: http://opensha.usc.edu/ftp/kmilner/cybershake/2011shakeout/interpolated....

    Kevin Milner

  • fielding
    2011.10.21 - Day-Afer-ShakeOut Table-Top Exercise   10 years 49 weeks ago

    TerraSAR-X (TSX) has been acquiring data over the Los Angeles Supersite on two tracks, one ascending and one descending. I attach the map of the available coverage of archive data. Most recent scene was 16 Oct. 2011 on descending track 167, so next pass will be 27 Oct. On ascending track 144 over LA, the most recent scene was 19 March 2011. Obviously, this won't help too much for the Ventura scenario earthquake for InSAR or SAR pixel offset tracking analysis. 

  • shyun
    2011.10.21 - Day-Afer-ShakeOut Table-Top Exercise   10 years 49 weeks ago
    As for Envisat data there is actually another potential data acquisition slightly earlier from ascending orbit at 2011.10.27 5:47 AM GMT. Thus, the DPM would become available at 2011.10.29 6:47 AM GMT.
  • arrowsmi
    2011.10.21 - Day-Afer-ShakeOut Table-Top Exercise   10 years 49 weeks ago
    This one has graticles so if one had to pick of basic lat longs for tasking, it could work. Does make the point of needing to have these basic data handy and ready for assembly in a GIS.
  • fielding
    2011.10.21 - Day-Afer-ShakeOut Table-Top Exercise   10 years 49 weeks ago
    Envisat has been acquiring regular images on the descending SAR track 70 that covers Ventura, due to WInSAR tasking requests. Most recent image was 27 Sept. 2011, next pass is 27 October at 18:00 GMT (as Sang-Ho listed) is already planned for acquisition. I attach a preview of the September SAR scene.
  • rolohman
    2011.10.21 - Day-Afer-ShakeOut Table-Top Exercise   10 years 49 weeks ago
    Just got out of class and am checking in now. The earthquake shows up very well on our drum recorder in the building - I'm surprised that our classes weren't interrupted with requests from the media. It sounds like Eric and Yuri have done a great job of identifying the initial needs in terms of geodesy (InSAR calls and early occupations of GPS data). I will start looking for funds for some installations of more permanent GPS sites in the event that we think those will be useful.
  • fielding
    2011.10.21 - Day-Afer-ShakeOut Table-Top Exercise   10 years 49 weeks ago
    It looks like the next pass of a CSK repeating the archived CSK data will be the CSK1 satellite at 2011-OCT-24 02:04:30.0 (UTC). CSK data typically available within 3-4 hours after acquisition and includes the precise orbits.
  • arrowsmi
    2011.10.21 - Day-Afer-ShakeOut Table-Top Exercise   10 years 49 weeks ago

    From OpenTopography data discovery interface from USGS Click and EarthScope coverage: http://opentopo.sdsc.edu/gridsphere/gridsphere?cid=datasets

  • fielding
    2011.10.21 - Day-Afer-ShakeOut Table-Top Exercise   10 years 49 weeks ago

    Here is a map of the available archived COSMO-SkyMed SAR images. We are fortunate that they have been regularly acquiring data on one track over the area north of Ventura. The most recent acquisition was 16 October 2011 using CSK2 satellite in right-looking mode at about 23-degree incidence angle. ++Eric

     

  • briggs
    2011.10.21 - Day-Afer-ShakeOut Table-Top Exercise   10 years 49 weeks ago
    A raw (level 1A) pre-earthquake pan SPOT5 scene (5m resolution) and metadata from 21 Aug 2010 is at: ftp://ftpext.usgs.gov/pub/cr/co/golden/briggs/Ventura_M7.6_scenario/ We're coordinating with EROS and Rocky to task post-EQ imagery for subpixel correlation.
  • shyun
    2011.10.21 - Day-Afer-ShakeOut Table-Top Exercise   10 years 49 weeks ago

    Damage proxy map of Los Angeles derived from InSAR coherence of ALOS PALSAR data. The red pixels represent significant surface change during the time period of 2007.02.15 - 2008.02.18. Most of them are due to building demolition or construction projects, which can be confirmed by comparing with Google Earth's historical imagery of similar dates, using the time slider. For example, try to locate Pasadena City College and see how the red pixels correlate with the campus remodeling projcet over the time period.

    After the major earthquake hits Los Angeles area at 2011.10.21 06:00:00 PM GMT, this type of damage proxy map that would show major building damage can be made available to responding agencies at the following times, derived from the indicated platforms, considering their orbit plans, data transfer latencies, and processing time.

    SAR data are acquired at:
    2011.10.22 01:42 AM GMT - TerraSAR-X
    2011.10.22 01:58 AM GMT - COSMO-SkyMed (CSM3)
    2011.10.22 06:00 PM GMT - UAVSAR
    2011.10.24 01:48 AM GMT - Radarsat-2
    2011.10.27 06:00 PM GMT - Envisat

    Damage proxy map becomes available at:
    2011.10.22 05:58 AM GMT - COSMO-SkyMed (data transfer latency: 3 hrs)
    2011.10.24 03:48 AM GMT - Radarsat-2 (Data transfer latency: 1 hr)
    2011.10.24 06:00 PM GMT - UAVSAR (Overall latency: 3 days)
    2011.10.27 02:42 AM GMT - TerraSAR-X (Data transfer latency: 5 days)
    2011.10.29 07:00 PM GMT - Envisat (Orbit data latency: 2 days)

    Two pre-quake scenes are assumed to be available.

    Provided by ARIA project at JPL/Caltech
    Contact aria@jpl.nasa.gov or aria@caltech.edu for more information.

  • arrowsmi
    2011.10.21 - Day-Afer-ShakeOut Table-Top Exercise   10 years 49 weeks ago

    maybe it is just my ears, but it is a little hard to hear, maybe just people in the room there? 

  • arrowsmi
    2011.10.21 - Day-Afer-ShakeOut Table-Top Exercise   10 years 49 weeks ago

    Here is a broader extent

  • tjordan
    2011.10.21 - Day-Afer-ShakeOut Table-Top Exercise   10 years 49 weeks ago
    Looks from ShakeMap that the rupture included the fault west of this view (maybe all the way to Ventura). Do you have that image?
  • arrowsmi
    2011.10.21 - Day-Afer-ShakeOut Table-Top Exercise   10 years 49 weeks ago

    Image of the topography (lidar hillshade) and USGS fault traces; of course assuming that it occurs along this system (where we think it should?)

  • walls
    2011.10.21 - Day-Afer-ShakeOut Table-Top Exercise   10 years 49 weeks ago
    Walls sat. phone 881 63 168 1137
  • fielding
    2011.10.21 - Day-Afer-ShakeOut Table-Top Exercise   10 years 49 weeks ago
    Sang-Ho Yun and I are checking for next SAR satellite overpasses. Unfortunately, it is night on a weekend in Europe, so acquisition requests through our established "science" data channels will be delayed, possibly until Monday. I don't know whether Disaster Charter will be invoked. I guess that is up to USGS? ++Eric
  • fialko
    2011.10.21 - Day-Afer-ShakeOut Table-Top Exercise   10 years 49 weeks ago
    Chris, my Sat. phone number is 881632570185.
  • fialko
    2011.10.21 - Day-Afer-ShakeOut Table-Top Exercise   10 years 49 weeks ago
    We have a group of 3 people with 4 GPS sets driving to Ventura. The plan is to occupy near-field campaign sites. The initial occupation/meeting place is site WARN (just north of the rupture).