Natural Laboratory ESA SAR Data for Download
index of Van event SAR data for download
ENVISAT:
It would be very helpful if the following ASAR images could
be acquired in I6 mode, polarization HH, with level 0 (raw) processing:
tracks 394 and 1221, frames 2817-2853
track 344, frames 729-765
track 71, frames 729-783
track 229, frames 765-783
The more frequently the above images are acquired, the more we can learn about
the post-seismic strain field.
Unwrapped phase of the 2011/10/31-2011/11/30 ASAR-ENVISAT InSAR pair
(Postseismic, Track 121, IS6, Descending). The fringes close to the
epicentral area, on the west side of the Ercek Lake are likely
noteworthy. Data processing was carried out at the Istituto Nazionale di
Geofisica e Vulcanologia, the "Osservatorio Vesuviano" Naples branch
(INGV-OV), Italy, by Sven Borgstrom and Valeria Siniscalchi, with
Envisat raw data provided by the European Space Agency (ESA) in the
frame of the Supersites initiative. Results obtained with ROI_PAC 3.0.1
from JPL, with orbits from the ESA DORIS web service (preliminary orbits
for the Nov. 30, 2011 acquisition). The red star is the epicenter of the
M7.2 Van earthquake of October 23, 2011
Unwrapped phase of the 2010/11/05-2011/10/31 (track 121, IS6,
descending, right) and the 2011/07/22-2011/11/19 (track 394, IS6,
descending, left) ASAR-Envisat InSAR pairs. Data processing was carried
out at the Istituto Nazionale di Geofisica e Vulcanologia, the
"Osservatorio Vesuviano" Naples branch (INGV-OV), Italy, by Sven
Borgstrom and Valeria Siniscalchi with Envisat raw data provided by the
European Space Agency (ESA) in the frame of the Supersites initiative.
Results obtained with ROI_PAC 3.0.1 from JPL, with orbits from the ESA
DORIS web service (preliminary orbits for the Oct. 31, 2011 and Nov. 19,
2011 acquisitions). The red star is the epicenter of the M7.2 Van
earthquake of October 23, 2011
Coseismic Envisat interferogram of the combined descending tracks, 121
and 394. The images have been acquired on 2010/11/05 and 2011/10/31,
2011/07/22 and 2011/11/19 respectively. Processing was done by Hannes
Bathke within the framework of the PROGRESS project at GFZ Potsdam,
using the softwares ROI_Pac and Doris. Envisat data has been provided
through the Supersite. An image in a high resolution and a .kml file is
available ( here ).
Envisat ASAR interferogram showing coseismic displacement due to the Van
Earthquake. This interferogram was generated using two images acquired
from the descending orbit ,Track 121, on 2010/11/05 and 2011/10/31
provided by ESA. The DOR orbit was used to process the 2010 image and
POR orbit for 2011 acquisition. The baseline was reestimated during the
processing. ROI_PAC was used to process this interferogram. Each fringe
shows 2.8 cm of displacement in the line of sight direction. Processed
by Heresh Fattahi and Fernando Greene at InSAR-Lab, University of Miami.
Unwrapped phase of the 2010/11/05-2011/10/31 ASAR-Envisat InSAR pair
(track 121, IM Swath6, Descending Orbits). Data processing was carried
out by Sven Borgstrom and Valeria Siniscalchi at the Istituto Nazionale
di Geofisica e Vulcanologia, the "Osservatorio Vesuviano" Naples branch
(INGV-OV), Italy, with Envisat raw data provided by the European Space
Agency (ESA) in the frame of the Supersites initiative. Results obtained
with ROI_PAC 3.0.1 from JPL, with orbits from the ESA DORIS web service
(preliminary orbits for the Oct. 31, 2011 acquisition). The red star is
the location of the M7.2 Van earthquake of October 23, 2011.
Envisat interferometric (InSAR) map of coseismic displacements in the
radar line-of-sight (LOS, 41 degrees from vertical and roughly west).
Derived from Envisat ASAR (beam IS6, descending track 121) data acquired on 2010/11/05 and
2011/10/31. Precise POR orbits from ESA were used for data processing,
and one color cycle represents 2.8 cm of LOS displacements. Processed by
Sang-Ho Yun of the ARIA project at JPL-Caltech, using ROI_PAC. The
seismicity plot is from USGS Latest Earthquakes. Envisat original data (c) 2011 ESA, provided through this Supersite. Google Earth .kmz file available
here.
ENVISAT differential interferogram derived from the scenes acquired on
05/10/2010 and 31/10/2011, along descending orbits (Swath: IS6, Track:
121); one color cycle corresponds to about 2.8 cm displacement in the
radar line of site. The interferogram has been produced at IREA-CNR
(Napoli, Italy) by using the preliminary ENVISAT orbit products. ENVISAT
raw data have been provided by the European Space Agency. KMZ file
ENVISAT differential interferogram derived from the scenes acquired on
05/10/2010 and 31/10/2011, along descending orbits (Swath: IS6, Track:
121); one color cycle corresponds to about 2.8 cm displacement in the
radar line of sight. The interferogram has been produced at IREA-CNR
(Napoli, Italy) by using the satellite predicted orbits. ENVISAT raw
data provided by the European Space Agency.
TerraSAR-X:
Post-earthquake TerraSAR-X observations have been planned by the Charter.
The Supersites will acquire additional imagery in the following months
to resolve rapid post-seismic deformation. To download TerraSAR-X,
please see this simple index
Preliminary time-series analysis of postseismic
deformation following the Van earthquake using TerraSAR-X data. The negative
values in the time-series plot correspond to line-of-sight (LOS) subsidence
while the positive values correspond to LOS uplift.
The interferometric processing was done by DORIS software, developed by the
Delft Institute for Earth-Oriented Space Research (DEOS), Delft University of
Technology, and the time-series analysis was performed using the Small
Baseline approach implemented in Stamps software
(http://radar.tudelft.nl/~ahooper/stamps/index.html)
Mahdi Motagh of GFZ Potsdam made a TerraSAR-X interferogram using images
obtained November 9-20, 2011. The fringes
over Van city should be related to the big aftershock of Mw 5.6,
November 09, 2011 earthquake. Each color cycle corresponds to 1.5 cm of
displacement in the radar line-of-sight (LOS) direction.
This interferogram is also available as a geocoded TIFF and a
KML file.
Mahdi Motagh of GFZ Potsdam made a TerraSAR-X interferogram using images
acquired on 20111029 and 20111109. Each fringe represents 1.5 cm of
displacement in the line-of-sight (LOS) direction of the satellite.
This interferogram is also available as a geocoded TIFF and a
KML file.
COSMO-SkyMed:
Cosmo-SkyMed: At this time this sensor is not available for scientific
use by the Supersites community.
COSMO-SkyMed (CSK) interferogram (InSAR) rewrapped with 20 cm color
contours showing displacements in the radar line-of-sight (28 degrees
from vertical and roughly west). Derived from CSK scenes acquired
2011/10/10 and 2011/10/26, processed from the raw data. Processed by
Eric Fielding for the JPL-Caltech ARIA project at the NASA Jet
Propulsion Laboratory and for the NASA Earth Surface and Interior Focus
Area. COSMO-SkyMed original data are copyright 2011 Italian Space Agency
(ASI) and were provided under the ASI CSK AO PI project 2271. Google
Earth .kmz file available
here.
COSMO-SkyMed (CSK) unwrapped interferogram (InSAR) map of displacements
in the radar line-of-sight (28 degrees from vertical and roughly west).
Derived from CSK scenes acquired 2011/10/10 and 2011/10/26. Color scale
+/-0.8 m with negative range change meaning up and east (towards
satellite). Processed by Eric Fielding of the JPL-Caltech ARIA project. COSMO-SkyMed original data are copyright 2011 Italian Space Agency (ASI) and were provided under the ASI CSK AO PI project 2271. Google Earth .kmz file available here.
COSMO-SkyMed (CSK) SAR pixel offsets (sub-pixel correlation) map of displacements in the radar line-of-sight (28 degrees from vertical and roughly west). Derived from CSK scenes acquired 2011/10/10 and 2011/10/26. Color wrap 1.5 m. Processed by Eric Fielding of the JPL-Caltech ARIA project. COSMO-SkyMed original data are copyright 2011 Italian Space Agency (ASI) and were provided under the ASI CSK AO PI project 2271. Google Earth .kmz file available here.
Preliminary differential interferogram from COSMO-SkyMed data (October
10 - October 23, 2011). COSMO data have been provided in the framework
of SAFER FP7 Project. Interferogram prepared by Salvatore Stramondo of Istituto Nazionale di Geofisica e Vulcanologia.
Unwrapped phase from COSMO-SkyMed data (October 10 - October 23,
2011). COSMO-SkyMed data have been provided in the framework of SAFER
FP7 Project.
SAR, Visible, GPS, Strain , Earthquakes, Links
Visible/Infrared Images
SAR, Visible, GPS, Strain, Earthquakes, Links
GPS Data
UNAVCO's GPS data archive interface for this earthquake.
Two months of GPS data will be made available, before and after the earthquake. You can download the data using the CORS GPS archive clickable map or
a simple index.
Coseismic displacement field, based on Turkish CGPS network:
TUSAGA-AKTIF. Basically, the CORS stations can constrain the fault
strike (between MORA and OZAL and through TVAN) - consistent with
the InSAR and focal mechanism. Figure contributed by Semih Ergintav of
the Earth and Marine Sciences Institute Gebze, Kocaeli, TURKEY. This first version of
the
coseismic field was calculated by Dr. Rahsan Cakmak
(TUBITAK MRC EMSI).
SAR, Visible, GPS, Strain, Earthquakes, Links
Strain
SAR, Visible, GPS, Strain, Earthquakes, Links
Earthquake Data
Ground Motion
Seismicity
Dr. M. Nurcan Ozel of B. U. Kandilli Observatory and Earthquake Research Institute
has written a Google Map animation of aftershocks, to illustrate the release of
seismic energy in the region. Click on the static image above to visit the
dynamic page.
The previous earthquake solutions (from Tan, O., 2004. PhD thesis).
Black: Tan (2004); Gray: Harvard-CMT; Orange: Orgulu et al., 2003 (GRL),
Blue: Taymaz, 1997 (TUBITAK report no YBAG-100). Stars show the
historical earthquakes.
This map of aftershocks with the mainshock focal mechanism was prepared by Onur Tan (TUBITAK, MAM).
This map of aftershocks with larger focal mechanisms was prepared by the Aktif Tektonik Arastirma Grubu.
Stuart Wier prepared this map of historical seismicity using the IRIS Earthquake Browser.
The most recent event shown is from 10 October 2011. Purple quakes have depths <= 33 km, all others deeper.
Sinan Akciz and Jascha Polet provided figures showing mainshock and aftershock locations from Bogaziçi University, Kandilli Observatory and Earthquake Research Institute and the Disaster and Emergency Management Presidency in Turkey.
IRIS
Seismic Source
SIGRIS report on Co-seismic ground displacement and preliminary source
models, by S. Atzori, C. Tolomei, S. Salvi and S. Zoffoli.
This fit of the mainshock focal mechanism to waveforms was prepared by Onur Tan (TUBITAK, MAM).
Finite fault Model by Gavin Hayes, USGS NEIC. The figures above show slip on one of the two possible nodal planes and a fit to body waves.
US Geological Survey
The Global Centroid-Moment-Tensor (CMT) Project
SAR, Visible, GPS, Strain , Earthquakes, Links
Reports
Links
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