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1) SAR interferograms published here are analyzed by GSI. The Ministry of Economy, Trade and Industry (METI) and the Japan Aerospace Exploration Agency (JAXA) retain ownership of ALOS/PALSAR data. If you cite a PALSAR interferogram, please indicate that interest and clearly write credit titles on the interferogram as follows. "Analysis by GSI from ALOS raw data of JAXA, METI".

2) If you download a image file, please click the target that you want to save, right-click the image displayed on the screen, and select "Save Target As".


Click here for the position map of these interferograms.
● Also see "Crustal Deformation and Source Fault of the Sichuan (Wenchuan) Earthquake in 2008", GSI Geography and Crustal Dynamics Research Center Topics.


China Sichuan Earthquake (2008/5/12,Mw7.9)

How to understand the SAR interferogram

No. Interferogram Specifications Comments Down
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1 Click image to enlarge Observation date 2008/02/17
2008/05/19

The obvious crustal deformation caused by the earthquake appears.

Accuracy of the used orbit data:High precision orbit data(2008.06.01 update).

※Deformation could not be detected in the area where a sand colored pattern not a rainbow-colored fringes is drawn among white bordered regions in an interferogram. This means the deformation was too steep to be detected by the InSAR analysis.

Observation Mode FBS/HH
FBS/HH
Orbital direction Ascending
Off-nadir
[degree]
34.3
Baseline[m]
(Bperp)
+217
Range
(lat/lon)
31.26/32.46/
103.94/105.04
2 Click image to enlarge Observation date 2008/04/08
2008/05/24

The obvious crustal deformation caused by the earthquake appears.

Accuracy of the used orbit data:High precision orbit data(2008.06.01 update).

※The DEM (Digital Elevation Model) data to use for analysis dose not exist in the area where an interferogram has no data.

Observation Mode FBS/HH
FBS/HH
Orbital direction Ascending
Off-nadir
[degree]
34.3
Baseline[m]
(Bperp)
-196
Range
(lat/lon)
30.73/31.93/
102.46/103.56
3 Click image to enlarge Observation date 2008/02/29
2008/05/31

The obvious crustal deformation caused by the earthquake appears.

Accuracy of the used orbit data:High precision orbit data(2008.06.01 update).

※The influence of disturbance by weather, etc. may be contained.

※The DEM (Digital Elevation Model) data to use for analysis dose not exist in the area where an interferogram has no data.

Observation Mode FBS/HH
FBS/HH
Orbital direction Ascending
Off-nadir
[degree]
34.3
Baseline[m]
(Bperp)
+90
Range
(lat/lon)
31.75/32.95/
104.90/106.00
4 Click image to enlarge Observation date 2008/03/05
2008/06/05

The obvious crustal deformation caused by the earthquake appears.

Accuracy of the used orbit data:High precision orbit data(2008.06.01 update).

※The DEM (Digital Elevation Model) data to use for analysis dose not exist in the area where an interferogram has no data.

Observation Mode FBS/HH
FBS/HH
Orbital direction Ascending
Off-nadir
[degree]
34.3
Baseline[m]
(Bperp)
+283
Range
(lat/lon)
30.94/32.14/
103.50/104.60
5 Click image to enlarge Observation date 2008/04/25
2008/06/10

The obvious crustal deformation caused by the earthquake appears.

Accuracy of the used orbit data:High precision orbit data(2008.06.01 update).

※The DEM (Digital Elevation Model) data to use for analysis dose not exist in the area where an interferogram has no data.

Observation Mode FBD/HH
FBS/HH
Orbital direction Ascending
Off-nadir
[degree]
34.3
Baseline[m]
(Bperp)
-71
Range
(lat/lon)
30.70/31.90/
101.95/103.05
6 Click image to enlarge Observation date 2007/01/28
2008/06/17

The obvious crustal deformation caused by the earthquake appears.

Accuracy of the used orbit data:High precision orbit data(2008.06.01 update).

※The DEM (Digital Elevation Model) data to use for analysis dose not exist in the area where an interferogram has no data.

Observation Mode FBS/HH
FBS/HH
Orbital direction Ascending
Off-nadir
[degree]
34.3
Baseline[m]
(Bperp)
+203
Range
(lat/lon)
31.67/32.87/
104.37/105.47
7 Click image to enlarge Observation date 2007/06/20
2008/06/22

The obvious crustal deformation caused by the earthquake appears.

Accuracy of the used orbit data:High precision orbit data(2008.06.01 update).

※The DEM (Digital Elevation Model) data to use for analysis dose not exist in the area where an interferogram has no data.

Observation Mode FBD/HH
FBS/HH
Orbital direction Ascending
Off-nadir
[degree]
34.3
Baseline[m]
(Bperp)
-21
Range
(lat/lon)
30.75/31.95/
102.98/104.08

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