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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".

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Piton de La Fournaise Volcano (Reunion Island)

How to understand the SAR interferogram

No. Interferogram Specifications Comments Down
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1 Click image to enlarge Observation date 2006/06/23
2006/08/08

The crustal deformation caused by the volcanic activity appears in the southeast of the crater. The maximum Line-of-sight (LOS) displacement far from the satellite amounts to about 7 cm.

Observation Mode FBS/HH
FBS/HH
Orbital direction Ascending
Off-nadir
[degree]
41.5
Baseline[m]
(Bperp)
+1,179
Range
(lat/lon)
-21.30/-21.20/
55.67/55.78
2 Click image to enlarge Observation date 2006/10/05
2007/02/20

The phase disturbance caused by the water vapor in the atmosphere appears both in the east and west slope of the crater.


The crustal deformation caused by the volcanic activity appears in the southwest slope of the crater. The maximum Line-of-sight (LOS) displacement toward the satellite amounts to about 10 cm.

Observation Mode FBD/HH
FBD/HH
Orbital direction Ascending
Off-nadir
[degree]
38.8
Baseline[m]
(Bperp)
+1,188
Range
(lat/lon)
-21.30/-21.20/
55.67/55.78
3 Click image to enlarge Observation date 2007/03/21
2007/08/06

The obvious crustal deformation caused by the eruption in April 2007 appears.


See the contour map of deformation

Observation Mode FBS/HH
FBD/HH
Orbital direction Ascending
Off-nadir
[degree]
34.3
Baseline[m]
(Bperp)
-71
Range
(lat/lon)
-21.30/-21.20/
55.67/55.78

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