- using JERS-1 SAR -
Using the JERS-1 SAR interferometry, NASDA has successfully detected a surface deformation of the Mt. Iwate and its vicinity area that might be caused by the earthquake at Shizukuishi area of magnitude 6.1 on 16:58 (JST) of 3 September 1998 and the volcanic activity which has been observed during last spring to summer.
This image was derived from the interferometric analysis of the two SAR images, one image was acquired on 5 November 1997 and the other was acquired on 9 September 1998. Image size is 40 km for both south-north and east-west directions. The scale bar means that light green has no surface change, color change of green->yellow->red a change in approaching to the satellite, and green->blue->purple a change away from the satellite. One color cycle is the change in 11.7 cm. This figure shows two features.
1) maximum lift of 10 cm within a triangular area covering Mt. Iwate, Shizukuishi, and Hachimanndai.
2) At maximum, 48 cm of lift was confirmed at the west side of the fault.
Appendix-1 Surface deformation pattern
Appendix-2 SAR image of the Mt. Iwate and its vicinity area.
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Earth Observation Research Center
Last Update: 15 October 1998