Earthquake off the east Coast of Aomori Prefecture on December 8, 2025: Crustal deformation detected by ALOS-2 and ALOS-4 data

Released: December 10, 2025, update: December 22, 2025
Japanese version of this page

2.5-Dimensional analysis

Quasi-vertical Displacement and Quasi-east-west Displacement [Link to GSI Maps]

　　　　　　　　Fig.1 Quasi-vertical Displacement and Quasi-east-west Displacement [Link to GSI Maps]

SAR Interferograms

Fig.2 SAR interferogram (1st: 2025-11-16, 2nd: 2025-12-14)

　　　　　　　　Fig.2 SAR interferogram (1st: 2025-11-16, 2nd: 2025-12-14)

Fig.3 SAR interferogram (1st: 2025-04-08, 2nd: 2025-12-10)

　　　　　　　　Fig.3 SAR interferogram (1st: 2025-04-08, 2nd: 2025-12-10)

Fig.4 SAR interferogram (1st: 2025-04-15, 2nd: 2025-12-09)

　　　　　　　　Fig.4 SAR interferogram (1st: 2025-04-15, 2nd: 2025-12-09)

Fig. # Date Flight Dir. Beam Dir. Obs. Mode *1 Incidence Angle Link to GSI Maps
2 2025-11-16
2025-12-14		 Des. Left U-U 38.1° 2025-11-16～2025-12-14SAR Interferograms
3 2025-04-08
2025-12-10		 Asc. Right U-U 43.0° 2025-04-08～2025-12-10SAR Interferograms
4 2025-04-15
2025-12-09		 Asc. Left U-U 39.8° 2025-04-15～2025-12-09SAR Interferograms
*1 U: Stripmap (Ultrafine)

Analysis by GSI from ALOS-2 and ALOS-4 data of JAXA.
These data were obtained based on the agreement with JAXA and through the activity of the SAR analysis working group for monitoring earthquake activity.
The numerical weather model was provided from JMA based on the agreement.

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