The 2016 New Zealand Earthquake: Crustal deformation detected by ALOS-2 data
Crustal Deformation Observed by Synthetic Aperture Radar (SAR)
Crustal Deformation revealed by SAR analysis
A large earthquake (Mw 7.8) occurred in New Zealand on November 13, 2016. We applied interferometric analysis and a Pixel Offset method using ALOS-2/PALSAR-2 data to measure the crustal deformation caused by the earthquake, and retrieved a dense three-dimensional deformation field. The results revealed that very complex movements on several faults occurred and the maximum uplift reached ~10 m.
The results obtained from the data are summarized as follows.
Results (InSAR and Pixel Offset)
*1 W: ScanSAR (Normal), F: Fine (10m)
(cf. ALOS-2 Project / PALSAR-2 (JAXA))
Analysis by GSI from ALOS-2 raw data of JAXA.
These results were obtained through the activity of the SAR analysis working group of the Coordinating Committee for Earthquake Prediction.
Area of interest
3D Displacement by Pixel Offset Results
Fig. 7. Three dimensional displacement field estimated from the results of Pixel Offset.
Geometry of 3D analysis by Pixel Offset
The 2016 New Zealand Earthquake
ALOS-2 (Advanced Land Observing Satellite 2) launched by Japan Aerospace Exploration Agency on May 24, 2014
Paper, Report, Presentation
Morishita, Y., T. Kobayashi, S. Fujiwara, and H. Yarai (2017), Complex crustal deformation of the 2016 Kaikoura, New Zealand, earthquake revealed by ALOS‐2, Bull. Seismol. Soc. Am., 107(6), 2676-2686, doi:10.1785/0120170143. [html]
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YARAI Hiroshi : Head of Division
MORISHITA Yu : Researcher