The 2021 Nyiragongo Eruption, Democratic Republic of the Congo: Crustal deformation detected by ALOS-2 data
Crustal Deformation Observed by Synthetic Aperture Radar (SAR)
Volcanic unrest has been observed at the Nyiragongo volcano in Democratic Republic of the Congo since May 22, 2021 (UTC). To measure the crustal deformation caused by this unrest, we applied various analysis using ALOS-2/PALSAR-2 data.
SAR Interference Pair
*1 F: Stripmap (Fine)
* Figs. 1, 2 were drawn based on the decomposition analysis using Figs 3, 4.
(cf. ALOS-2 Project / PALSAR-2 (JAXA))
Fig. 1 Quasi-east-west Displacement[PNG: 0.95MB]
Fig. 2 Quasi-vertical Displacement[PNG: 0.95MB]
Fig. 3 Distribution of displacement in the line-of-sight direction between satellites and surface from 2020/03/06 to 2021/05/28. (Unwrap image) [PNG: 0.90MB]
Fig. 4 Distribution of displacement in the line-of-sight direction between satellites and surface from 2020/07/30 to 2021/06/03. (Unwrap image) [PNG: 1.06MB]
Fig. 5 SAR interferogram (2020/03/08-2021/05/28) [PNG: 1.39MB]
Fig. 6 SAR interferogram (2020/07/30-2021/06/03) [PNG: 1.73MB]
Fig. 7 RGB(*2) composite image (2020/03/08-2021/05/28) [PNG: 2.89MB]
Fig. 8 RGB(*2) composite image (2020/07/30-2021/06/03) [PNG: 1.84MB]
*2 R: HV polarization image of the first observation, G: HV polarization image of the second observation, B: HH polarization image of the second observation
Analysis by GSI from ALOS-2 data of JAXA.
These results were obtained through the activity of the SAR analysis working group of the Coordinating Committee for Prediction of Volcanic Eruption.
ALOS-2 (Advanced Land Observing Satellite 2) launched by Japan Aerospace Exploration Agency on May 24, 2014
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Geography and Crustal Dynamics Research Center
Crustal Deformation Research
MUNEKANE Hiroshi: Head of Division
Space Geodesy Research
KOBAYASHI Tomokazu: Head of Division