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Postseismic Deformation Following the 2016 Kumamoto Earthquake Detected by ALOS-2/PALSAR-2
Manabu Hashimoto
Corresponding Author
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View the published version at Earth, Planets and Space.
We have been conducting study of postseismic deformation following the 2016 Kumamoto earthquake using ALOS-2/PALSAR-2 acquired till 2018. We apply ionospheric correction to interferograms of ALOS-2/PALSAR-2. L-band SAR gives us high coherence enough to reveal surface deformation even in vegetated or mountainous area for pairs of images acquired more than 2 years. Ionospheric disturbances are seen both in the ascending and descending images, but spatial characteristics may be different each other. Postseismic deoformation following the Kumamoto earthquake is much larger than those observed after recent inland earthquakes in Japan with GPS, which exceeds 10 cm during two years at some spots in and around Kumamoto city and Aso caldera. There are sharp changes across several coseismic surface ruptures such as Futagawa, Hinagu and Idenokuchi faults. Time constant of postseismic decay ranges from 1 month to 600 days at selected points, but that LOS changes during the first epochs or two are dominant. This result suggests multiple source of postseismic deformation. LOS changes around the Hinagu and Suinzenji faults that appeared during the mainshock in Kumamoto City may be explained with right lateral afterslip on these faults. LOS changes around the Hinagu and Idenokuchi faults cannot be explained with right-lateral afterslip, which requires another unknown source. Deformation in northern part of Aso caldera may be the result of right lateral afterslip on unknown fault.
Keywords
Kumamoto earthquake, postseismic deformation, ALOS-2/PALSAR-2, ionospheric correction, InSAR
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CURRENT STATUS: Published
Published
On 20 Oct, 2020
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Editorial decision: Accept
On 29 Sep, 2020
Editor assigned
On 28 Sep, 2020
Submission checks complete
On 27 Sep, 2020
Editor invited
On 27 Sep, 2020
No comments provided
Review #2 received
Received 15 Sep, 2020
Editorial decision: Minor Revision
On 15 Sep, 2020
Reviewer #2 agreed
On 02 Sep, 2020
Review #1 received
Received 12 Aug, 2020
Reviewers invited
Invitations sent on 10 Aug, 2020
Reviewer #1 agreed
On 10 Aug, 2020
Editor assigned
On 27 Jul, 2020
Submission checks complete
On 26 Jul, 2020
Editor invited
On 26 Jul, 2020
Version 1
Posted 03 Apr, 2020
No comments provided
Editorial decision: Major Revision
On 13 May, 2020
Review #1 received
Received 11 May, 2020
Review #2 received
Received 15 Apr, 2020
Reviewer #2 agreed
On 11 Apr, 2020
Reviewer #1 agreed
On 05 Apr, 2020
Reviewers invited
Invitations sent on 03 Apr, 2020
Editor assigned
On 02 Apr, 2020
Submission checks complete
On 01 Apr, 2020
Editor invited
On 01 Apr, 2020
First submitted
On 31 Mar, 2020
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This preprint is under consideration at Earth, Planets and Space. A preprint is a preliminary version of a manuscript that has not completed peer review at a journal. Research Square does not conduct peer review prior to posting preprints. The posting of a preprint on this server should not be interpreted as an endorsement of its validity or suitability for dissemination as established information or for guiding clinical practice.
Learn more about In Review
Full paper
Postseismic Deformation Following the 2016 Kumamoto Earthquake Detected by ALOS-2/PALSAR-2
Manabu Hashimoto
Corresponding Author
Badges
Prescreen
This manuscript passed our Prescreen assessment
Complete author information
Appropriate declaration statements
Potential risks to human health
Prescreen
Peer Review Timeline
CURRENT STATUS: Published
Published
On 20 Oct, 2020
No community comments so far
Editorial decision: Accept
On 29 Sep, 2020
Editor assigned
On 28 Sep, 2020
Submission checks complete
On 27 Sep, 2020
Editor invited
On 27 Sep, 2020
No comments provided
Review #2 received
Received 15 Sep, 2020
Editorial decision: Minor Revision
On 15 Sep, 2020
Reviewer #2 agreed
On 02 Sep, 2020
Review #1 received
Received 12 Aug, 2020
Reviewers invited
Invitations sent on 10 Aug, 2020
Reviewer #1 agreed
On 10 Aug, 2020
Editor assigned
On 27 Jul, 2020
Submission checks complete
On 26 Jul, 2020
Editor invited
On 26 Jul, 2020
Version 1
Posted 03 Apr, 2020
No comments provided
Editorial decision: Major Revision
On 13 May, 2020
Review #1 received
Received 11 May, 2020
Review #2 received
Received 15 Apr, 2020
Reviewer #2 agreed
On 11 Apr, 2020
Reviewer #1 agreed
On 05 Apr, 2020
Reviewers invited
Invitations sent on 03 Apr, 2020
Editor assigned
On 02 Apr, 2020
Submission checks complete
On 01 Apr, 2020
Editor invited
On 01 Apr, 2020
First submitted
On 31 Mar, 2020
Metrics
Comments: 0
PDF Downloads: ...
HTML Views: ...
License:
This work is licensed under a CC BY 4.0 License. Read Full License
View the published version at Earth, Planets and Space.
We have been conducting study of postseismic deformation following the 2016 Kumamoto earthquake using ALOS-2/PALSAR-2 acquired till 2018. We apply ionospheric correction to interferograms of ALOS-2/PALSAR-2. L-band SAR gives us high coherence enough to reveal surface deformation even in vegetated or mountainous area for pairs of images acquired more than 2 years. Ionospheric disturbances are seen both in the ascending and descending images, but spatial characteristics may be different each other. Postseismic deoformation following the Kumamoto earthquake is much larger than those observed after recent inland earthquakes in Japan with GPS, which exceeds 10 cm during two years at some spots in and around Kumamoto city and Aso caldera. There are sharp changes across several coseismic surface ruptures such as Futagawa, Hinagu and Idenokuchi faults. Time constant of postseismic decay ranges from 1 month to 600 days at selected points, but that LOS changes during the first epochs or two are dominant. This result suggests multiple source of postseismic deformation. LOS changes around the Hinagu and Suinzenji faults that appeared during the mainshock in Kumamoto City may be explained with right lateral afterslip on these faults. LOS changes around the Hinagu and Idenokuchi faults cannot be explained with right-lateral afterslip, which requires another unknown source. Deformation in northern part of Aso caldera may be the result of right lateral afterslip on unknown fault.
Figure 1
Figure 2
Figure 3
Figure 4
Figure 5
Figure 6
Figure 7
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Figure 9
Figure 10
Figure 11
Figure 12