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Shunsuke Takemura
Earthquake Research Institute, the University of Tokyo
Corresponding Author
ORCiD: https://orcid.org/0000-0002-7511-3443
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We conducted centroid moment tensor (CMT) inversions of moderate (Mw 4.5–6.5) earthquakes in the Kanto region, Japan, using a local three-dimensional (3D) model. We then investigated the effects of our 3D CMT solutions on long-period ground motion simulations. Grid search CMT inversions were conducted using displacement seismograms for periods of 25–100 s. By comparing our 3D CMT solutions with those from the local one-dimensional (1D) catalog, we found that our 3D CMT inversion systematically provides magnitudes smaller than those in the 1D catalog. The Mw differences between 3D and 1D catalogs tend to be significant for earthquakes within the oceanic slab. By comparing ground motion simulations between 1D and 3D velocity models, we confirmed that observed Mw differences could be explained by differences in the rigidity structures around the source regions between 3D and 1D velocity models. The 3D velocity structures (especially oceanic crust and mantle) are important for estimating seismic moments in intraslab earthquakes, which are related to fault size estimation. A detailed discussion for intraslabe seismicity can be conducted by using the 3D CMT catalog. The seismic moments also directly affect the amplitudes of ground motions. The 3D CMT catalog allows us to directly conduct the precise forward and inverse modeling of long-period ground motion without adjusting source models, which have been typically applied in the cases using the 1D CMT catalog. We also conducted long-period ground motion simulations using our 3D CMT solutions to evaluate the reproducibility of long-period ground motions at stations within the Kanto Basin. The simulations of our 3D CMT solutions well-reproduced observed ground motions for periods longer than 10 s, even at stations within the Kanto Basin. The reproducibility of simulations was improved from those using solutions in the 1D catalog.
Keywords
CMT inversion, Kanto region, Long-period ground motion, 3D numerical simulation
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CURRENT STATUS: Published
View the published article at Earth, Planets and Space.
No community comments so far
Editorial decision: Accept
On 22 Dec, 2020
Editor assigned
On 09 Dec, 2020
Submission checks complete
On 09 Dec, 2020
Editor invited
On 09 Dec, 2020
Version 3
Posted 10 Dec, 2020
No comments provided
Review #1 received
Received 01 Dec, 2020
Reviewers invited
Invitations sent on 28 Nov, 2020
Reviewer #1 agreed
On 28 Nov, 2020
Editor assigned
On 26 Nov, 2020
Submission checks complete
On 26 Nov, 2020
Editor invited
On 26 Nov, 2020
No comments provided
Editorial decision: Minor Revision
On 23 Nov, 2020
Review #2 received
Received 14 Nov, 2020
Review #1 received
Received 10 Nov, 2020
Reviewers invited
Invitations sent on 23 Oct, 2020
Reviewer #1 agreed
On 23 Oct, 2020
Reviewer #2 agreed
On 23 Oct, 2020
Editor assigned
On 15 Oct, 2020
Submission checks complete
On 14 Oct, 2020
Editor invited
On 14 Oct, 2020
No comments provided
Editorial decision: Major Revision
On 11 Sep, 2020
Review #2 received
Received 01 Sep, 2020
Review #1 received
Received 22 Aug, 2020
Reviewer #2 agreed
On 02 Aug, 2020
Reviewers invited
Invitations sent on 24 Jul, 2020
Reviewer #1 agreed
On 24 Jul, 2020
Editor assigned
On 18 Jul, 2020
Editor invited
On 17 Jul, 2020
Submission checks complete
On 16 Jul, 2020
First submitted
On 14 Jul, 2020
Metrics
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PDF Downloads: ...
HTML Views: ...
Subject Areas
Plant Physiology and Morphology
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See the published version of this preprint at Earth, Planets and Space.
This is a preprint, 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
Shunsuke Takemura
Earthquake Research Institute, the University of Tokyo
Corresponding Author
ORCiD: https://orcid.org/0000-0002-7511-3443
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
View the published article at Earth, Planets and Space.
No community comments so far
Editorial decision: Accept
On 22 Dec, 2020
Editor assigned
On 09 Dec, 2020
Submission checks complete
On 09 Dec, 2020
Editor invited
On 09 Dec, 2020
Version 3
Posted 10 Dec, 2020
No comments provided
Review #1 received
Received 01 Dec, 2020
Reviewers invited
Invitations sent on 28 Nov, 2020
Reviewer #1 agreed
On 28 Nov, 2020
Editor assigned
On 26 Nov, 2020
Submission checks complete
On 26 Nov, 2020
Editor invited
On 26 Nov, 2020
No comments provided
Editorial decision: Minor Revision
On 23 Nov, 2020
Review #2 received
Received 14 Nov, 2020
Review #1 received
Received 10 Nov, 2020
Reviewers invited
Invitations sent on 23 Oct, 2020
Reviewer #1 agreed
On 23 Oct, 2020
Reviewer #2 agreed
On 23 Oct, 2020
Editor assigned
On 15 Oct, 2020
Submission checks complete
On 14 Oct, 2020
Editor invited
On 14 Oct, 2020
No comments provided
Editorial decision: Major Revision
On 11 Sep, 2020
Review #2 received
Received 01 Sep, 2020
Review #1 received
Received 22 Aug, 2020
Reviewer #2 agreed
On 02 Aug, 2020
Reviewers invited
Invitations sent on 24 Jul, 2020
Reviewer #1 agreed
On 24 Jul, 2020
Editor assigned
On 18 Jul, 2020
Editor invited
On 17 Jul, 2020
Submission checks complete
On 16 Jul, 2020
First submitted
On 14 Jul, 2020
Metrics
Comments: 0
PDF Downloads: ...
HTML Views: ...
Subject Areas
Plant Physiology and Morphology
License:
This work is licensed under a CC BY 4.0 License. Read Full License
View the published article at Earth, Planets and Space.
We conducted centroid moment tensor (CMT) inversions of moderate (Mw 4.5–6.5) earthquakes in the Kanto region, Japan, using a local three-dimensional (3D) model. We then investigated the effects of our 3D CMT solutions on long-period ground motion simulations. Grid search CMT inversions were conducted using displacement seismograms for periods of 25–100 s. By comparing our 3D CMT solutions with those from the local one-dimensional (1D) catalog, we found that our 3D CMT inversion systematically provides magnitudes smaller than those in the 1D catalog. The Mw differences between 3D and 1D catalogs tend to be significant for earthquakes within the oceanic slab. By comparing ground motion simulations between 1D and 3D velocity models, we confirmed that observed Mw differences could be explained by differences in the rigidity structures around the source regions between 3D and 1D velocity models. The 3D velocity structures (especially oceanic crust and mantle) are important for estimating seismic moments in intraslab earthquakes, which are related to fault size estimation. A detailed discussion for intraslabe seismicity can be conducted by using the 3D CMT catalog. The seismic moments also directly affect the amplitudes of ground motions. The 3D CMT catalog allows us to directly conduct the precise forward and inverse modeling of long-period ground motion without adjusting source models, which have been typically applied in the cases using the 1D CMT catalog. We also conducted long-period ground motion simulations using our 3D CMT solutions to evaluate the reproducibility of long-period ground motions at stations within the Kanto Basin. The simulations of our 3D CMT solutions well-reproduced observed ground motions for periods longer than 10 s, even at stations within the Kanto Basin. The reproducibility of simulations was improved from those using solutions in the 1D catalog.
Figure 1
Figure 2
Figure 3
Figure 4
Figure 5
Figure 6
Figure 7
Figure 8
Figure 9
Figure 10
Figure 11
Figure 12
This is a list of supplementary files associated with this preprint. Click to download.
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