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Rina Suzuki
Nagoya University
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We analyzed the temporal variation in the travel times of both the P and S waves (Vp and Vs) for 14 months at Toyohashi (central Japan) with a continuously operating vibration source that could produce both P and S waves efficiently. The seismic waves produced by the source, which is named ACROSS (accurately-controlled routinely-operated signal system), were recorded by three nearby seismic stations, and the travel time variation at each station was calculated using the transfer function calculated from the recorded data. We observed the seasonal variations in the Vp and Vs for all the stations—which can be interpreted using the change in the fluid saturation and crack density of subsurface rocks—are consistent with the variation in the ground water level. The short-term responses to rainfall are observed at the nearest station; the interpretation of the changes in crack density and saturation is inconsistent with the ground water observation partly due the initial response to rainfall. This can be interpreted as an air-water mixture within pores or cracks on a fine scale.
Keywords
Seismic velocity change, artificial seismic source, ACROSS, fluid saturation, ground water level
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Peer Review Timeline
CURRENT STATUS: Published
View the published article at Earth, Planets and Space.
Version 1
Posted 30 Dec, 2020
No community comments so far
Editorial decision: Major Revision
On 01 Mar, 2021
Review #2 received
Received 25 Feb, 2021
Review #1 received
Received 11 Feb, 2021
Reviewer #2 agreed
On 24 Jan, 2021
Reviewer #1 agreed
On 10 Jan, 2021
Reviewers invited
Invitations sent on 05 Jan, 2021
Editor assigned
On 23 Dec, 2020
Submission checks complete
On 23 Dec, 2020
Editor invited
On 23 Dec, 2020
First submitted
On 22 Dec, 2020
Metrics
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PDF Downloads: ...
HTML Views: ...
Subject Areas
Space Exploration
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A new preprint design is coming!
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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
Rina Suzuki
Nagoya University
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
View the published article at Earth, Planets and Space.
Version 1
Posted 30 Dec, 2020
No community comments so far
Editorial decision: Major Revision
On 01 Mar, 2021
Review #2 received
Received 25 Feb, 2021
Review #1 received
Received 11 Feb, 2021
Reviewer #2 agreed
On 24 Jan, 2021
Reviewer #1 agreed
On 10 Jan, 2021
Reviewers invited
Invitations sent on 05 Jan, 2021
Editor assigned
On 23 Dec, 2020
Submission checks complete
On 23 Dec, 2020
Editor invited
On 23 Dec, 2020
First submitted
On 22 Dec, 2020
Metrics
Comments: 0
PDF Downloads: ...
HTML Views: ...
Subject Areas
Space Exploration
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 analyzed the temporal variation in the travel times of both the P and S waves (Vp and Vs) for 14 months at Toyohashi (central Japan) with a continuously operating vibration source that could produce both P and S waves efficiently. The seismic waves produced by the source, which is named ACROSS (accurately-controlled routinely-operated signal system), were recorded by three nearby seismic stations, and the travel time variation at each station was calculated using the transfer function calculated from the recorded data. We observed the seasonal variations in the Vp and Vs for all the stations—which can be interpreted using the change in the fluid saturation and crack density of subsurface rocks—are consistent with the variation in the ground water level. The short-term responses to rainfall are observed at the nearest station; the interpretation of the changes in crack density and saturation is inconsistent with the ground water observation partly due the initial response to rainfall. This can be interpreted as an air-water mixture within pores or cracks on a fine scale.
Figure 1
Figure 2
Figure 3
Figure 4
Figure 5
Figure 6
This is a list of supplementary files associated with this preprint. Click to download.
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