CORRECTION article

Front. Earth Sci., 30 September 2021

Sec. Solid Earth Geophysics

Volume 9 - 2021 | https://doi.org/10.3389/feart.2021.770719

Corrigendum: Precise Monitoring of Pore Pressure at Boreholes Around Nankai Trough Toward Early Detecting Crustal Deformation

  • 1. Japan Agency for Marine-Earth Science and Technology, Yokohama, Japan

  • 2. United States Geological Survey, Seattle, WA, United States

  • 3. University of Washington, Seattle, WA, United States

  • 4. National Research Institute for Earth Science and Disaster Resilience, Tsukuba, Japan

In the original article, there were mistakes in Figure 1B and Figure 13. In these figures, there were wrong focal mechanisms of VLFE, which contradicted with those in Figure 1A. The corrected Figure 1B and Figure 13 appear below.

FIGURE 1

). Squares represent borehole stations. Labeled names (D-16, D-13, and C-11) are the nearby DONET stations for C0002 (blue), C0010 (red), and C0006 (yellow), respectively. Focal mechanism is obtained from . (B) Seismic section showing the location of the boreholes C0002 (937–980 mbsf), C0010 (610 mbsf), and C0006 (453.5 mbsf), where mbsf = meter below seafloor; VE = vertical exaggeration. The average source location errors of sVLFEs are 5 and 2 km for horizontal and vertical component, respectively (). Spatial resolution of focal depth and fixed dip angle for the SSE is 1 km and 6°, respectively (). The focal depths of the fault models A-1 and A-2+ are assumed to be consistent with VLFE because it is practically difficult to determine the focal depth precisely from only the two volumetric strain data at boreholes (C0002 and C0010) by using the simplified green’s function. (C) Borehole completion diagram at C0006. The solid magenta ellipses indicate the pressure gauges, where the top one (Pc0) is a hydrostatic reference pressure sensor used to remove oceanographic signals, BRT = below rotary table, and MSL = mean sea level. Figures (B,C) are modified after Figure 1 of Araki et al. (2017) and Figure 2 of , respectively.

FIGURE 13

. Double arrows represent volumetric strain change due to crustal deformation driven by the SSE.

As an additional explanation for Figure 1B, “the focal depths of the fault models A-1 and A-2+ are assumed to be consistent with VLFE because it is practically difficult to determine the focal depth precisely from only the two volumetric strain data at boreholes (C0002 and C0010) by using the simplified green’s function.”

The authors apologize for these errors and state that they do not change the scientific conclusions of the article in any way. The original article has been updated.

Statements

Publisher’s note

All claims expressed in this article are solely those of the authors and do not necessarily represent those of their affiliated organizations, or those of the publisher, the editors and the reviewers. Any product that may be evaluated in this article, or claim that may be made by its manufacturer, is not guaranteed or endorsed by the publisher.

References

  • 1

    AriyoshiK.IinumaT.NakanoM.KimuraT.ArakiE.MachidaY.et al (2021). Characteristics of Slow Slip Event in March 2020 Revealed from Borehole and DONET Observatories. Front. Earth Sci.8, 600793. 10.3389/feart.2020.600793

  • 2

    NakanoM.HoriT.ArakiE.KodairaS.IdeS. (2018). Shallow Very-Low-Frequency Earthquakes Accompany Slow Slip Events in the Nankai Subduction Zone. Nat. Commun.9, 984. 10.1038/s41467-018-03431-5

  • 3

    KinoshitaM.BeckerK.ToczkoS.EdgingtonJ.KimuraT.MachidaY.et al (2018). “Expedition 380 Methods,” in The Expedition 380 Scientists, NanTroSEIZE Stage 3: Frontal Thrust Long-Term Borehole Monitoring System (LTBMS). Proceedings of the International Ocean Discovery Program. Editors BeckerK.KinoshitaM.ToczkoS. (College Station, TX: International Ocean Discovery Program), 380. 10.14379/iodp.proc.380.102.2018

Summary

Keywords

slow slip event, slow earthquake, kuroshio meander, nankai trough, ocean modeling

Citation

Ariyoshi K, Kimura T, Miyazawa Y, Varlamov S, Iinuma T, Nagano A, Gomberg J, Araki E, Miyama T, Sueki K, Yada S, Hori T, Takahashi N and Kodaira S (2021) Corrigendum: Precise Monitoring of Pore Pressure at Boreholes Around Nankai Trough Toward Early Detecting Crustal Deformation. Front. Earth Sci. 9:770719. doi: 10.3389/feart.2021.770719

Received

04 September 2021

Accepted

16 September 2021

Published

30 September 2021

Volume

9 - 2021

Edited and reviewed by

Sergey V. Samsonov, Department of Natural Resources, Canada

Updates

Copyright

*Correspondence: Keisuke Ariyoshi,

This article was submitted to Solid Earth Geophysics, a section of the journal Frontiers in Earth Science

Disclaimer

All claims expressed in this article are solely those of the authors and do not necessarily represent those of their affiliated organizations, or those of the publisher, the editors and the reviewers. Any product that may be evaluated in this article or claim that may be made by its manufacturer is not guaranteed or endorsed by the publisher.

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