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Repeated drainage from megathrusts during episodic slow slip

Nature Geosciencevolume 11pages351356 (2018) | Download Citation

Abstract

Pore-fluid pressure levels are considered to regulate the frictional strength and slip behaviour at megathrusts, where the largest earthquakes on Earth occur. Some analyses have suggested that the breaking of permeability seals during megathrust earthquakes causes subsequent drainage from the megathrust. However, it is poorly understood whether drainage follows frequent occurrences of episodic slow slip events. Here we analyse seismic waveform data beneath Kanto, Japan, for the period from 2004 to 2015 and show that seismicity rates and seismic attenuation above the megathrust of the Philippine Sea slab change cyclically in response to accelerated slow slip. These observations are interpreted to represent intensive drainage during slow slip events that repeat at intervals of approximately one year and subsequent migration of fluids into the permeable overlying plate. Our observations suggest that if slow slip events occur under an impermeable overlying plate, fluids draining due to slow slip events could be forced to channel within the megathrust, potentially enhancing pore-fluid pressure at an up-dip, locked seismogenic megathrust. This process might increase the potential to trigger large earthquakes near slow slip areas. Although stress transfer is recognized as an important factor for triggering megathrust failure, fluid transfer accompanied by episodic slow slip events will thus play an additional and crucial part in megathrust weakening.

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References

  1. 1.

    Lay, T., Kanamori, H. & Ruff, L. J. The asperity model and the nature of large subduction zone earthquakes. Earthq. Predict. Res. 1, 3–71 (1982).

  2. 2.

    Obara, K., Hirose, H., Yamamizu, F. & Kasahara, K. Episodic slow slip events accompanied by non-volcanic tremors in southwest Japan subduction zone. Geophys. Res. Lett. 31, L23602 (2004).

  3. 3.

    Rogers, G. & Dragert, H. Episodic tremor and slip on the Cascadia subduction zone: the chatter of silent slip. Science 300, 1942–1943 (2003).

  4. 4.

    Wallace, L. M. & Eberhart-Phillips, D. Newly observed, deep slow slip events at the central Hikurangi margin, New Zealand: implications for downdip variability of slow slip and tremor, and relationship to seismic structure. Geophys. Res. Lett. 40, 5393–5398 (2013).

  5. 5.

    Peng, Z. & Gomberg, J. An integrated perspective of the continuum between earthquakes and slow-slip phenomena. Nat. Geosci. 3, 599–607 (2010).

  6. 6.

    Obara, K. & Kato, A. Connecting slowearthquakes to huge earthquakes. Science 353, 253–257 (2016).

  7. 7.

    Kato, A. et al. Propagation of slow slip leading up to the 2011 M w 9.0 Tohoku-Oki earthquake. Science 335, 705–708 (2012).

  8. 8.

    Uchida, N., Iinuma, T., Nadeau, R. M., Bürgmann, R. & Hino, R. Periodic slow slip triggers megathrust zone earthquakes in northeastern Japan. Science 351, 488–492 (2016).

  9. 9.

    Husen, S. & Kissling, E. Postseismic fluid flow after the large subduction earthquake of Antofagasta, Chile. Geology 29, 847–850 (2002).

  10. 10.

    Nakajima, J., Yoshida, K. & Hasegawa, A. An intraslab seismic sequence activated by the 2011 Tohoku-oki earthquake: evidence for fluid-related embrittlement. J. Geophys. Res. Solid Earth 118, 3492–3505 (2013).

  11. 11.

    Nippress, S. E. J. & Rietbrock, A. Seismogenic zone high permeability in the Central Andes inferred from relocations of micro-earthquakes. Earth Planet. Sci. Lett. 263, 235–245 (2007).

  12. 12.

    Sibson, R. H. Stress switching in subduction forearcs: implications for overpressure containment and strength cycling on megathrusts. Tectonophysics 600, 142–152 (2013).

  13. 13.

    Sano, Y. et al. Helium anomalies suggest a fluid pathway from mantle to trench during the 2011 Tohoku-Oki earthquake. Nat. Commun. 5, 3084 (2014).

  14. 14.

    Seno, T. Determination of the pore fluid pressure ratio at seismogenic megathrusts in subduction zones: implications for strength of asperities and Andean-type mountain building. J. Geophys. Res. 114, B05405 (2009).

  15. 15.

    Kitajima, H. & Saffer, D. M. Elevated pore pressure and anomalously low stress in regions of low frequency earthquakes along the Nankai Trough subduction megathrust. Geophys. Res. Lett. 39, L23301 (2012).

  16. 16.

    Uchida, N., Asano, Y. & Hasegawa, A. Acceleration of regional plate subduction beneath Kanto, Japan, after the 2011 Tohoku-oki earthquake. Geophys. Res. Lett. 43, 9002–9008 (2016).

  17. 17.

    Waldhauser, F. & Ellsworth, W. L. A double-difference earthquake location algorithm: method and application to the Northern Hayward Fault, California. Bull. Seismol. Soc. Am. 90, 1353–1368 (2000).

  18. 18.

    Ueno, H., Hatakeyama, S., Aketagawa, T., Funasaki, J. & Hamada, N. Improvement of hypocenter determination procedures in the Japan Meteorological Agency (in Japanese with English abstract). Q. J. Seismol. 65, 123–134 (2002).

  19. 19.

    Nakajima, J., Hirose, F. & Hasegawa, A. Seismotectonics beneath the Tokyo metropolitan area, Japan: effect of slab-slab contact and overlap on seismicity. J. Geophys. Res. 114, B08309 (2009).

  20. 20.

    Toda, S., Stein, R. S. & Lin, J. Widespread seismicity excitation throughout central Japan following the 2011 M = 9.0 Tohoku earthquake and its interpretation by Coulomb stress transfer. Geophys. Res. Lett. 38, L00G03 (2011).

  21. 21.

    Sakai, S. & Hirata, N. Distribution of the Metropolitan Seismic Observation network (in Japanese with English abstract). Bull. Earthq. Res. Inst. Tokyo Univ. 84, 57–69 (2009).

  22. 22.

    Farla, R. J. M., Jackson, I., Fitz Gerald, J. D., Faul, U. H. & Zimmerman, M. E. Dislocation damping and anisotropic seismic wave attenuation in Earth’s upper mantle. Science 336, 332–335 (2012).

  23. 23.

    Hyndman, R. D., Yamano, M. & Oleskevich, D. A. The seismogenic zone of subduction thrust faults. Island Arc 6, 244–260 (1997).

  24. 24.

    Gurevich, B., Makarynska, D., de Paula, O. B. & Pervukhina, M. A simple model for squirt-flow dispersion and attenuation in fluid-saturated granular rocks. Geophysics 75, N109–N120 (2010).

  25. 25.

    Müller, T. M., Gurevich, B. & Lebedev, M. Seismic wave attenuation and dispersion resulting from wave-induced flow in porous rocks—a review. Geophysics 75, 75A147–75A164 (2010).

  26. 26.

    Hyndman, R. D. & Peacock, S. M. Serpentinization of the forearc mantle. Earth Planet. Sci. Lett. 212, 417–432 (2003).

  27. 27.

    Chen, K. H., Nadeau, R. M. & Rau, R. J. Towards a universal rule on the recurrence interval scaling of repeating earthquakes? Geophys. Res. Lett. 34, L16308 (2007).

  28. 28.

    Nakajima, J. & Hasegawa, A. Tremor activity inhibited by well-drained conditions above a megathrust. Nat. Commun. 7, 13863 (2016).

  29. 29.

    Boyarko, D. C. & Brudzinski, M. R. Spatial and temporal patterns of nonvolcanic tremor along the southern Cascadia subduction zone. J. Geophys. Res. 115, B00A22 (2010).

  30. 30.

    Townend, J. & Zoback, M. D. How faulting keeps the crust strong. Geology 28, 399–402 (2000).

  31. 31.

    Koerner, A., Kissling, E. & Miller, S. A. A model of deep crustal fluid flow following the Mw = 8.0 Antofagasta, Chile, earthquake. J. Geophys. Res. 109, B06307 (2004).

  32. 32.

    Yoshida, K. et al. Stress before and after the 2011 great Tohoku-oki earthquake and induced earthquakes in inland areas of eastern Japan. Geophys. Res. Lett. 39, L03302 (2012).

  33. 33.

    Wells, R. E., Blakely, R. J., Wech, A. G., McCrory, P. A. & Michael, A. Cascadia subduction tremor muted by crustal faults. Geology 45, 515–518 (2017).

  34. 34.

    Segall, P. & Bradley, A. M. Slow-slip evolves into megathrust earthquakes in 2D numerical simulations. Geophys. Res. Lett. 39, L18308 (2012).

  35. 35.

    Gibbs, J., Healy, J., Raleigh, C. & Coakley, J. Seismicity in the Rangely, Colorado, area: 1962–1970. Bull. Seismol. Soc. Am. 63, 1557–1570 (1973).

  36. 36.

    Kim, W. Y. Induced seismicity associated with fluid injection into a deep well in Youngstown, Ohio. J. Geophys. Res. Solid Earth 118, 3506–3518 (2013).

  37. 37.

    Rivet, D. et al. Seismic velocity changes associated with aseismic deformations of a fault stimulated by fluid injection. Geophys. Res. Lett. 43, 9563–9572 (2016).

  38. 38.

    Nadeau, R. M. & Johnson, L. R. Seismological studies at Parkfield VI: moment release rates and estimates of source parameters for small repeating earthquakes. Bull. Seismol. Soc. Am. 88, 790–814 (1998).

  39. 39.

    Uchida, N. & Matsuzawa, T. Pre- and postseismic slow slip surrounding the 2011 Tohoku-oki earthquake rupture. Earth Planet. Sci. Lett. 374, 81–91 (2013).

  40. 40.

    Press, W. H. et al. Numerical Recipes in Fortran 77. The Art of Scientific Computing (Cambridge Univ. Press, New York, NY, 1992).

  41. 41.

    Scherbaum, F. Combined inversion for the three-dimensional Q structure and source parameters using microearthquake spectra. J. Geophys. Res. 95, 12423 (1990).

  42. 42.

    Brune, J. N. Tectonic stress and the spectra of seismic shear waves from earthquakes. J. Geophys. Res. 75, 4997 (1970).

  43. 43.

    Nakajima, J. et al. Seismic attenuation beneath northeastern Japan: constraints on mantle dynamics and arc magmatism. J. Geophys. Res. Solid Earth 118, 5838–5855 (2013).

  44. 44.

    Eshelby, J. D. The determination of the elastic field of an ellipsoidal inclusion, and related problems. Proc. R. Soc. Lond. Ser. A 241, 376–396 (1957).

  45. 45.

    Sato, T. & Hirasawa, T. Body wave spectra from propagating shear cracks. J. Phys. Earth 21, 415–431 (1973).

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Acknowledgements

We used the hypocentre catalogue unified by the Japan Meteorological Agency and waveform data recorded at MeSO-net stations. S. Sakai and Y. Asano provided us with the MeSO-net waveform data. We thank A. Hasegawa and Y. Takei for discussions. This study was supported by the Earthquake Research Institute cooperative research programme (2017-D-21) and JSPS KAKENHI (grant numbers JP15K05260, JP16H04040, JP16H06475, JP16H06473, JP17K05626 and JP17H05309).

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Affiliations

  1. Department of Earth and Planetary Sciences, School of Science, Tokyo Institute of Technology, Tokyo, Japan

    • Junichi Nakajima
  2. Research Center for Prediction of Earthquakes and Volcanic Eruptions, Graduate School of Science, Tohoku University, Sendai, Japan

    • Naoki Uchida

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Contributions

J.N. performed the waveform analysis, and N.U. estimated the slip rates of the megathrust using small repeating earthquakes. Both J.N. and N.U. designed this study and contributed to the interpretation of the data and preparation of the manuscript.

Competing interests

The authors declare no competing interests.

Corresponding author

Correspondence to Junichi Nakajima.

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https://doi.org/10.1038/s41561-018-0090-z