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Volume 60 Supplement 10

Special Issue: Special Section for the 2007 Noto Hanto Earthquake (2)

Coulomb stresses imparted by the 25 March 2007 Mw=6.6 Noto-Hanto, Japan, earthquake explain its ‘butterfly’ distribution of aftershocks and suggest a heightened seismic hazard

Abstract

The well-recorded aftershocks and well-determined source model of the Noto Hanto earthquake provide an excellent opportunity to examine earthquake triggering associated with a blind thrust event. The aftershock zone rapidly expanded into a ‘butterfly pattern’ predicted by static Coulomb stress transfer associated with thrust faulting. We found that abundant aftershocks occurred where the static Coulomb stress increased by more than 0.5 bars, while few shocks occurred in the stress shadow calculated to extend northwest and southeast of the Noto Hanto rupture. To explore the three-dimensional distribution of the observed aftershocks and the calculated stress imparted by the mainshock, we further resolved Coulomb stress changes on the nodal planes of all aftershocks for which focal mechanisms are available. About 75% of the possible faults associated with the moderate-sized aftershocks were calculated to have been brought closer to failure by the mainshock, with the correlation best for low apparent fault friction. Our interpretation is that most of the aftershocks struck on the steeply dipping source fault and on a conjugate northwest-dipping reverse fault contiguous with the source fault. Since we found that the Coulomb hypothesis works well for the Noto Hanto sequence, we subsequently computed stress changes on the nearby active faults. Although the calculated stress changes were found to be negligible on the major faults south of the Noto Peninsula, several short active faults near the epicentral area were calculated to have been brought several bars closer to failure. Thus, the probability of strong shaking in and around the epicentral area may still be high due to the transfer of stress to the adjacent faults by a short blind thrust fault.

References

  • Awata, Y., S. Toda, H. Kaneda, T. Azuma, H. Horiawa, M. Shishikura, and T. Echigo, Crustal deformation due to the Noto Hanto earthquake in 2007 estimated from the pre-earthquake sea level, abstract for Japan Geoscience Union Meeting 2007, http://earth2007.jtbcom.co.jp/session/pdf/Z255/Z255-P022_e.pdf, 2007.

    Google Scholar 

  • Cocco, M. and J. R. Rice, Pore pressure and poroelasticity effects in Coulomb stress analysis of earthquake interactions, J. Geophys. Res., 107(B2), 2030, doi:10.1029/2002JB001779, 2003.

    Article  Google Scholar 

  • Dieterich, J., A constitutive law for rate of earthquake production and its application to earthquake clustering, J. Geophys. Res., 99, 2601–2618, 1994.

    Article  Google Scholar 

  • Freed, A. M., Earthquake triggering by static, dynamic, and postseis-mic stress transfer, Annu. Rev. Earth Planet. Sci., 33, 335–367, doi: 10.1146/annurev.earth.33.092203.122505, 2005.

    Article  Google Scholar 

  • Geographical Survey Instutite (GSI), The fault of the Noto Hanto Earthquake in 2007, http://cais.gsi.go.jp/Research/crust/notohanto/fault_model.html, 2007.

    Google Scholar 

  • Headquarters for Earthquake Research Promotion, Report: ‘National Seismic Hazard Maps for Japan (2005)’, original version in Japanese, pp. 121, 2005 (translation version released in 2006 is on http://www.jishin.go.jp/main/index-e.html).

    Google Scholar 

  • Horikawa, H., Characterization of the 2007 Noto Hanto, Japan, earthquake, Earth Planets Space, 60, this issue, 1017–1022, 2008.

    Article  Google Scholar 

  • Imanishi, K., Y. Kuwahara, and Y. Haryu, Off-fault aftershocks of the 2005 west off Fukuoka Prefecture earthquake: Reactivation of a structural boundary?, Earth Planets Space, 58, 81–86, 2006.

    Article  Google Scholar 

  • Japan Meteorological Agency (JMA), CMT solution of the March 25, 2007 Noto Hanto earthquake, http://www.seisvol.kishou.go.jp/eq/mech/cmt/fig/cmt20070325094157.html, 2007.

    Google Scholar 

  • Katagawa, H., M. Hamada, S. Yoshida, H. Kadosawa, A. Mitsuhashi, Y. Kono, and Y. Kinugasa, J. Geograph., 114, 791–810, 2005 (in Japanese with English abstract).

    Article  Google Scholar 

  • Kato, A., E. Kurashimo, N. Hirata, S. Sakai, T. Iwasaki, and T. Kanazawa, Imaging the source region of the 2004 mid-Niigata prefecture earthquake and the evolution of a seismogenic thrust-related fold, Geophys. Res. Lett., 32, J07307, doi:10.1029/2005GL022366, 2005.

    Article  Google Scholar 

  • King, G. C. P., R. S. Stein, and J. Lin, Static stress changes and the triggering of earthquakes, Bull. Seismol. Soc. Am., 84, 935–953, 1994.

    Google Scholar 

  • Lin, J. and R. S. Stein, Stress triggering in thrust and subduction earthquakes and stress interaction between the southern San Andreas and nearby thrust and strike-slip faults, J. Geophys. Res., 109, B02303, doi:10.1029/2003JB002607, 2004.

    Google Scholar 

  • McCloskey, J., S. S. Nalbant, S. Steacy, C. Nostro, O. Scotti, and D. Bau-mont, Structural constraints on the spatial distribution of aftershocks, Geophys. Res. Lett., 30(12), 1610, doi:10.1029/2003GL017225, 2003.

    Article  Google Scholar 

  • NIED, Earthquake Mechanism Search in F-net Broadband Seismograph Network data, http://www.fnet.bosai.go.jp/freesia/event/search/search.html, 2007.

    Google Scholar 

  • Ogata, Y., Statistical models for earthquake occurrences and residual analysis for point processes, J. Am. Stat. Assoc., 83, 9–27, 1988.

    Article  Google Scholar 

  • Okada, Y., Internal deformation due to shear and tensile faults in a halfspace, Bull. Seismol. Soc. Am., 82, 1018–1040, 1992.

    Google Scholar 

  • Okamura, Y., Explanatory notes of geological map west of Noto Peninsula 1:200,000, Marine Geology Map series, 61 (CD), Geological Survey of Japan, AIST, 2003.

    Google Scholar 

  • Ota, Y., Late Quaternary vertical movement in Japan estimated from deformed shorelines, The Royal Society of New Zealand Bull., 13, 231–239, 1975.

    Google Scholar 

  • Ota, Y., T. Matsuda, and J. Hirakawa, Active faults in Noto Peninsula, central Japan, Quat. Res., 15, 109–128, 1976 (in Japanese with English abstract).

    Article  Google Scholar 

  • Parsons, T., S. Toda, R. S. Stein, A. Barka, and J. H. Dieterich, Heightened odds of large earthquakes near Istanbul: An interaction-based probability calculation, Science, 288, 661–665, 2000.

    Article  Google Scholar 

  • Research Group for Active Faults in Japan, Active Faults in Japan, sheet maps and inventories, rev. ed., 437 pp., University of Tokyo Press, Tokyo, 1991.

    Google Scholar 

  • Sibson, R. H., Rupture nucleation on unfavorably faults, Bull. Seismol. Soc. Am., 80, 1580–1604, 1990.

    Google Scholar 

  • Steacy, S., J. Gomberg, and M. Cocco, Introduction to special section: Stress transfer, earthquake triggering, and time-dependent seismic hazard, J. Geophys. Res., 110, B05S01, doi:10.1029/2005JB003692, 2005.

    Google Scholar 

  • Stein, R. S., The role of stress transfer in earthquake occurrence, Nature, 402, 605–609, 1999.

    Article  Google Scholar 

  • Stein, R. S., A. A. Barka, and J. H. Dieterich, Progressive failure on the northern Anatolian fault since 1939 by earthquake stress triggering, Geophys. J. Int., 128, 594–704, 1997.

    Article  Google Scholar 

  • Toda, S. and R. S. Stein, Toggling of seismicity by the 1997 Kagoshima earthquake couplet: A demonstration of time-dependent stress transfer, J. Geophys. Res., 108(B12), 2567, doi: 10.1029/2003JB002527, 2003.

    Article  Google Scholar 

  • Toda, S., R. S. Stein, K. Richards-Dinger, and S. Bozkurt, Forecasting the evolution of seismicity in southern California: Animations built on earthquake stress transfer, J. Geophys. Res., 110, B05S19, doi:10.1029/2004JB003389, 2005.

    Google Scholar 

  • USGS, USGS Fast Moment Tensor Solution, Magnitude 6.7—Near the West Coast of Honshu, Japan, http://neic.usgs.gov/neis/eq_depot/2007/eq_070325_aiae/neic_aiae_q.html2007, 2007.

    Google Scholar 

  • Yagi, Y., http://www.geo.tsukuba.ac.jp/press_HP/yagi/EQ/20070325/, 2007.

  • Yamanaka, Y., EIC Seismological Note: No. 185, 07/03/25 09:42(JCT) Near the west coast of Honshu, http://www.eri.u-tokyo.ac.jp/sanchu/Seismo_Note/2007/EIC185e.html, 2007.

    Google Scholar 

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Correspondence to Shinji Toda.

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Toda, S. Coulomb stresses imparted by the 25 March 2007 Mw=6.6 Noto-Hanto, Japan, earthquake explain its ‘butterfly’ distribution of aftershocks and suggest a heightened seismic hazard. Earth Planet Sp 60, 1041–1046 (2008). https://doi.org/10.1186/BF03352866

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Key words

  • 2007 Noto Hanto earthquake
  • Coulomb stress change
  • aftershocks
  • off-fault aftershocks
  • blind thrust