Abstract
A distinguishing characteristic of deep earthquakes has been the absence of observable aftershock sequences1,2. Here we report the first extensive deep-earthquake aftershock sequence to be observed; it was recorded by an array of eight broadband seismographs following the 9 March 1994 deep Tonga earthquake. The aftershocks show a power-law decay with time following the main shock, as is typical of shallow events. Most of the well located aftershocks are concentrated along a steeply dipping plane consistent with one of the nodal planes of the main-shock mechanism and the mechanisms of three large aftershocks. Assuming these aftershocks denote the main-shock rupture area, they define a 50 × 65 km fault plane extending across the entire width of the active seismic zone and into the surrounding aseismic region. The width of the aftershock zone is wider than the expected width of the metastable olivine wedge, demonstrating that either the width of the metastable olivine material exceeds previous estimates, or the aftershocks are not confined in such a wedge.
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References
Leith, A. & Sharpe, J. A. J. Geol. 44, 877–917 (1936).
Frohlich, C. A. Rev. Earth planet. Sci. 17, 227–254 (1989).
Pavlis, G. L. & Hamburger, M. W. J. geophys. Res. 96, 18107–18117 (1991).
Kisslinger, C. & Hasegawa, A. Tectonophysics 197, 27–40 (1991).
Green, H. W. & Burnley, P. C. Nature 341, 733–737 (1989).
Kirby, S. H., Durham, W. B. & Stern, L. A. Science 252, 216–225 (1991).
Willemann, R. J. & Frohlich, C. J. geophys. Res. 92, 13927–13943 (1987).
Myers, S. C. et al. Geophys. Res. Lett., (in the press).
Omori, F. J. Coll. Sci. Imp. Univ. Tokyo 7, 111–200 (1895).
Kisslinger, C. & Jones, L. M. J. geophys. Res. 96, 11947–11958 (1991).
Davis, S. D. & Frohlich, C. J. Geophys. Res. 96, 6335–6350 (1991).
Utsu, T. Geophys. Mag. 30, 521–605 (1961).
Ogata, Y. J. Phys. Earth 31, 115–124 (1983).
Jordan, T. H. & Sverdrup, K. A. Bull. seism. Soc. Am. 71, 1105–1130 (1981).
Wiens, D. A., McGuire, J. J. & Shore, P. J. Nature 364, 790–793 (1993).
Fuchs, K. & Muller, G. Geophys. J. R. astr. Soc. 23, 417–433 (1971).
Kennett, B. L. N. Seismic Wave Propagation in Stratified Media (Cambridge Univ. Press, 1983).
McGuire, J. J. et al., (abstr.) EOS 75, 466 (1994).
Wyss, M. & Molnar, P. Phys. Earth planet. Inter. 6, 279–292 (1972).
Houston, H. & Williams, Q. Nature 352, 520–522 (1991).
Sung, C. & Burns, R. G. Tectonophysics 31, 1–32 (1976).
Iidaka, T. & Suetsugu, D. Nature 356, 593–595 (1992).
Rubie, D. C. & Ross, C. R. Phys. Earth planet Inter. (in the press).
Kirby, S. H. J. geophys. Res. 92, 13789–13800 (1987).
Green, H. W., Young T. E., Walker, D. & Scholz, C. H. Nature 348, 720–722 (1990).
Iidaka, T. & Furukawa, Y. Science 263, 1116–1118 (1994).
Stein, S., Kirby, S. H., Rubie, D. & Okal, E. A. paper presented at the SUBCON conference, Avalon, California, 13–17 June 1994.
Toksoz, M. N., Sleep, N. H. & Smith, A. T. Geophys. J. R. astr. Soc. 35, 285–310 (1973).
Abe, K. J. Phys. Earth 30, 321–330 (1982).
Dziewonski, A. M., Chou, T. & Woodhouse, J. H. J. geophys. Res. 86, 2825–2852 (1981).
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Wiens, D., McGuire, J., Shore, P. et al. A deep earthquake aftershock sequence and implications for the rupture mechanism of deep earthquakes. Nature 372, 540–543 (1994). https://doi.org/10.1038/372540a0
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DOI: https://doi.org/10.1038/372540a0
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