Abstract
The source parameters of the May 26, 1983, earthquake off the coast of Akita prefecture (02h59m59.6sUT, 40.462°N, 139.102°E, 24 km, m b = 6.8, M S = 7.7) determined from long-period surface waves are:
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1st nodal plane; dip = 30° (E21°S), slip angle = 115°;
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2nd nodal plane; dip = 63° (W7°S), slip angle = 76°;
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Seismic moment = 5.9 × 1027 dyne cm (M W = 7.8).
This mechanism is consistent with a plate model, recently suggested by several investigators, that places the boundary between the Eurasian and North American plates along the Japan Sea Coast of Honshu Island, Japan. Within the framework of this model, Honshu, Hokkaido and Sakhalin reside on the North American plate, and the Akita-Oki event represents subduction of the Eurasian plate beneath the North American Plate. The convergence rate V between the North American and Eurasia plates is 1.1 cm/year along the Japan Sea Coast of Honshu and the age T of the plate being subducted is estimated to be about 20 M years. For these values of V and T, a previously determined empirical relation between earthquake magnitude, convergence rate and plate age for large earthquakes at subduction zones predicts a magnitude (M W) of 8.0 which agrees very well with that of the Akita-Oki earthquake. This good agreement between the observed and predicted values of M W suggests that the empirical relation is valid for subduction zones with very small T and V such as the Juan de Fuca subduction zone, Pacific Northwest, for which V = 3 to 4 cm/year, T = 10 to 15 M years and M W = 8.4 has been estimated.
There is some indication that interplate slip at subduction zones with a very young (T < 20 M years) subducting plate has a significant amount of aseismic component, which increases the repeat time.
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References
Abe, K., Reliable estimation of the seismic moment of large earthquakes, J. Phys. Earth., 23, 381–390, 1975.
Ando, M., Source mechanisms and tectonic significance of historical earthquakes along the Nankai Trough, Japan, Tectonophysics, 27, 119–140, 1975.
Astiz, L. and H. Kanamori, An earthquake doublet in Ometepec, Guerrero, Mexico, Phys. Earth Planet. Inter., 34, 24–45, 1984.
Dziewonski, A. M., J. E. Franzen, and J. H. Woodhouse, Centroid-moment tensor solutions for April-June, 1983, Phys. Earth Planet. Inter., 33, 243–249, 1983.
Fukao, Y. and M. Furumoto,,Mechanism of large earthquakes along the eastern margin of the Japan Sea, Tectonophysics, 25,, 247–266, 1975.
Given, J. W. and H. Kanamori, The depth extent of the 1977 Sumbawa Indonesia earthquake, abstract, Eos, 61, 1044, 1980.
Heaton, T. H. and H. Kanamori, Seismic potential associated with subduction in the Northwestern United States, Bull. Seis. Soc. Am., 74, 933–941, 1984.
Imamura, A., On the seismic activity of central Japan, Japanese J. Astron. Geophys., 6, 119–137, 1928.
Ishikawa, Y., M. Takeo, M. Katsumata, M. Takahashi, S. Kashiwabara, and N. Mikami, The focal process of the 1983 Nihonkai-Chubu earthquake, Abstract, Seismol. Soc. Japan, 1983, No. 2, 19, 1983 (in Japanese).
Kanamori, H., Seismological evidence for a lithospheric normal faulting-the Sanriku earthquake of 1933, Phys. Earth Planet. Inter., 4, 289–300, 1971.
Kanamori, H., The energy release in great earthquakes, J. Geophys. Res., 82, 2981–2987, 1977a.
Kanamori, H., Seismic and aseismic slip along subduction zones and their tectonic implications, in Isl.,. d Arcs, Deep Sea Trenches and Back-Arc Basins, edited by M. Talwani and W. C. Pittman, pp. 163–174, Maurice Ewing Series, American Geophysical Union, Washington, D.C., 1977b.
Kanamori, H., Global seismicity, in Earthquakes: Observation, Theory and Interpretation, edited by H. Kanamori and E. Boschi, pp. 596–608, North-Holland, Amsterdam, 1983.
Kanamori, H. and J. W. Given, Use of long-period surface waves for rapid determination of earthquake-source parameters, Phys. Earth Planet. Inter., 27, 8–31, 1981.
Knamori, H. and K. C. Mcnally, Variable rupture mode of the subduction zone along the Ecuador-Colombia Coast, Bull. Seis. Soc. Am., 72, 1241–1253, 1982.
Kobayashi, Y., Beginning of plate subduction, The Earth Monthly, 3, 510–518, 1983 (in Japanese)
Lay, T., H. Kanamori, and L. Ruff, The asperity model and the nature of large subduction zone earhquakes, Earthq. Predict. Res., 1, 3–71, 1982.
Minster, J. B. and T. H. Jordan, Present-day plate motions, J. Geophys. Res., 83, 5331–5354, 1978.
Nakamura, K., Possible nascent trench along the eastern Japan Sea as the convergent boundary between Eurasian and North American plates, Bull. Earthquake Res. Inst., Univ. Tokyo, 58, 711–722, 1983 (in Japanese).
Otofuji, Y. and T. Matsuda, Paleomagnetic evidence for the clockwise rotation of Southwest Japan, Earth and Planet. Sci. Lett., 62, 349–359, 1983.
Otofuji, Y., T. Matsuda, K. Nagao, and S. Nohda, Paleomagnetism of tertiary tuff, in the Tohoku district, Japan, abstract of the paper presented at the annual meeting of Ate Japanese Society for Geomagnetism and Geoelectricity, May 1984, Iii - 42, 1984 (in Japanese).
Peterson, E. T. and T. Seno, Factors affecting seismic moment release rates in subduction zones, J. Geophys. Res., 89, 10,233–10, 248, 1984.
Ruff, L. and H. Kanamori, Seismicity and the subduction process, Phys. Earth Planet. Inter., 23, 240–252, 1980.
SA Fake, K., The mechanism of the 1983 Japan Sea earthquake as inferred from long-period surface waves and tsunamis, Phys. Earth Planet. Inter., 37, 249–260, 1985.
Satake, K., K. Abe, S. Yamaki, Y. Ishikawa, and M. Takeo, The source process of the 1983 Nihonkai-Chubu earthquake, Abstract, Seismol. Soc. Japan, 1983, No. 2, 17, 1983 (in Japanese).
Sato, T., M. Kosuge, K. Tanaka, and H. Sato, Aftershock distribution of the Nihonkai-Chubu earthquake, Abstract, Seismol. Soc. Japan, 1984, No. 1, 37, 1984 (in Japanese).
Seno, T., Is Northern Japan a part of the North American plate?, The Earth, Monthly, 6, 49–54, 1984.
Seno, T. and T. Eguchi, Seismotectonics of the Western Pacific, in Geodynamics of the Western Pacific Indonesian Region, edited by T. W. C. Hilde and S. Uyeda, pp. 5–46, Geodynamic Ser., 11, Am. Geophys. Union and Geological Soc. Am., 1983.
Shimazaki, K. and J. Mori, Focal mechanism of the May 26, 1983, Japan Sea earthquake, Abstract, Seismol. Soc. Japan, 1983, No. 2, 15, 1983.
Shimazaki, K. and T. Nakata, Time-predictable recurrence model for large earthquakes, Geophys. Res. Lett., 7, 229–282, 1980.
Stewart, G., Implications for plate tectonics of the August 19, 1977, Indonesia decoupling normal fault earthquake, abstract, Eos, 59, 326, 1978.
Suyehiro, K., A. Nishizawa, T. Urabe, N. Kanazawa, T. Hirata, H. Shimamura, and T. Iwasaki, Aftershock distribution of the 1983 Nihonkai-Chubu earthquake during the observation period of Obs, Abstract, Seismol. Soc. Japan, 1984, No. 1, 40, 1984.
Sykes, L. R. and R. C. Quittmeyer, Repeat times of great earthquakes along simple plate boundaries, in Earthquake Prediction-An International Review, edited by D. W. Simpson and P. G. Richards, pp. 217–247, Maurice Ewing Series; 4, American Geophysical Union, Washington, D.C., 1981.
Tara, T., Nihonkai-Chubu earthquake and crustal deformation, The Earth Monthly, 6, 18–21, 1984.
Takahashi, M., N. Nishide, A. Fukutome, M. Komiya, K. Sato, Y. Kanbayashi, K. Sakuma, H. Yokoyama, and K. Yoshikawa, Summary of the 1983 Nihonkai-Chubu earthquake, Abstract, Seismol. Soc. Japan, 1983, No. 2, 1, 1983 (in Japanese).
Tamaki, K., Structure and tectonics of the eastern border of the Japan Sea, The Earth Monthly, 6, 38–48, 1984 (in Japanese).
Tohoku University and Hirosaki University, Seismicity associated with the 1983 Nihonkai-Chubu earthquake, Abstract, Seismol. Soc. Japan, 1983, No. 2, 3, 1983 (in Japanese).
Umino, N., T. Matsuzawa, K. Obara, H. Shimizu, A. Hasegawa, A. Takagi, M. Kosuge, K. Tanaka, T. Sato, and H. Sato, Distribution of aftershocks of the 1983 Nihonkai-Chubu earthquake, Seismol. Soc. Japan, 1983, No. 2, 4, 1983 (in Japanese).
Usami, T., Descriptive Catalogue of Disast. Earthquakes in Japan, 327 pp., Univ. of Tokyo Press, Tokyo, 1975 (in Japanese).
Uyeda, S. and H. Kanamori, Back-arc opening and the mode of subduction, J. Geophys. Res., 84, 1049–1061, 1979.
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Kanamori, H., Astiz, L. (1985). The 1983 Akita-Oki Earthquake (M W = 7.8) and Its Implications for Systematics of Subduction Earthquakes. In: Kisslinger, C., Rikitake, T. (eds) Practical Approaches to Earthquake Prediction and Warning. Springer, Dordrecht. https://doi.org/10.1007/978-94-017-2738-9_6
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