Abstract
Tidal records at Hanasaki, southeastern Hokkaido, are analysed to clarify the post-seismic crustal vertical movement in the 1973 Nemuro-oki, Japan, earthquake. The result shows that the post-seismic uplift, as speculated byKasahara (1975), terminated in late 1975 and reverted to the previous rate of rapid subsidence of about 1 cm/yr. Ceasing of the post-seismic uplift, which occurred much earlier than previously speculated, could be explained by supplementary mechanisms, such as frictional resistance against creeping at the fault surface. This unexpected mode of movement, however, raises a new question about the accumulation of tectonic movements in this district. Since the subsidence rate extrapolated from geomorphological data for the past several thousand years is almost one order of magnitude lower than the recent rate as mentioned above, we have to provide some alternative explanation for the discrepancy between the two rates. In other words, simple repetition of co-, post- and inter-seismic movements in seismic cycles due to plate subduction, must be modified in this district. Several possible modifications to the subduction process are suggested, and a brief discussion of vertical movements expected in each case is given.
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
References
Utsu, T. (1972),Large Earthquakes Near Hokkaido and the Expectancy of a Large Earthquake off Nemuro, Rep. Coord. Comm. Earthq. Pred.7, 7–13 (...in Japanese).
Shimazaki, K. (1974),Nemuro-oki Earthquake of June 17, 1973: a Lithospheric Rebound at the Upper Half of the Interface, Phys. Earth Planet. Inter.9, 314–327 (...in Japanese).
Ando, M. (1973),On the Earthquake off Nemuro Peninsula, June 17, 1973. Presented at the 22nd Meeting, Coordinating Committee for Earthquake Prediction (23 August, 1973)
Tada, T. (1974),Fault Model and Crustal Movement of the 1973 Nemuro-oki Earthquake, Zisin, J. Seism. Soc. Japan27, 120–128 (...in Japanese).
Shimazaki, K. (1974),Pre-Seismic Crustal Deformation Caused by an Underthrusting Oceanic Plate in Eastern Hokkaido Japan, Phys. Earth Planet. Inter.8 148–157.
Hydrographic Department Maritime Safety Agency (1974),Submarine Topography, Geological Structure and Total Magnetic Forces off Kushiro. Rep. Coord. Comm. Earthq. Pred.11, 24–30 (...in Japanese).
Geographical Survey Institute (1974),Crustal Movements in the Eastern Part of Hokkaido Associated with the Earthquake off Nemuro Peninsula, 1973, Rep. Coord. Comm. Earthq. Pred.11, 7–13 (...in Japanese).
Abe, K., andYokoyama, I. (1974),An Expected Major Earthquake off the Coast of Eastern Hokkaido, Rep. Coord. Comm. Earthq. Pred.11, 45–50 (...in Japanese).
Hatori, T. (1974),Source Area of the Tsunami off the Nemuro Peninsula in 1973 and its Comparison with the Tsunami in 1894, Spec. Bull. Earthq. Res. Inst.13 67–76 (...in Japanese).
Hatori, T. (1975),Tsunami Activity in Eastern Hokkaido after the Nemuro Peninsula Earthquake in 1973, Zisin, J. Seism. Soc. Japan28, 461–471 (...in Japanese).
Sekiya, H., Hisamoto, S., Mochizuki, E., Kobayashi, E., Kurihara, T., Tokunaga, K., andKishio, M. (1974),The off-Nemuro Peninsula Earthquake of 1973 and the Large Earthquakes off the Southern Part of Hokkaido, Q. J. Seismol.39, 33–39 (...in Japanese).
Regional Coordinating Committee for Earthquake Prediction, Vol.1 (1977), 45–64. (...in Japanese)
Abe, K. (1977),Some Problems in the Prediction of the Nemuro-oki Earthquake, J. Phys. Earth,25, Suppl., S261-S271.
Kasahara, K. (1975).Aseismic Faulting Following the 1973 Nemuro-oki Earthquake, Hokkaido, Japan (a Possibility), Pure appl. Geophys.113, 127–139.
Kasahara, K., andHirai, M. (1976),Post-seismic Crustal Movement of the Nemuro Peninsula (Abstract), Programme and Abstracts, Seism. Soc. Japan, 1976, No.2, 63 (...in Japanese).
Kato, T., andTsumura, K. (1979),Vertical Land Movements in Japan as Deduced from Tidal Records (1951–1978), Bull. Earthq. Res. Inst.54, 559–628 (...in Japanese).
Tsumura, K. (1963),Investigation of Mean Sea Level and its Variation Along the Coast of Japan (Part I)—Regional Distribution of Sea Level Variation, J. Geod. Soc. Japan9, 49–90 (...in Japanese).
Dambara, T. (1971),Synthetic Vertical Movements in Japan During the Past 70 Years, J. Geod. Soc. Japan17, 100–108 (...in Japanese).
Yoshii, T. (1975),Proposal of the ‘Aseismic Front’, Zisin, J. Seism. Soc. Japan28, 365–367 (...in Japanese).
Geographical Survey Institute (1975),Crustal Deformation in the Southeastern Part of Hokkaido after the off-Nemuro Peninsula Earthquake, 1973, Rep. Coord. Comm. Earthq. Pred.13, 1–3 (...in Japanese).
Yoshikawa, T., Kaizuka, S., andOta, Y. (1964),Crustal Movement in the Late Quaternary Revealed by Coastal Terraces on the Southeast Coast of Shikoku, Southwestern Japan, J. Geod. Soc. Japan10, 116–122.
Thatcher, W., Matsuda, T., Kato, T., andRundle, J. B. (1980),Lithospheric Loading by the 1896 Riku-u Earthquake, Northern Japan: Implications for Plate Flexure and Asthenospheric Rheology, J. Geophys. Res. (in press).
Yoshii, T. (1979),A Detailed Cross-Section of the Deep Seismic Zone Beneath Northeastern Honshu Japan, Tectonophysics55, 349–360.
Nakamura, K. (1977),Why do Coastal Terraces on Peninsulas Tilt Away from Trenches? Rep. Regional Coord. Comm. Earthq. Pred. 41–44. (...in Japanese)
Den, N. (1968),Submarine Topography and Distribution of Epicenters of Shallow Earthquakes, Geophys. Bull. Hokkaido Univ.20, 111–124 (...in Japanese).
Shimazaki, K. (1980),Holocene Uplift of Coastal Terraces and Intra-plate, Inter-plate Earthquakes, Chikyu (the Earth) 2, 17–24 (...in Japanese).
Fukao, Y. (1979),Tsunami Earthquakes and Subduction Processes near Deep-sea Trenches, J. Geophys. Res.84, 2303–2314 (...in Japanese).
Nur, A., andMavko, G. (1974),Postseismic Viscoelastic Rebound, Science183, 204–206
Rundle, J. B. (1978),Viscoelastic Crustal Deformation by Finite, Quasistatic Sources, J. Geophys. Res.83, 5937–5945.
Thatcher, W., andRundle, J. B. (1979),A Model for the Earthquake Cycle in Underthrust Zones, J. Geophys. Res.84, 5540–5556.
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Kasahara, K., Kato, T. Aseismic faulting following the 1973 Nemuro-oki earthquake, Hokkaido, Japan (a retrospective study). PAGEOPH 119, 392–403 (1980). https://doi.org/10.1007/BF00877774
Received:
Issue Date:
DOI: https://doi.org/10.1007/BF00877774