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Mechanism of underthrusting in southwest Japan: A model of convergent plate interactions
Open accessAbstract
An elastic rebound mechanism consistent with underthrusting at the time of the magnitude 8.2 Nankaido earthquake of 21 December, 1946 accounts for a reversal in sense between seismic and preseismic changes in elevation throughout a large portion of southwest Japan. It is shown that the seismic movements during the earthquake were generated by slip on a complex thrust fault that is inferred to intersect the surface near the base of the continental slope. The preseismic deformation is explained by strain accumulation equivalent to a virtual dislocation with the same orientation as the fault surface but a sense opposite to that of the real dislocation that occurred at the time of the earthquake. Adjustments by slip along the fault surface and extensions of that surface can account for postseismic movements.
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Citations
Cited by
Rupture zones of large South American earthquakes and some predictions
Kelleher, J. A. (1972) · Journal of Geophysical Research · doi:10.1029/jb077i011p02087 · Cited by 406
Thermal constraints on the seismogenic portion of the southwestern Japan subduction thrust
Hyndman, R. D., Wang, K., & Yamano, M. (1995) · Journal of Geophysical Research: Solid Earth · doi:10.1029/95jb00153 · Cited by 326
Origin and Development of the Philippine Sea
UYEDA, S., & BEN-AVRAHAM, Z. (1972) · Nature Physical Science · doi:10.1038/physci240176a0 · Cited by 320
Metadata
- Authors
- Fitch, T. J., & Scholz, C. H.
- Venue
- Journal of Geophysical Research
- Publisher
- American Geophysical Union (AGU)
- Published
- 1971-10-10
- Volume
- 76
- Issue
- 29
- Pages
- 7260-7292
- ISSN
- 0148-0227 (ISSN-L)
- OpenAlex
- W2013823208
- Cited by
- 310
- References
- 0
- FWCI
- 13.16
- Type
- journal article
- Language
- en
- Open access
- green
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- Fitch, T. J., & Scholz, C. H. (1971). Mechanism of underthrusting in southwest Japan: A model of convergent plate interactions. Journal of Geophysical Research. https://doi.org/10.1029/jb076i029p07260
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Bibliographic data: Semantic Scholar, OpenAlex, Crossref.
Contains information from the Semantic Scholar Academic Graph Datasets, made available under the ODC Attribution License (ODC-BY 1.0).
Semantic Scholar’s data is described in: Kinney, R., et al. (2023). The Semantic Scholar Open Data Platform. arXiv:2301.10140.
