Re-examination of fault model for the 1982 Urakawa-oki earthquake by analyses of seismic, geodetic, and Tsunami data.

Suetsugu, Daisuke

doi:10.4294/jpe1952.36.53

Cited by 8 publications

(2 citation statements)

References 17 publications

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“…1). It was later strengthened by the occurrence of the 1982 Urakawa-oki earthquake (M 7.1) which also showed a P-axis sub-parallel to the trench (Moriya et al, 1983;Suetsugu and Nakanishi, 1988). The composite focal mechanism solutions for small earthquakes occurring in the vicinity of the Hidaka belt revealed the same trend (Suzuki et al, 1983a).…”

Section: Introductionmentioning

confidence: 71%

Stress due to the interseismic back slip and its relation with the focal mechanisms of earthquakes occurring in the Kuril and northeastern Japan arcs

2008

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Assuming a uniform and inhomogeneous distribution of back slip, based on a realistic configuration of the plate boundary that was newly determined from the distribution of earthquakes, we have investigated if the stress due to the interseismic back slip can explain the focal mechanisms of earthquakes occurring in the Kuril and northeastern Japan arcs. The inhomogeneous back-slip model was taken from the distribution of slip deficit estimated from GPS data collected in recent years. We examined the change in the Coulomb Failure Function (ΔCFF) for several target faults to evaluate the fitness of the models to the observed focal mechanisms. The results of ΔCFF are clearly different in the two back-slip models near the down-dip end of the locked zone. Despite this difference, the models can generally explain the earthquake focal mechanisms in the overriding plate as well as those on the megathrust plate boundary. However, they cannot explain the focal mechanisms of intermediate-depth earthquakes in the double-planed deep seismic zone. Neither can they fully explain the focal mechanisms with the pressure axis parallel to the trench that are observed at the junction of the Kuril and northeastern Japan arcs. Other tectonic processes, such as the transcurrent movement of the forearc sliver along the Kuril arc, may be involved in producing the stress anomaly.

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Section: Introductionmentioning

confidence: 71%

Stress due to the interseismic back slip and its relation with the focal mechanisms of earthquakes occurring in the Kuril and northeastern Japan arcs

2008

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“…If the mechanism solutions of the aftershocks located near the main shock are of the same type as that of the main shock, it can be said that the main shock may have taken place on Plane-C. As shown in Fig. 10 (c), the hypocentral distribution seems to indicate that the main shock is located on Plane-C. SUETSUGU and NAKANISHI (1987) also investigated a relation between the Fig. 13.…”

Section: Discussionmentioning

confidence: 99%

Velocity structure and aftershock distribution of the 1982 Urakawa-Oki Earthquake.

Miyamachi

Moriya

1987

J,Phys,Earth

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Numerical Simulations of Strong Ground Motion During Destructive Earthquakes in Hokkaido, Japan

Furumura¹

2001

Journal of Computational Acoustics

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Re-examination of fault model for the 1982 Urakawa-oki earthquake by analyses of seismic, geodetic, and Tsunami data.

Cited by 8 publications

References 17 publications

Stress due to the interseismic back slip and its relation with the focal mechanisms of earthquakes occurring in the Kuril and northeastern Japan arcs

Stress due to the interseismic back slip and its relation with the focal mechanisms of earthquakes occurring in the Kuril and northeastern Japan arcs

Velocity structure and aftershock distribution of the 1982 Urakawa-Oki Earthquake.

Numerical Simulations of Strong Ground Motion During Destructive Earthquakes in Hokkaido, Japan

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