Characteristics of the 1983 Tottori earthquake sequence and its relation to the tectonic stress field

Nishida, Ryohei

doi:10.1016/0040-1951(90)90325-3

Cited by 9 publications

(11 citation statements)

References 23 publications

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“…2a). Another large-slip region, with a maximum slip of 0.5 m, is located to the NNW of Kanamori (1972), Nishida (1990), andFukuyama et al (2003), respectively. Brown, orange, and violet stars denote their hypocenters determined by JMA.…”

Section: Methodsmentioning

confidence: 97%

“…Tottori Prefecture has been struck by several large crustal earthquakes with severe damage, such as the 1943 Tottori earthquake (M JMA 7.2) (e.g., Kanamori 1972;Kaneda and Okada 2002), the 1983 central Tottori earthquake (M JMA 6.2) (e.g., Nishida 1990;Yoshimura 1994), and the 2000 western Tottori earthquake (M JMA 7.3) (e.g., Fukuyama et al 2003;Iwata and Sekiguchi 2002). In particular, the 1943 Tottori earthquake caused crippling damage to Tottori City and its surroundings due to strong ground motions.…”

Section: Introductionmentioning

confidence: 99%

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Source rupture process of the 2016 central Tottori, Japan, earthquake (M JMA 6.6) inferred from strong motion waveforms

Kubo

Suzuki

Aoi

et al. 2017

Earth Planets Space

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The source rupture process of the 2016 central Tottori, Japan, earthquake (M JMA 6.6) was estimated from strong motion waveforms using a multiple-time-window kinematic waveform inversion. A large slip region with a maximum slip of 0.6 m extends from the hypocenter to the shallower part, caused by the first rupture propagating upward 0-3 s after rupture initiation. The contribution of this large slip region to the seismic waves in the frequency band of the waveform inversion is significant at all stations. Another large slip region with smaller slips was found in northnorthwest of the hypocenter, caused by the second rupture propagating in the north-northwest direction at 3-5 s. Although the contribution of this slip region is not large, seismic waveforms radiating from it are necessary to explain the later part of the observed waveforms at several stations with different azimuths. The estimated seismic moment of the derived source model is 2.1 × 10 18 Nm (M w 6.1). The high-seismicity area of aftershocks did not overlap with largeslip areas of the mainshock. Two wave packets in the high frequency band observed at near-fault stations are likely to correspond to the two significant ruptures in the estimated source model.

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Section: Methodsmentioning

confidence: 97%

Section: Introductionmentioning

confidence: 99%

Source rupture process of the 2016 central Tottori, Japan, earthquake (M JMA 6.6) inferred from strong motion waveforms

Kubo

Suzuki

Aoi

et al. 2017

Earth Planets Space

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“…The main shock (No. 1) has a fault length of 5 km as shown by a solid line along which bilateral rupture was propagated (NISHIDA, 1988). Event No.…”

Section: Datamentioning

confidence: 99%

“…3 (M=4.8) occurred on Nov. 3 at the northwest end of the main fault. The latter event may be considered as the largest aftershock which has an immediate connection with the main shock NISHIDA, 1988).…”

Section: Datamentioning

confidence: 99%

“…However, we cannot determine the geometry of the fault planes of the clusters from the distribution of hypocenters, because of relatively large errors involved in the hypocenter locations. According to NISHIDA (1988), who determined fault-plane solutions for a large number of the events shown in Fig. 1(b), Event 3 and its aftershocks have a similar focal mechanism.…”

Section: Other Featuresmentioning

confidence: 99%

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Complex source process of a small earthquake with M4.8.

Nishigami

1989

J,Phys,Earth

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Dissipative Intraplate Faulting During the 2016 M_w6.2 Tottori, Japan Earthquake

et al. 2018

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The 2016 Mw 6.2 Tottori earthquake occurred on 21 October 2016 and produced thousands of aftershocks. Here we analyze high‐resolution‐relocated seismicity together with source properties of the mainshock to better understand the rupture process and energy budget. We use a matched‐filter algorithm to detect and precisely locate >10,000 previously unidentified aftershocks, which delineate a network of sharp subparallel lineations exhibiting significant branching and segmentation. Seismicity below 8 km depth forms highly localized fault structures subparallel to the mainshock strike. Shallow seismicity near the main rupture plane forms more diffuse clusters and lineations that often are at a high angle (in map view) to the mainshock strike. An empirical Green's function technique is used to derive apparent source time functions for the mainshock, which show a large amplitude pulse 2–4 s long. We invert the apparent source time functions for a slip distribution and observe a ~16 km2 patch with average slip ~3.2 m. 93% of the seismic moment is below 8 km depth, which is approximately the depth below which the seismicity becomes very localized. These observations suggest that the mainshock rupture area was entirely within the lower half of the seismogenic zone. The radiated seismic energy is estimated to be 5.7 × 1013 J, while the static stress drop is estimated to be 18–27 MPa. These values yield a radiation efficiency of 5–7%, which indicates that the Tottori mainshock was extremely dissipative. We conclude that this inefficiency in energy radiation is likely a product of the immature intraplate environment and the underlying geometric complexity.

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Characteristics of the 1983 Tottori earthquake sequence and its relation to the tectonic stress field

Cited by 9 publications

References 23 publications

Source rupture process of the 2016 central Tottori, Japan, earthquake (M JMA 6.6) inferred from strong motion waveforms

Source rupture process of the 2016 central Tottori, Japan, earthquake (M JMA 6.6) inferred from strong motion waveforms

Complex source process of a small earthquake with M4.8.

Dissipative Intraplate Faulting During the 2016 M_w6.2 Tottori, Japan Earthquake

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Characteristics of the 1983 Tottori earthquake sequence and its relation to the tectonic stress field

Cited by 9 publications

References 23 publications

Source rupture process of the 2016 central Tottori, Japan, earthquake (M JMA 6.6) inferred from strong motion waveforms

Source rupture process of the 2016 central Tottori, Japan, earthquake (M JMA 6.6) inferred from strong motion waveforms

Complex source process of a small earthquake with M4.8.

Dissipative Intraplate Faulting During the 2016 Mw6.2 Tottori, Japan Earthquake

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Dissipative Intraplate Faulting During the 2016 M_w6.2 Tottori, Japan Earthquake