Near Islands Aleutian Earthquake with  M  W  = 7.8 on July 17, 2017: I. Extended Rupture along the Commander Block of the Aleutian Island Arc from Observations in Kamchatka

D. V. Chebrov; Yu. A. Kugaenko; A. V. Lander; I. R. Abubakirov; A. A. Gusev; S. Ya. Droznina; S. V. Mityushkina; D. A. Ototyuk; V. M. Pavlov; N. N. Titkov

doi:10.1134/S1069351319040037

Near Islands Aleutian Earthquake with M_W = 7.8 on July 17, 2017: I. Extended Rupture along the Commander Block of the Aleutian Island Arc from Observations in Kamchatka

作者: Chebrov D.V.¹^,2, Kugaenko Y.A.¹, Lander A.V.³, Abubakirov I.R.¹, Gusev A.A.¹^,3, Droznina S.Y.¹, Mityushkina S.V.¹, Ototyuk D.A.¹, Pavlov V.M.¹, Titkov N.N.¹^,4
隶属关系:
1. Kamchatka Branch, Federal Research Center Geophysical Survey of Russian Academy of Sciences
2. Schmidt Institute of Physics of the Earth, Russian Academy of Sciences
3. Institute of Earthquake Prediction Theory and Mathematical Geophysics, Russian Academy of Sciences
4. Institute of Volcanology and Seismology, Far Eastern Branch, Russian Academy of Sciences
期: 卷 55, 编号 4 (2019)
页面: 576-599
栏目: Article
URL: https://journals.rcsi.science/1069-3513/article/view/224981
DOI: https://doi.org/10.1134/S1069351319040037
ID: 224981

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The largest instrumentally recorded regional back-arc earthquake with M_W = 7.8, M_C = 8.2 occurred on July 17, 2017 on the Bering transform fault (the boundary between the Beringia minor lithospheric plate and the Komandorskii (Commander) block of the Aleutian island arc). This seismic event, called the Near Islands earthquake or Near Islands Aleutian earthquake, caused the ground to shake with intensity I = 5–6 on Bering Island and a small tsunami wave on the Near Islands. The specific aspects of the peculiarities of the pattern of seismicity of the northwestern segment of the Aleutian arc and the tectonic position of the Near Island Aleutian earthquake, the details of its prompt processing, macroseismic manifestations, analysis results of ground motion peak amplitudes, focal mechanisms, and earthquake source models are discussed. The coseismic displacements according to the GNSS data are presented. It is concluded that the source of the Near Islands Aleutian earthquake did not fill the seismic gap near the Commander Islands, and the possibility of the strongest earthquake hitting the northwestern part of the Aleutian arc remains.

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earthquake, Bering Fault, Commander segment of the Aleutian arc, tsunami, focal mechanism, coseismic displacements, coseismic deformation, peak ground motion

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Near Islands Aleutian Earthquake with M_W = 7.8 on July 17, 2017: I. Extended Rupture along the Commander Block of the Aleutian Island Arc from Observations in Kamchatka

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D. Chebrov

Yu. Kugaenko

A. Lander

I. Abubakirov

A. Gusev

S. Droznina

S. Mityushkina

D. Ototyuk

V. Pavlov

N. Titkov

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Near Islands Aleutian Earthquake with MW = 7.8 on July 17, 2017: I. Extended Rupture along the Commander Block of the Aleutian Island Arc from Observations in Kamchatka

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Near Islands Aleutian Earthquake with M_W = 7.8 on July 17, 2017: I. Extended Rupture along the Commander Block of the Aleutian Island Arc from Observations in Kamchatka