Earthquake migration and slow strain waves

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Abstract

Research of seismicity migration provide insight into the physical mechanisms of tectonic stress transmission and new opportunities for hazard assessment and prediction of various natural disasters associated with recent geodynamic activity. The review briefly presents the main results of studies of seismicity migration and the fundamental problem of tectonic stress transfer, obtained at the Institute of Tectonics and Geophysics, Far Eastern Branch of the Russian Academy of Sciences in the last decade.

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About the authors

Victor G. Bykov

Kosygin Institute of Tectonics and Geophysics, FEB RAS

Email: bykov@itig.as.khb.ru
ORCID iD: 0000-0002-0637-0112

Doctor of Sciences in Physics and Mathematics, Chief Researcher

Russian Federation, Khabarovsk

Tatjana V. Merkulova

Kosygin Institute of Tectonics and Geophysics, FEB RAS

Author for correspondence.
Email: merkulova@itig.as.khb.ru
ORCID iD: 0000-0003-1283-5032

Candidate of Sciences in Geology and Mineralogy, Leading Researcher

Russian Federation, Khabarovsk

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Supplementary files

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2. Fig. 1. Distribution of earthquake foci within the northern, northeastern, and eastern boundaries of the Amur Plate. 1 – faults, 2 – earthquake epicenters; 3 – conditional cluster boundaries. Conditional seismoactive blocks: I – Sakhalin, I-I – border eastern zone, II – eastern Tan-Lu zone, III – western Tan-Lu zone, IV – southeastern zone of the Olekma-Stanovoy seismic zone (OSZ), V – northeastern zone of the OSZ, VI – central zone of the OSZ, VII – western zone of the OSZ, VIII – eastern closure of the Baikal rift zone, IX – central zone of the southern branch of the OSZ, X – western zone of the southern branch of the OSZ. Faults (numbers in circles): 1 – Central Sakhalin; 2 – Central Sikhote-Alin; 3 - Ishu-Kharpinsky; 4 - Khingansky; 5 - Paukansky; 6 - Tugursky; 7 - North-Tukuringsky; 8 - Stanovoy; 9 - Tastakhsky; 10 - Melginsky; 11 - West Turansky; 12 - Selemdzhinsky; 13 - Busse-Norsky; 14 - Xinglungou; 15 - Temulyakitsky

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3. Fig. 2. Distribution of earthquake epicenters along the northern boundary of the Amur Plate. 1 – boundaries of lithospheric plates; 2 – epicenters of earthquakes with magnitude M > 3; 3 – epicenters of earthquakes with magnitude M > 5; 4 – main tectonic faults; 5 – spatial cycles of seismic activity. Lithospheric plates: EU – Eurasian, PA – Pacific, PH – Philippine, CH – Chinese, AM – Amur, OK – Okhotsk

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4. Fig. 3. Distribution of strong earthquakes in the Kuril-Kamchatka subduction zone and earthquake migration study profiles. 1 – profile positions, 2 – earthquakes with M ≥ 6.0

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5. Fig. 4. Earthquake migration and signs of hidden faults of sub-meridional direction. a – earthquake migration in zones A and B: 1 – regional faults; 2 – earthquakes (a – migration chains, b – others); 3 – migration chain and its direction. b – signs of faults of sub-meridional direction: 1 – isolines of regional anomaly of the gravity field; 2 – axes of anomalies of the magnetic field; 3 – zone of anomalously low values ​​of Vp/Vs; 4 – sedimentary depressions; 5 – migration chains. в – migration zones 3 and 4 in the structure of the earth's crust along the DSS profile: 1 – seismic boundaries; 2 – tectonic faults; 3 – areas of low Vp/Vs values

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