Goal. The paper reveals geostructural conditions of foreshocks and aftershocks swarm location for the strong (M=6.6) Khailinsky earthquake on the south margin of the Koryak Late Mesozoic micro-continent on the northeast of Asia. The margin is an active junction of the continent and the Olyutor Paleogene tectonic zone and is manifested at the surface in the Koryak seismic belt. A swarm of earthquakes is located within the north margin of the Olyutor Paleogene tectonic zone. Methods. The research methods are: geological and geophysical analysis of regional (aeromagnetic, gravimetric, geological) surveys of 1:200 000 scale, profile (magnetotelluric sounding method (MSM), converted waves method (CWM) and seismological data). The methodological basis is the idea of fault-block dislocations of active margins of the Pacific mobile belt in the introduced by the author concept of the block-and-key structure of the earth's crust at the continent-ocean junction. Results. The investigation showed that the northwestwards swarm Khailinsky earthquake didn't associate with any northeast geostructure or structures. Foreshocks and aftershocks of the Khailinsky earthquake were located within the revealed Khailinsky fault. The deep fault (traced even in the upper mantle) is associated with the mid-axial line of the northwestern earth's crust block. The block is bounded by two transverse intrablock faults and is dipping from the middle of Paleogene. The fault at the surface fixes the maximum dip of all the crust layers at the point of their keels. Planed coordinates of the hypocenter are on the fault, the third coordinate at a depth is at the fault vertical column above the point of depth junction of two Mesozoic and Paleogene terranes Three coordinates of hypocenter of the Khailinsky earthquake are characteristic for the hypocenter of the Olyutorsky earthquake (2006). Scientific novelty. For the first time ever we made a proved systematic conclusion on association of the Khailinsky and the Olyutorsky earthquakes mechanisms with the fault dislocations on the keels axis of the crust layers of the dipping block of Olyutorsky Bay. The solution is absent in the literature. The practical significance. Association of hypocenters with an axial fault is also common to uplifting blocks of the crust margin. In this case, the fault reveals maximum stresses in the uplifting layers of the crust -the locks. The data evidences on association of the Koryak (1988) and the Alpinschule (2013) earthquakes with the locks and the keels layers of crust blocks, respectively. Perhaps further work will allow us to understand tectonic features of association of strong earthquakes of the Koryak belt.
1. Aprelkov S.E., Dekina G.I., Popruzhenko S.V. Osobenosti geologicheskogo stroeniya Koryakskogo nagorya i basseyna r. Penzhina [Features of the geological structure Koryak plateau and the basin. Penzhina], Tihookeanskaya geology. [Pacific Geology], 1997, V. 16, no. 2, pp. 46-57.
2. Bielawski V.V., Zolotov E.E., Rakitov V.A., Nurmuhamedov A.G., Popruzhenko S.V., Shpak I.P., Hrapov AV. Glubinnaya seysmogeoelektricheskaya model vulkanogennogo Okhotsk-Chukotskogo poyasa v predelah profilya Korf - Verhnee Penzhina [Deep seismic and geoelectrikal model volcanogenic Okhotsk-Chukotka belt and the Central Koryak folded zone within the profile Korf - Top Penzhino], Olyutorskoe zemletryasenie 20 (21) aprelya 2006 Koryakskoe nagorye. Pervye rezultaty issledovany, Petropavlovsk-Kamchatsky [Olyutor earthquake 20 (21) 2006 April Koryak Highlands. First results research, Petropavlovsk-Kamchatsky], 2007, pp. 277-288.
3. Geologiya i mineralnye resursy Yaponii [Geology and Mineral Resources of Japan], Moskva , IL. [Moscow, IL], 1961, pp. 13-128, 141-267.
4. Geologicheskaya carta SSSR masshtaba 1: 200 000 .Seriya Koryakskaya. List P-59-XXVIII. Obyasnitelnaya zapiska [The geological map of the USSR, scale 1: 200 000. A series of Koryak. Sheet P-59-XXVIII. Explanatory note]. Koska M.K., Radchenko N.S., Savelyev N.A. , editor Anikeeva L.I., Moskva. [Moscow], 1972, 86 p.
5. Geologicheskaya carta SSSR masshtaba 1: 200 000. List P-58-XXVIII [Geological map of the USSR, scale 1: 200 000. The sheet P-58-XXVIII]. Pozdeev A.I, Rozhkova V.K., Moskva. [Moscow], 1975, 94 p.
6. Geologicheskoee stroenie Yaponskih ostrovov (Paleogeografiya Yaponskihh ostrovovv) [The geological structure of the Japanese islands (Paleogeography Japanese islands)], Moskva, Mir. [Moscow, World], 1968, pp. 14-696.
7. Zlobin T.K., Zlobina L.M., Gulenok R.Y. Stroenie zemnoy kory Ohotskogo morya i neftegazonostnost Zapadno-Kamchatskogo basseyna [Structure of the crust of the Okhotsk Sea and the oil and gas content]
8. West Kamchatka Basin magmatism], Geodinamika, magmatizm i mineralogenniya kontinetalnyh okrain Severa Patsifiki. Materialy Vseros. soveschaniya. [Geodynamics, magmatism and metallogeny of continental margins of the North Pacific, materials Russian national conference in 3 volumes], Magadan, 2003, V.2, pp. 40-43.
9. Karta poleznyh iskopaemyh Kamchatskoy oblasti masshtaba 1: 500 000. Listy 2-8, 11 [Map of mineral Kamchatka region, scale 1: 500 000. Sheets 2-8, 11], ed. Litvinov A.F., Patoka M.G., Markowski B.A. , edited and compiled by Frolov Yu. F. et al, maps factory everything, Sankt-Peterburg. [St. Petersburg], 1999, 19 p.
10. Kornilov B.A. Karta anomalnogo magnitnogo polya SSSR. List P-58, 59 [Map of the anomalous magnetic field USSR. Sheet P-58, 59], Moskva, Tsentrgeologiya, [Moscow, Geology center], 1971.
11. Lander A.V., Levina V.I., Ivanova E.I. Olyutorskoe zemletryasenie 20 (21) aprelya 2006 with Mw = 7.6: seysmicheskaya istoriya region and predvaritelnye rezultaty issledovaniya serii aftershokov [Olyutor earthquake 20 (21) in April 2006 with Mw = 7.6: seismic history of the region and the results of the study preliminary series of aftershocks], Olyutorskoe zemletryasenie 20 (21) aprelya 2006 Koryakskoe nagorye. Pervye rezultaty issledovany, Petropavlovsk-Kamchatsky [Olyutor earthquake 20 (21) 2006 April Koryak Highlands. First results research, Petropavlovsk-Kamchatsky], pp. 14-33.
12. Leonov V.L. Poperechnye struktury i ix vliyanie na razvitie chetvertichnogo vulkanizma [Transverse structures and their impact on the development of the Quaternary volcanism], Geodinamika, magmatizm i mineralogenniya kontinetalnyh okrain Severa Patsifiki. Materialy Vseros. soveschaniya. [Geodynamics, magmatism and metallogeny of continental margins of the North Pacific, materials Russian national conference in 3 volumes], Magadan, 2003, V. 3. pp. 158-162.
13. Moroz Y.F. Stroenie osadochno-vulkanogennogo chehla Kamchatki po geofizicheskim dannym [The structure of the sedimentary-volcanogenic cover of Kamchatka on geophysical data], Tihookeanskaya Geology. [Pacific Geology], 1991, no. 1, pp. 59-67.
14. Melekestsev I.V., Schanzer A.E., Erlich E.N. et al. Kamchatka, Kurilskie and Komandorskie ostrova (istoriya razvitiya relefa Sibiri and Dalnego Vostoka) [Kamchatka, Kuril and Commander Islands acute (history of relief development of Siberia and the Far East)], Moskva, Nauka. [Moscow, Science], 1974, 437 p.
15. Nurmukhamedov A.G. Glubinoe stroenie severo Vostochnoy chasti Koryaksko-Kamchatskoy skladchatoy oblasti po geofizicheskim dannym [Deep structure of the north-eastern part of the Koryak-Kamchatka-step warehouse area of geophysical data], avtoreferat kand. geol.-min. nauk , IZK. Irkutsk. [synopsis cand. geol.-min. science, Earth Crust, Irkutsk] , 2010, 17 p.
16. Rogozhin E.A., Ovsyuchenko A.N., Marahanov A.V., Novikov S.S., Pinegina T.K. Rezultaty geologicheskogo i makroseysmicheskogo izucheniya epitsentralnoy oblasti [Results geological and macro seismic study of the epicentral area], Olyutorskoe zemletryasenie 20 (21) aprelya 2006 Koryakskoe nagorye. Pervye rezultaty issledovany, Petropavlovsk-Kamchatsky [Olyutor earthquake 20 (21) 2006 April Koryak Highlands. First results research, Petropavlovsk-Kamchatsky], 2007, 290 p.
17. Seliverstov N.I. Stroenie dna prikamchatskih akvatory i geodinamika zony sochleneniya Kurilo-Kammchatskoy i Aleutskoy ostrovnyh dug [The structure of the bottom of the Kamchatka waters and geodynamics of the articulation zone of the Kuril-Kamchatka and Aleutian island arcs], Moskva, Nauka. [Moscow, Science], 1998, 164 p.
18. Struktury kontinentalnoy i perehodnoy zemnoy kory na kosmicheskih snimkah [The structure of the continental and transitional crust into space images], ed. Philatatov N.I., Egorova I.V., Dvoryankin A.I .et al, Moskva, Nedra. [Moscow, Mineral Resources], 1984, 211 p.
19. Tarasenko T.V., Dmitriev V.D., Yarotskiy G.P. et al. Megabloki i metallogenicheskaya izonalnost Kioryakskogo niagorya i Kamchatki [Mega block and metallogenic zoning of the Koryak Highlands and Kamchatka], Metallogeniya and novaya globalnaya tektonika. Vsesoyuznoe NTS «Problemy metalogenii», Leningrad. [Metallogeniya and the new global tectonics, NTS-Union "Problems of metallogeny, Leningrad], 1973, pp. 93-95.
20. Tektonicheskaya karta Ohotomorskogo regiona mashtaba 1: 2 500 000 [Tectonic map of the Okhotsk Sea Region scale 1: 2 500 000], ed. N.A. Bogdanov and V.E. Hain, Moskva, ILRAN. [Moscow, ILRAN], 2000.
21. Fedotov S.A., Chekhovich V.D., Egorkin A.V. Neogenovaya glubinnaya struktura yuga Koryakskogo nagorya i sovremennaya seysmichnost regiona [Neogen deep structure in the Southern Koryak highland and contemporary seismicity of the region], DAN, 2011, V. 437, no. 5, pp. 655-658.
https://doi.org/10.1134/S1028334X1104012X
22. Shafranovsky I.I, Plotnikov L.M. Simmetriya v geologii [Symmetry in geology], Leningrad, Nedra. [Leningrad, Mineral Resources], 1975, 144 p.
23. Erlich E.N. Sovremennaya struktura i chetvertichny vulkanizm zapadnoy chasti Tihookeanskogo koltsa [The modern structure and quaternary volcanism western part of the Pacific Rim], Novosibirsk, Nauka, sibirskoe otdelenie [Novosibirsk, Science. Siberian Branch], 1973, pp. 3-132.
24. Yarotskiy G.P. Megabloki i metallogenicheskaya zonalnost Koryakskogo nagorya i Kamchatki [Megablock and metallogenic zonality Koryak Highlands and Kamchatka], All-Union Scientific and Technical Council "Problems of metallogeny", Leningrad, Nedra. [ Leningrad, Mineral Resources], 1973, pp. 93-95.
25. Yarotskiy G.P . Proyavlenie simmetrii v razmeschenii razryvnyh dislokatsy i mineragenicheskih faktorov Severo-Kamchatskogo seronosnogo rayona [Manifestation of symmetry in the placement of explosive dislocations and minerageny factors North Kamchatka], sulfur-bearing area symmetry structures of geological bodies, Leningrad, Nedra. [Leningrad, Mineral Resources], 1976, pp. 88-90.
26. Yarotskiy G.P. Otrazhenie in Tsentralno-Kamchatskom vulkannichesko poyase razryvnoy tektoniki ego osnovaniya [Reflection in Central Kamchatka volcanic belt breaking tectonic its base], Geol. structure and mineral resources of Kamchatka, Moskva. [Moscow], 1983.
27. Yarotskiy G.P. Zakonomernosti razmescheniya vulkanicheskih sernyh mestorozhdeny Tihoookeanskogo rudnogo poyasa (Koryakiya, Kamchatka, Kurily, Yaponiya) [Laws placing volcanic sulfur deposits Pacific ocean - one ore belt (Koryak, Kamchatka, Kurily, Japan)], Petropavlovsk-Kkamchatsky, Universitet imeni Vitus Beringa, Kamchatka. [Petropavovsk-Kamchatsky, University Vitus Bering, Kamchatka], 2006, 138 p.
28. Yarotskiy G.P. Poperechnye dislokatsii aktivnyh okrain kontinentov Tihookeanskogo rudnogo poyasa [Cross deployment of active continental margins of the Pacific ore belt], Petropavlovsk-Kkamchatsky, Universitet imeni Vitus Beringa, Kamchatka. [Petropavovsk-Kamchatsky, University Vitus Bering, Kamchatka], 2007, 301 p.
29. Yarotskiy G.P. Veroyatnoe zamykanie Chukotskogo seysmicheskogo poyasa v Koryakskom nagorye. Geologo-geograficheskoe istolkovanie [Likely closure of the Chukchi seismic belt in the Koryak Highlands. Geological interpretation of geographical], Problemy sovr. seysmologii i geodinamiki Tsentr. i Vost. Azii. Materialy Vseros. sovesch. c mezhdunarodnym sotrudnichestvom,18-24 sentyabrya 2007, Irkutsk. [Problems of the present-day, Geodynamics and Seismology Center and east Asia, materials Russian national conference, September 18-24, Irkutsk], 2007, V. 2, pp. 210-216.
30. Yarotskiy G.P. Seysmichnost i razlomnaya tektonika yugo-zapada Koryakskogo nagorya [Seismicity and faulted tectonic southwest Koryak Highland], proc. Region, conf. "Tectonophysics and topical issues of the Earth Sciences, on the 40th anniversary of the M.V. Gzovskaya tectonophysics laboratory in IPE RAS ", Moskva, IFZ RAN, [Moscow, IPE RAS], 2008, V. 2, pp. 372-375.
31. Yarotskiy G.P. Razlomno-blokovaya tektonika aktivnoy okrainy kontinenta na yugo-zapade Koryakskogo nagorya kak veroyatny istochnik zemletryaseny [Fault-block tectonics active continental margin in southwestern Koryak highlands as the likely source of earthquake], Int. Conf. "Seismological monitoring of the territory of the CIS countries to improve the effectiveness and efficiency of seismic monitoring in seismically region.", Obninsk, GS RAS, 2008, pp. 354-359.
32. Yarotskiy G.P. Veroyatnaya prichina vozniknoveniya zemletryaseny na Morskoy tranzitali litosfery Severo-Vostoka Azii [The probable cause of the earthquakes on the sea transital lithosphere Northeast Asia ], Faulting and seismicity of the lithosphere: the tectonic-physical concepts and consequences: materials All-Russian Conference (Irkutsk, August 18-21, 2009), V.2, Irkutsk, Institut zemnoy kory CO RAN. [Irkutsk: Institute of Earth's Crust], 2009, pp. 80-83.
33. Yarotskiy G.P. Razlomno-blokovaya tektonika litosfery severo Vostochnoy chasti Tihookeanskogo poberezhya Evrazii kak istochnik zemletryaseny na yugo-zapade Koryakskogo nagorya [Fault-block tectonics litosfery the northeastern part of the Pacific coast of Eurasia as a source earthquake in southwestern Koryak Highland], Geodinamikka. [Geodynamics], 2010, no. 1 (9), pp. 28-36