Abstract
The complex seismotectonic studies of the pleistoseist area of the Ilin-Tas earthquake (M s = 6.9), one of the strongest seismic events ever recorded by the regional seismic network in northeastern Russia, are carried out. The structural tectonic position, morphotectonic features of present-day topography, active faults, and types of Cenozoic deformations of the epicentral zone are analyzed. The data of the instrumental observations are summarized, and the manifestations of the strong seismic events in the Yana–Indigirka segment of the Cherskii seismotectonic zone are considered. The explanation is suggested for the dynamical tectonic setting responsible for the Andrei-Tas seismic maximum. This setting is created by the influence of the Kolyma–Omolon indenter, which intrudes into the Cherskii seismotectonic zone from the region of the North American lithospheric plate and forms the main seismogenic structures of the Yana–Indigirka segment in the frontal zone (the Ilin-Tas anticlinorium). The highest seismic potential is noted in the Andrei- Tas block—the focus of the main tectonic impacts from the Kolyma–Omolon superterrane. The general trend of this block coincides with the orientation of the major axis of isoseismal ellipses (azimuth 50°–85°), which were determined from the observations of macroseismic effects on the ground after the Uyandina (M s = 5.6), Andrei-Tas (M s = 6.1), and Ilin-Tas (M s = 6.9) earthquakes.
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
References
Fujita, K., Kozmin, B.M., Mackey, K.G., et al., Seismotectonics of the Chersky seismic belt, eastern Russia (Yakutia) and Magadan district, Russia, in Geology, Geophysics and Tectonics of Northeastern Russia: A Tribute to Leonid Parfenov, Stone, D.B., Fujita, K., Layer, P.W., Miller, E.L., Prokopiev, A.V., and Toro, J., Eds., Stephan Mueller Spec. Publ. Ser., 2009, vol. 4, pp. 117–145.
Gaiduk, V.V. and Prokop’ev, A.V., Metody izucheniya skladchato- nadvigovykh poyasov (Methods for Studying the Foldand- Thrust Belts), Novosibirsk: Nauka, 1999.
Global CMT Catalog. http://www.globalcmt.org/CMTsearch.html
Gusev, G.S., Skladchatye struktury i razlomy Verkhoyansko-Kolymskoi sistemy mezozoid (Folded Structures and Faults of the Verkhoyansk–Kolyma Mesozoides), Moscow: Nauka, 1979.
Imaev, V.S., Imaeva, L.P., and Koz’min, B.M., Aktivnye razlomy i seismotektonika Severo-Vostochnoi Yakutii (Active Faults and Seismotectonics of the Northeastern Yakutia), Yakutsk: Yakutskii Nauchnyi Tsentr, 1990.
Imaev, V.S., Imaeva, L.P., and Koz’min, B.M., Seismotektonika Yakutii (Seismotectonics of Yakutia), Moscow: GEOS, 2000.
Imaeva, L.P., Koz’min, B.M., and Imaev, V.S., Seismotectonics of the northeastern segment of Cherskii Range, Otechestvennaya Geol., 2009, no. 5, pp. 94–100.
Imaeva, L.P., Imaev, V.S., and Koz’min, B.M., Seismotectonic analysis of the Yana–Indigirka segment of the Chersky Zone, Izv., Phys. Solid Earth, 2011a, vol. 47, no. 12, pp. 1045–1057.
Imaeva, L.P., Koz’min, B.M., and Imaev, V.S., Source zone dynamics of the strong earthquakes within the northeastern margin of the Momo–Selennyakh basins, Otechestvennaya Geol., 2011b, no. 5, pp. 113–119.
Imaeva, L.P., Imaev, V.S., Koz’min, B.M., and Smekalin, O.P., Regularities in seismotectonic destruction of Cherskii seismic belt (ChSB),Materialy Vserossiiskogo soveshchaniya “Sovremennaya geodinamika Tsentral’noi Azii i opasnye prirodnye protsessy: rezul’taty issledovanii na kolichestvennoi osnove (Proc. All-Russian Conf. “Recent Geodynamics of Central Asia and Natural Hazards: Quantitative Estimates”), Irkutsk: IZK SORAN, 2012, vol. 2, pp. 28–31.
Kopp, M.L., Struktury lateral’nogo vyzhimaniya v Al’piisko- Gimalaiskom kollizionnom poyase (Lateral Squeeze Structures in the Alpine–Himalayan Collision Belt), Moscow: Nauchnyi Mir, 1997.
Koz’min, B.M., Imaev, V.S., and Imaeva, L.P., Seismicity and Recent Geodynamics, in Tektonika, geodinamika i metallogeniya territorii respubliki Sakha (Yakutiya) (Tectonics, Geodynamics, and Metallogeny of the territory of Sakha (Yakutiya) Republic), Moscow: Nauka, 2001, pp. 33–67.
Koz’min, B.M., Shibaev, S.V., Imaeva, L.P., Imaev, V.S., Petrov, V.S., and Timirshin, K.V., Recent activity of seismic belts in Yakutia, Kontinental’nyi riftogenez i soputstvuyushchie protsessy. Materialy vtorogo Vserossiiskogo simpoziuma s mezhdunarodnym uchastiem (Continental Rifting and Associated Processes. Proc. 2nd All-Russian Symp. with Int. Participation), Irkutsk: IZK So RAN, 2013, pp. 167–171.
Leonov, M.G., Kolodyazhnyi, S.Yu., and Zykov, D.S., Intraplate structural–kinematic parageneses as markers of lateral flows in the lithosphere of mobile belts and platforms, in Geodinamicheskaya evolytsiya litosfery tsentral’noaziatskogo podvizhnogo poyasa (ot okeana k kontinentu) (Geodynamic Evolution of the Lithosphere within the Central Asian Mobile Belt: from Ocean to Continent), Irkutsk: IZK SORAN, 2009, vol. 2, pp. 170–173.
Parfenov, L.M., Kontinental’nye okrainy i ostrovnye dugi mezozoid Severo-Vostoka Azii (Continental Margins and Island Arcs of the Mesozoides in Northeastern Asia), Novosibirsk: Nauka, 1984.
Parfenov, L.M. et al., Collage of the terrains of the Verkgoyanks–Kolyma orogenic region, in Tektonika, geodinamika i metallogeniya territorii respubliki Sakha (Yakutiya) (Tectonics, Geodynamics, and Metallogeny of the territory of Sakha (Yakutiya) Republic), Moscow: Nauka, 2001, pp. 199–254.
Prokop’ev, A.V. and Deikunenko, A.V., Deformation structures of the fold-and-thrust belts, in Tektonika, geodinamika i metallogeniya territorii respubliki Sakha (Yakutiya) (Tectonics, Geodynamics, and Metallogeny of the territory of Sakha (Yakutiya) Republic), Moscow: Nauka, 2001, pp. 156–198.
Recent earthquakes located by Alert Survey. Geophys. Survey of the Russ. Acad. Sci. http://www.ceme.gsras.ru Research Center for Earth Operative Monitoring of the Russian Federal Space Agency. http://eng.ntsomz.ru/
Shebalin, N.V., Ulomov, V.I., Tatevossian, R.E., Trifonov, V.G., Yoffe, A.I., and Kozhurin, A.I., Unified Seismogeological Taxonomv of the Northern Eurasia, Int. Union Geol. Geophys. Conf. Abstracts, Boulder, 1995, SB21C-14.
Suvorov, V.D. and Kornilova, Z.A., Crustal thickness in the southeast Verkhoyansk–Kolyma folded belt, Tikhookean. Geol., 1986, no. 4, pp. 32–35.
Trifonov, V.G., Soboleva, O.V., Trifonov, R.V., and Vostrikov, G.A., Sovremennaya geodinamika Al’piisko-Gimalaiskogo kollizionnogo poyasa. Trudy Geologicheskogo Instituta Ros. Akad. Nauk (Recent Geodynamics of the Alpine–Himalayan Collision Belt. Proc. Geol. Inst. Russ. Acad. Sci.) vol. 541, Moscow: GEOS, 2002.
Ulomov, V.I. and Shumilina, L.S., A new series of general seismic zoning maps for the territory of the Russian Federation, Seismostoik. stroit., 1998, no. 4, pp. 30–34.
Ulomov, V.I., Key points and technical guidelines for creating a new seismic zoning map for the territory of Russian Federation, in Seismichnost’ i seismicheskoe raionirovanie Severnoi Evrazii (Seismicity and Seismic Zoning of the North Eurasia), vols. 2–3, Moscow: OIFZ RAN, 1995, pp. 9–26.
Catalogs and Bulletins of Teleseismic Stations of the Geophysical Survey of the Russian Academy of Sciences. http://ftp.gsras.ru/pub/Teleseismic bulletin/2013
Author information
Authors and Affiliations
Corresponding author
Additional information
Original Russian Text © L.P. Imaeva, B.M. Koz’min, V.S. Imaev, K.G. Mackey, 2016, published in Fizika Zemli, 2016, No. 6, pp. 48–62.
Rights and permissions
About this article
Cite this article
Imaeva, L.P., Koz’min, B.M., Imaev, V.S. et al. Seismotectonic studies of the pleistoseist area of the M s = 6.9 Ilin-Tass earthquake in northeast Yakutia. Izv., Phys. Solid Earth 52, 821–835 (2016). https://doi.org/10.1134/S1069351316050050
Received:
Published:
Issue Date:
DOI: https://doi.org/10.1134/S1069351316050050