The large earthquake of 27 August 2008 in Lake Baikal and its precursors

Russian Geology and Geophysics - Tập 52 - Trang 405-410 - 2011
R.M. Semenov1, O.P. Smekalin1
1Institute of the Earth’s Crust, Siberian Branch of the Russian Academy of Sciences, ul. Lermontova 128, Irkutsk, 664033, Russia

Tóm tắt

Abstract The large earthquake which shook the southern part of Lake Baikal on August 27, 2008 has received much scientific and public interest. The occurrence of the event in the high-seismicity Baikal rift was not surprising but its origin time was, as usual, unexpected. We discuss the geological conditions of the earthquake, its macroseismic effects, and some data interpreted as its precursors. A special focus is made on preseismic changes in dissolved helium in Lake Baikal. Studying helium patterns in a deep freshwater lake in an active seismic area is a pioneering experience that appears to have no match in the world earthquake prediction practice.

Tài liệu tham khảo

Barsukov, 1989, Messengers of Trouble (Search for Chemical Earthquake Prediction Tools) [in Russian] Barsukov, 1992, Geochemical Methods for Earthquake Prediction [in Russian] Borovik, 1971, Probability of future large earthquakes in the Baikal region, Izv. AN SSSR, Fizika Zemli, 21 Chipizubov, 1999, Fault scarps and the causative prehistoric earthquakes in the Main Sayan Fault zone, Geologiya i Geofizika (Russian Geology and Geophysics), 40, 936 Gileva, N.A. , 1989. Local seismicity in the Kodar–Udokan area of the Baikal rift zone, in: Seismology and Antiseismic Construction in the Russian Far East. Proc. All-Union Conf. [in Russian]. DVGI DVO AN SSSR, Vladivostok, p. 70. Gorbushina, 1972, The formation mechanism of hydrogeological anomalies of radioactive elements in active seismic areas and their implications for earthquake prediction, Sovetskaya Geologiya, 153 Gratsinskii, 1967, Emanation of radioactive gases from rock samples under ultrasonic effects, Izv. AN SSSR, Fizika Zemli, No. 10, 91 Jiang, 1978, The Haicheng Earthquake of 4 February 1975 Karus, 1974, Prediction of shallow earthquakes, New Seismological and Seismogeological Data from Uzbekistan [in Russian], 292 Khitarov, 1974, Earthquake-related geochemical effects, New Seismological and Seismogeological Data from Uzbekistan [in Russian], 303 Knauf, 1987, Physical processes in seismic areas of Tien Shan, with implications for most informative earthquake precursors, Physical Background for Predicting Rock Failure in Earthquakes [in Russian], 82 Koval, 2003, Mercury in the source of the Angara River: Five-year concentration trend and possible reasons of its variations, Dokl. Earth Sci., 389, 282 Litinetskii, 1980, Nature, the Inventor: Wonderful Weather Forecasters and Alive Seismographs (Some Aspects of Bionics) [in Russian] Litinetskii, 1988, Precursors of Underground Tempests [in Russian] Mavlyanov, 1983, Hydrogeological and Seismological Earthquake Precursors [in Russian] Mogi, 1985, Earthquake Prediction Nersesov, 1976, Seismic quiescence before large earthquakes, Physics of Earthquakes [in Russian], 146 Nikonov, 1981, Predictors of Underground Storms [in Russian], Znanie—Sila, 16 Prasolov, 1990, Isotope Geochemistry and the Origin of Natural Gases [in Russian] Rikitake, 1976, Earthquake Prediction Romashkova, 2001, Seismicity dynamics before and after world great earthquakes, 1985–2000, Computational Seismology, Issue 32: Problems of Lithospheric Dynamics and Seismicity [in Russian], 162 Ruzhich, 2002, The 25 February 1999 South Baikal earthquake: seismotectonics and regional geodynamics, Geologiya i Geofizika (Russian Geology and Geophysics), 43, 470 Ryabinin, G.V., Khatkevich, Yu.M., 2008. Morphological classification and analysis of hydrochemical earthquake precursors (with an example of the southeastern Kamchatka Peninsula), in: Chebrov, V.N., Saltykov, V.A. (Eds.), Geophysical Monitoring and Seismic Safety in the Russian Far East. Proc. Regional R&D Conf. [in Russian]. GS RAN, Petropavlovsk-Kamchatskii, Book 2, pp. 49–53. Semenov, 2007, Search for medium- and short-term earthquake precursors, Problems of Modern Seismogeology and Geodynamics of Central Asia, Proc. Workshop [in Russian], 135 Semenov, 2009, The large earthquake of 27 August 2008 in Lake Baikal: geological conditions, precursors, and macroseismic effects, Sovremennye Tekhnologii. Sistemnyi Analiz. Modelirovanie, No. 1, 51 Semenov, 2009, Lake Baikal was a warning about a coming earthquake, Priroda, 64 Sidorin, 1992, Earthquake Precursors [in Russian] Sobolev, 1987, Failure of barriers: implications for earthquake prediction, Physical Background for Predicting Rock Failure in Earthquakes [in Russian], 58 Sobolev, 1993, Fundamentals of Earthquake Prediction [in Russian] Sobolev, 1999, Nucleation of large earthquakes in Kamchatka, Vulkanologiya i Seismologiya, 63 Sobolev, 2003, Seismic properties of the interior and exterior zones of an earthquake source, Vulkanologiya i Seismologiya, 3 Sobolev, 2002, Dynamics of some potential earthquake sources in Kamchatka, Catastrophic Processes and Their Environmental Consequences, Book 2: Seismicity [in Russian], 429 Sobolev, 1996, Anomalies in low-energy seismicity patterns before large earthquakes in Kamchatka, Vulkanologiya i Seismologiya, 64 Sobolev, 1984, Patterns of local seismicity before the Ust’-Kamchatka earthquake of 15 December 1971, Izv. AN SSSR, Fizika Zemli, No. 4, 17 Strakhov, 1999, Seismic Risk Zoning of the Russian Federation: A Set of Maps (SRM-97). Scale 1:8,000,000. Explanatory Note and the List of Cities and Villages in Areas of Seismic Hazard [in Russian] Tikhonov, 1996, Long-term earthquake prediction in southern Sakhalin, FSSN and Prognoz Zemletryasenii, 3, 3 Ulomov, 1971, Look out! An Earthquake! [in Russian] Ulomov, 1967, On a precursor to a large tectonic earthquake, Dokl. Akad. Nauk SSSR, 176, 319 Vartanyan, 2000, Geology, Exploration, and Appraisal of Fuel Deposits, Issue 6: Fluids, Geodynamic Filtration, and Formation of Fracture Permeability in the Course of Sediment Subsidence [in Russian] Wiss, 1987, Precursory seismic quiescence, in: Physical and Observational Basis for Intermediate-Term Earthquake Prediction: Open-File Report 87-591. Menlo-Park, Ca., 2, 526 Zav’yalov, 2006, Intermediate-Term Earthquake Prediction: Fundamentals, Methods, Implementation [in Russian]