Abstract
This paper presents new data on the upper mantle characteristics, and on seismicity and volcanism in Kamchatka.
It is shown that the seismic activity in the Pacific focal layer decreases sharply below that narrow line on which the foci of the active volcanoes are situated. A map of longitudinal wave velocitiesV p in the mantle upper layers under Kamchatka is given. The lowest values ofV p (7.3–7.6 km/sec) are found near the volcanic belt. The graphs Θ=lg (Es/Ep) (h) for the Kamchatka earthquakes indicate that Θmin at the depths of 120–250 km may be caused by a concentration of magmatic melts. A map of bodies (magma chambers?) screening S- and P-waves at the depths of 30–100 km under Kamchatka has been compiled. These bodies are mainly located under the belt of active volcanoes.
Similar content being viewed by others
References
Balesta, S. T., 1967,An Example of Application of Point Seismic Soundings with Refracted Waves in Studying the Deep Structure of the Avachinsky Volcano. Geol. i Geofiz., no. 8, p. 93–97 (in Russian).
Fedotov, S. A., 1966,Deep Structure, Upper Mantle Properties and Volcanic Activity in the Kurile-Kamchatka Island Arc According to Seismological Data for 1964. In: «Vulkanizm i glubinnoye stroyeniye Zemli», Izd. Nauka, Moscow, p. 8–24 (in Russian).
-----, 1968,On Deep Structure, Properties of the Upper Mantle and Volcanism of the Kurile-Kamchatka Island Arc According to Seismic Data. In:The Crust and Upper Mantle of the Pacific Area. Geophys. Monograph No. 12, Washington, p. 131–139.
----- andBoldyrev, S. A., 1969,On Dependence of Body Wave Absorption on the Frequency in the Crust and Upper Mantle of the Kurile Island Arc. Izv. AN SSSR, ser. «Fizika Zemli», no. 9, p. 17–33 (in Russian).
————— andFarberov, A. I., 1966,On Screening of Transversal Seismic Waves and the Magma Chambers in the Upper Mantle beneath the Avachinskaya Volcanic Group. Sb. «Vulkanizm i glubinnoye stroyeniye Zemli», Idz. Nauka, Moscow, p. 43–48 (in Russian).
----- andSlavina, L. B., 1968,Estimated Velocity of Longitudinal Waves in the Upper Mantle under the Northwestern Part of the Pacific Ocean and Kamchatka. Izv. AN SSSR ser. «Fizika Zemli», no. 2, p. 8–31 (in Russian).
Fedotov, S. A. andTokarev, P. I., Bagdasarova, A. M., Kuzin, I. P. andBobkov, M. F., 1969,Seismicity of Kamchatka and Komandor Islands and Its Connection with the Deep Structure of the Crust and Mantle. «Stroyeniye i razvitiye zemnoi kory na Sovetskom Dalnem Vostoke», Nauka, Moscow, p. 97–110 (in Russian).
Firstov, P. P. andShirokov, V. A., 1969,Localization of the Roots of the Klyuchevskaya Volcanic Group According to Seismic Data. «Vulkanizm, gydrotermy i glybiny Zemli», D-V knizhnoye Izd-vo, Petropavlovsk-Kamchatskiy, p. 12 (in Russian).
Tokarev, P. I., 1970,On the Focal Layer, Seismicity and Volcanism of the Kurile-Kamchatka Area. Izv. AN SSSR, ser. «Fizika Zemli», no. 3, p. 15–30 (in Russian).
----- andZobin, V. M., 1970,Peculiarities of the Near-earthquake Wave Propagation in the Earth’s Crust and Upper Mantle under the Kliuchevskaya Volcanic Group, Kamchatka. Bull. of the Volcanological Station, no. 46, Nauka, p. 17–23 (in Russian).
Vlodavetz, V. I., andPiip, B. I., 1957,Catalogue of the Active Volcanoes of Kamchatka. Bull. of the Volcanological Station, USSR Acad. of Sci., no. 25, p. 5–95 (in Russian).
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Fedotov, S.A., Tokarev, P.I. Earthquakes, characteristics of the upper mantle under kamchatka, and their connection with volcanism (according to data collected up to 1971). Bull Volcanol 37, 245–257 (1973). https://doi.org/10.1007/BF02597133
Received:
Revised:
Issue Date:
DOI: https://doi.org/10.1007/BF02597133