В работе впервые рассмотрен широкий круг вопросов, связанных с историей развития рельефа Курило-Камчатсхой области. Проводится анализ истории образования различных типов морфоструктур в новейшее время. Особое внимание уделено анализу динамики образования морфоструктур под действием тектонических процессов и специфике формирования рельефа вулканических областей. Выделены основные тектонические эпохи.

We report new electron microscopy and high-precision EMP data on tephra from five modern (2009-2011)
eruptions from Kamchatka and Kurile Islands volcanoes. All the studied tephra contain fresh volcanic glass.
Fresh magmatic material prevails in Kliuchevskoi and Sarychev Peak tephra as well as in tephra erupted from
Kizimen volcano in January 2011. Tephra from the initial eruptions of Kizimen volcano (December 2011)
and from Shiveluch and Koriaksky eruptions mainly consist of crystallized rock fragments and crystals
with subordinate amount of glass. Most of the analyzed volcanic glass shards have normal alkalinity and
moderate-K composition as the majority of Kamchatkan magmas. Composition of glasses from the 2010
eruptions of Kliuchevskoi and Shiveluch are consistent with the expected ones for the current period of
their evolution. Composition of volcanic glass from the 2010-2011 eruptions from Kizimen is identical to
that from its largest pre-historic eruptions. This fact implies that a magmatic chamber of stable rhyolitic
composition has been present under Kizimen volcano for at least 10 kyr.

The article presents new data from field observations at Karymskiy in August 2012, which were carried out by a complex of equipment allowing recording infrasonic fluctuations, aerodynamic noise and intensity of the atmospheric electric field and volumetric activity of underground radon. It is shown that integrated geophysical observations are quite informative to monitor explosive volcanic activity. The analysis of wave disturbances in the atmosphere (the aerodynamic noise, air shock waves) and seismic events accompanying the fragmentation of magma allow us to get an insight about the physics of the explosive process. The dynamics of volumetric activity of radon near to Karymskiy is correlated to the activity of the volcano, which indicates the perspective of such observations.

The paper presents the results of Brouton Bay (Simushir Island, the Kurile Islands) echo-sounding
investigations had been made in July 2011 during complex scientific and research expedition of FSBSO
Institute of Marine Geology and Geophysics FEB RAS by means of «Lowrance LMS-527cDF iGPS» echo
sounder with oscillator frequency of 50/200 kHz and built-in 12-channel GPS receiver. We worked out
57 km of depth sounding profiles and constructed Brouton Bay bathymetric map and 3D-model. The bay
maximum depth comprised 250 m and the caldera total depth comprised about 700 m. Submarine slopes
of the bay have an angle ~ 15-25° to the depths of 200-220 m, then they have an angle of 5-10°to the vast
nearly flat bottom at the depths of 240-250 m.

В работе впервые рассмотрен широкий круг вопросов, связанных с историей развития рельефа Курило-Камчатсхой области. Проводится анализ истории образования различных типов морфоструктур в новейшее время. Особое внимание уделено анализу динамики образования морфоструктур под действием тектонических процессов и специфике формирования рельефа вулканических областей. Выделены основные тектонические эпохи.