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Dive into the research topics where O. V. Kozyreva is active.

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Featured researches published by O. V. Kozyreva.


Russian Journal of Earth Sciences | 2017

ULF wave power index for space weather and geophysical applications: A review

V. A. Pilipenko; O. V. Kozyreva; M. J. Engebretson; A. A. Soloviev

A ULF wave index, characterizing the level of the geomagnetic field variability in the frequency range 2–7 mHz, has been suggested to the space physics and geophysical community. This global wave index is produced from all available arrays of magnetometers and isolated stations in the Northern hemisphere. A similar ULF wave index is calculated using magnetometer data from geostationary (GOES) and interplanetary (Wind, ACE) satellites. In this review we demonstrate that a wide range of space physics studies, such as the solar wind-ionosphere coupling, wave energy transport, substorm physics, relativistic electron energization, ring current formation, electrodynamics of the ionosphere and magnetosphere, search for electromagnetic precursors of earthquakes, etc., has benefited from the introduction of the provisional ULF wave index. Possible ways of the ULF index advancement and development are discussed. The permanently updating ULF-index database is freely available via the website ulf.gcras.ru for all interested researchers for further validation and statistical studies.


Solar-Terrestrial Physics | 2016

Correspondence between the ULF wave power spatial distribution and auroral oval boundaries

Ольга Козырева; O. V. Kozyreva; Вячеслав Пилипенко; V. A. Pilipenko; Марк Энгебретсон; M. J. Engebretson; Дмитрий Климушкин; Dmitriy Klimushkin; Павел Магер; P. N. Mager

Аннотация. Пространственное распределение волновой активности диапазона Pс5 во время магнитных бурь сопоставляется с положением границ аврорального овала. Полярная и экваториальная границы аврорального овала определялись по данным УФ-наблюдений на спутнике IMAGE из базы данных Британской Антарктической Службы или по модели OVATION, где использовались данные спутников DMSP. Показано, что в начальную фазу бури основной пик спектральной мощности широкополосных Рс5-колебаний отображается внутрь аврорального овала. Во время восстановительной фазы, максимум спектральной мощности узкополосных Рс5-волн в утреннем и вечернем секторах находился внутри аврорального овала или вблизи его экваториальной границы. Этот экспериментальный результат подтверждает ранее обнаруженные эффекты: пространственно-временные вариации мощности Pс5-волн в утреннем/дополуденном секторе тесно связаны с динамикой аврорального электроджета и магнитосферных продольных токов. При этом квази-монохроматические Pс5-волны демонстрируют типичные резонансные особенности в широтной структуре амплитуды и фазы. Таким образом, положение аврорального овала или его экваториальной границы является предпочтительной широтой для возбуждения магнитосферного альвеновского резонатора. Этот эффект не учитывается современными теориями Рс5-волн, но он может быть значимым для построения более адекватных моделей.


Earth, Planets and Space | 2018

Ground geomagnetic field and GIC response to March 17, 2015, storm

O. V. Kozyreva; V. A. Pilipenko; Vladimir Belakhovsky; Yaroslav A. Sakharov

The St. Patrick’s Day geomagnetic storm on March 17, 2015, has been chosen by the space community for synergetic analysis to build a more comprehensive picture of the storm’s origin and evolution. This storm had an unusually long (~u200917xa0h) main phase. During this period, many substorm-like activations occurred. These activations resulted in bursts of geomagnetically induced currents (GICs) in power lines on the Kola peninsula. To examine the substorm activations in more detail, we apply various data processing techniques for the world-wide array of magnetometers: the virtual magnetograms, magnetic latitude–local time (MLT) snapshots, and magnetic keograms. These techniques are simple tools that are supplementary to more advanced facilities developed for the analysis of SuperDARN, IMAGE, and CARISMA arrays. We compare the global spatial localization and time evolution of the geomagnetic X-component disturbance and magnetic field variability measured by the Hilbert transform of time derivative dB/dt. The latitude-MLT mapping of these magnitudes shows that very often a region with highest magnetic variability does not overlap with a substorm “epicenter” but is shifted to its poleward or equatorward boundaries. Highest variability of the geomagnetic field, and consequently intense GICs, are caused by medium-scale fast varying structures. There is no one-to-one correspondence between substorm intensity and GIC magnitude.


Archive | 1998

Coupling Between Substorms and ULF Disturbances in the Dayside Cusp

V. A. Pilipenko; O. V. Kozyreva; M. J. Engebretson; W. Jeffrey Hughes; Sergei L. Soloviev; K. Yumoto


Annales Geophysicae | 2016

Generation of resonant Alfvén waves in the auroral oval

V. A. Pilipenko; D. Yu. Klimushkin; P. N. Mager; M. J. Engebretson; O. V. Kozyreva


Solar-Terrestrial Physics | 2017

Suppression of the dayside magnetopause surface modes

Вячеслав Пилипенко; V. A. Pilipenko; Ольга Козырева; O. V. Kozyreva; Лиза Бэддели; Liza Baddeley; Дэг Лорентцен; D. A. Lorentzen; Владимир Белаховский; Vladimir Belakhovsky


Archive | 2004

Comparison of a ULF Wave Index With Dynamics of Geostationary Relativistic Electrons During Space Weather Month

O. V. Kozyreva; V. A. Pilipenko; Mark J. Engebretson; K. Yumoto


Standards and Monitoring in Education | 2018

University Preparation As the Stage of Formation of Social Maturity of Students with Health Limitations and Without Health Limitations

Наталья Дьякова; Natalya Dyakova; Ольга Козырева; O. V. Kozyreva; Л. Сырвачева; L. Syrvacheva


Standards and Monitoring in Education | 2018

Meditative Technologies in Realization of the Inclusive Educational Environment of Modern School

Василий Никуленков; Vasiliy Nikulenkov; Ольга Козырева; O. V. Kozyreva; Ольга Бабина; Ol'ga Babina; Мария Тукалова; Mariya Tukalova


Annales Geophysicae | 2017

Non-triggered auroral substorms and long-period (1–4 mHz) geomagnetic and auroral luminosity pulsations in the polar cap

N. Yagova; Natalia Nosikova; L. J. Baddeley; O. V. Kozyreva; D. A. Lorentzen; V. A. Pilipenko; M. G. Johnsen

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V. A. Pilipenko

Russian Academy of Sciences

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V. A. Pilipenko

Russian Academy of Sciences

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P. N. Mager

Russian Academy of Sciences

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D. A. Lorentzen

University Centre in Svalbard

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D. Yu. Klimushkin

Russian Academy of Sciences

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Natalia Nosikova

National Research Nuclear University MEPhI

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Ol'ga Babina

Siberian Federal University

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