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Papers by Victor Yanke

Research paper thumbnail of Forbush decreases associated with coronal mass ejections from active and non-active regions: statistical comparison

Monthly Notices of the Royal Astronomical Society

In this paper, Forbush decreases (FDs) from 1997 to 2020 associated with coronal mass ejections f... more In this paper, Forbush decreases (FDs) from 1997 to 2020 associated with coronal mass ejections from active and non-active regions are compared between themselves and to FDs caused by high-speed streams from coronal holes. The two types of sporadic FDs are also compared when corresponding solar wind (SW) disturbances contain, or do not contain, magnetic clouds (MCs) near Earth. Cosmic ray density and anisotropy variations, SW speed, interplanetary magnetic field (IMF) strength, and geomagnetic indices have been examined using statistical methods. The results reveal that these parameters are larger for FDs associated with active region (AR) ejections and have highly skewed distributions for both types of sporadic events. In the same ranges of SW parameters, FD magnitude is larger for flare-associated events; more efficient modulation occurs in FDs associated with AR ejections. Differences between FDs associated with AR and non-AR ejections are more pronounced when an MC is registered...

Research paper thumbnail of Variations in the Cosmic Ray Flux at the End of Solar Cycle 24

Bulletin of the Russian Academy of Sciences: Physics, 2021

Research paper thumbnail of Variations of barometric coefficients of the neutron component in the 22-23 cycles of solar activity

International Cosmic Ray Conference, 2011

ABSTRACT

Research paper thumbnail of Cosmic Ray Variations and Anisotropy Near Earth During The July 16, 2005 Forbush Decrease: Results From ANMODAP Center

atuauaio@,uhvs.uoa.ar: maeront@,cc. uoa.ar, amuhvsics@,vahoo.gr .culainakG2uhys.uoa.~r, , csarl@,... more atuauaio@,uhvs.uoa.ar: maeront@,cc. uoa.ar, amuhvsics@,vahoo.gr .culainakG2uhys.uoa.~r, , csarl@,isnet.nr, gsouv@isnet..gr A. Belov, E. Eroshenko, V. Yanke IZMIRAN, Russian Academy of Science, Moscow, Russia tel. 00 70953340925 abelov@,izmiran. rssi.ru, erosh@,inniran.ru, yanke@izmiran. rssi. ru E.G. Stassinopoulos Radiation Physics Office, Code 561, Applied Engineering and Technology Directorate NASA/Goddard Space Flight Center, Greenbelt, Maryland 20771, U.S.A. Euaminondas. G. Stassinououlos@,nasa.gov 15771 Athens Greece tel30 210 7276890 Fax 30 210 7276987

Research paper thumbnail of Forbush Decreases and Coronal Mass Ejections: Size Distribution

Research paper thumbnail of Heliospheric Modulation of Cosmic Rays in the Era of Neutron Monitoring

Bulletin of the Russian Academy of Sciences: Physics, 2021

Abstract The heliospheric modulation potential of galactic cosmic rays (CRs) is reconstructed for... more Abstract The heliospheric modulation potential of galactic cosmic rays (CRs) is reconstructed for the era of neutron monitoring. It is based on using a modern model of the interstellar spectrum of galactic CRs and the spectrum of CR density variations. The spectrum of CR variations is obtained via global spectrographic processing of continuous monitoring data from the world network of detectors and is calibrated using data from direct measurements of the particle spectrum on the PAMELA magnetic spectrometer in base year 2009.

Research paper thumbnail of On recurrent Forbush Decreases

Journal of Physics: Conference Series, 2019

Research paper thumbnail of Coronal holes in the long-term modulation of cosmic rays

Geomagnetism and Aeronomy, 2016

Long term cosmic ray variations in the heliosphere in cycles 21–24 are described using the multip... more Long term cosmic ray variations in the heliosphere in cycles 21–24 are described using the multiparametric model, including characteristics of solar activity. Long-term observations of the cosmic ray intensity, global solar magnetic field characteristics, and characteristics taking into account sporadic solar activity are the initial data for modeling cosmic ray variations. Data on intensity have been obtained from observations at the global ground network of neutron monitors and stratospheric sounding. The characteristics of the regions with an open magnetic field (coronal holes) have been introduced into the model in order to improve the description of long-term variations. The location (latitude), area, and magnetic flux of coronal holes have been used as parameters of this solar activity type manifestation. The modulation has been modeled for the entire studied period (1976–2012) and independently for periods with identical global solar magnetic field directions with regard to the cosmic ray variation delay relative to variations in the solar activity characteristics. It has been shown that the accuracy of long-term variation description improves when coronal hole characteristics are taken into account.

Research paper thumbnail of Contributions from changes in various solar indices in cycles 20–23 and 24 to the modulation of cosmic rays

Bulletin of the Russian Academy of Sciences: Physics, 2017

Research paper thumbnail of Simulation of the modulation of galactic cosmic rays during solar activity cycles 21–23

Bulletin of the Russian Academy of Sciences: Physics, 2007

Time variations in an important component of the space medium—galactic cosmic-ray (CR) flux—make ... more Time variations in an important component of the space medium—galactic cosmic-ray (CR) flux—make it possible to describe the state of the heliosphere, pre- dict space weather, and get insight into its past. The relationship between the observed CR flux and the solar activity, ...

Research paper thumbnail of Possible ground level enhancements at the beginning of the maximum of Solar Cycle 24

Journal of Physics: Conference Series, 2015

Three solar energetic proton events in the beginning of 2012 (January and March) revealed signifi... more Three solar energetic proton events in the beginning of 2012 (January and March) revealed significant increases of the integral proton fluxes with energies >100 MeV were analyzed by the data from subpolar neutron monitors (>500 MeV). As it was found the event on January 27, 2012 was followed by cosmic ray enhancement of about 2% at several subpolar and high latitude neutron monitors which coincided with the onset of the intensity increase in the GOES channels. This was also confirmed with the GOES/HEPAD data that allow us to consider the event on January 27, 2012 as a Ground Level Enhancement. The events in March 2012 (7.03 and 13.03) occurred under very complicated situation in the interplanetary space and a more detailed analysis is needed. Nevertheless, these events may contain some contribution of solar cosmic rays in the ground level observations.

Research paper thumbnail of Modeling variations in CR density in magnetic clouds

Bulletin of the Russian Academy of Sciences: Physics, 2015

Research paper thumbnail of Development of the Theory of Meteorological Effects in Cosmic Rays. (Abstract)

Research paper thumbnail of Search for Predictors of Forbush Decreases

Research paper thumbnail of Some problems of the theory of cosmic ray variations

Research paper thumbnail of Ground level enhancement of the solar cosmic rays on January 20, 2005

Research paper thumbnail of Study of the extremely great ground level enhancement (GLE) of the solar cosmic rays on February 23, 1956

Research paper thumbnail of Relation of The Skosmos Seriest Satellitess Malfunctions With Space Weather and With Malfunctions From Other Spacecrafts

We present preliminary results of a project (INTAS 0810) which is aimed to improve the methods of... more We present preliminary results of a project (INTAS 0810) which is aimed to improve the methods of safeguarding satellites in the Earth magnetosphere from the negative effect of space environment. Malfunction data on SKosmos seriesT satellites in the & cedil;period 1971-1999 are combined in one database together with similar information on other spacecrafts. This database contains, beyond the malfunctions information,

Research paper thumbnail of Forecast of Solar Flare Particle Events from the Neutron Monitor Network in Real Time

Research paper thumbnail of Space weather conditions and spacecraft anomalies in different orbits

Space Weather, 2005

A large database of anomalies, registered by 220 satellites in different orbits over the period 1... more A large database of anomalies, registered by 220 satellites in different orbits over the period 1971–1994, has been compiled. For the first time, data of 49 Russian Kosmos satellites have been included in a statistical analysis. The database also contains a large set of daily and hourly space weather parameters. A series of statistical analyses made it possible to quantify, for different satellite orbits, space weather conditions in the days characterized by anomaly occurrences. In particular, very intense fluxes (>1000 particles cm−2 s−1 sr−1 (pfu) at energy >10 MeV) of solar protons are linked to anomalies registered by satellites in high‐altitude (>15,000 km) near‐polar (inclination >55°) orbits typical for navigation satellites such as those used in the GPS network, NAVSTAR, etc. (the rate of anomalies increases by a factor of ∼20) and to a much smaller extent to anomalies in geostationary orbits (the rate increases by a factor of ∼4). The efficiency in producing ano...

Research paper thumbnail of Forbush decreases associated with coronal mass ejections from active and non-active regions: statistical comparison

Monthly Notices of the Royal Astronomical Society

In this paper, Forbush decreases (FDs) from 1997 to 2020 associated with coronal mass ejections f... more In this paper, Forbush decreases (FDs) from 1997 to 2020 associated with coronal mass ejections from active and non-active regions are compared between themselves and to FDs caused by high-speed streams from coronal holes. The two types of sporadic FDs are also compared when corresponding solar wind (SW) disturbances contain, or do not contain, magnetic clouds (MCs) near Earth. Cosmic ray density and anisotropy variations, SW speed, interplanetary magnetic field (IMF) strength, and geomagnetic indices have been examined using statistical methods. The results reveal that these parameters are larger for FDs associated with active region (AR) ejections and have highly skewed distributions for both types of sporadic events. In the same ranges of SW parameters, FD magnitude is larger for flare-associated events; more efficient modulation occurs in FDs associated with AR ejections. Differences between FDs associated with AR and non-AR ejections are more pronounced when an MC is registered...

Research paper thumbnail of Variations in the Cosmic Ray Flux at the End of Solar Cycle 24

Bulletin of the Russian Academy of Sciences: Physics, 2021

Research paper thumbnail of Variations of barometric coefficients of the neutron component in the 22-23 cycles of solar activity

International Cosmic Ray Conference, 2011

ABSTRACT

Research paper thumbnail of Cosmic Ray Variations and Anisotropy Near Earth During The July 16, 2005 Forbush Decrease: Results From ANMODAP Center

atuauaio@,uhvs.uoa.ar: maeront@,cc. uoa.ar, amuhvsics@,vahoo.gr .culainakG2uhys.uoa.~r, , csarl@,... more atuauaio@,uhvs.uoa.ar: maeront@,cc. uoa.ar, amuhvsics@,vahoo.gr .culainakG2uhys.uoa.~r, , csarl@,isnet.nr, gsouv@isnet..gr A. Belov, E. Eroshenko, V. Yanke IZMIRAN, Russian Academy of Science, Moscow, Russia tel. 00 70953340925 abelov@,izmiran. rssi.ru, erosh@,inniran.ru, yanke@izmiran. rssi. ru E.G. Stassinopoulos Radiation Physics Office, Code 561, Applied Engineering and Technology Directorate NASA/Goddard Space Flight Center, Greenbelt, Maryland 20771, U.S.A. Euaminondas. G. Stassinououlos@,nasa.gov 15771 Athens Greece tel30 210 7276890 Fax 30 210 7276987

Research paper thumbnail of Forbush Decreases and Coronal Mass Ejections: Size Distribution

Research paper thumbnail of Heliospheric Modulation of Cosmic Rays in the Era of Neutron Monitoring

Bulletin of the Russian Academy of Sciences: Physics, 2021

Abstract The heliospheric modulation potential of galactic cosmic rays (CRs) is reconstructed for... more Abstract The heliospheric modulation potential of galactic cosmic rays (CRs) is reconstructed for the era of neutron monitoring. It is based on using a modern model of the interstellar spectrum of galactic CRs and the spectrum of CR density variations. The spectrum of CR variations is obtained via global spectrographic processing of continuous monitoring data from the world network of detectors and is calibrated using data from direct measurements of the particle spectrum on the PAMELA magnetic spectrometer in base year 2009.

Research paper thumbnail of On recurrent Forbush Decreases

Journal of Physics: Conference Series, 2019

Research paper thumbnail of Coronal holes in the long-term modulation of cosmic rays

Geomagnetism and Aeronomy, 2016

Long term cosmic ray variations in the heliosphere in cycles 21–24 are described using the multip... more Long term cosmic ray variations in the heliosphere in cycles 21–24 are described using the multiparametric model, including characteristics of solar activity. Long-term observations of the cosmic ray intensity, global solar magnetic field characteristics, and characteristics taking into account sporadic solar activity are the initial data for modeling cosmic ray variations. Data on intensity have been obtained from observations at the global ground network of neutron monitors and stratospheric sounding. The characteristics of the regions with an open magnetic field (coronal holes) have been introduced into the model in order to improve the description of long-term variations. The location (latitude), area, and magnetic flux of coronal holes have been used as parameters of this solar activity type manifestation. The modulation has been modeled for the entire studied period (1976–2012) and independently for periods with identical global solar magnetic field directions with regard to the cosmic ray variation delay relative to variations in the solar activity characteristics. It has been shown that the accuracy of long-term variation description improves when coronal hole characteristics are taken into account.

Research paper thumbnail of Contributions from changes in various solar indices in cycles 20–23 and 24 to the modulation of cosmic rays

Bulletin of the Russian Academy of Sciences: Physics, 2017

Research paper thumbnail of Simulation of the modulation of galactic cosmic rays during solar activity cycles 21–23

Bulletin of the Russian Academy of Sciences: Physics, 2007

Time variations in an important component of the space medium—galactic cosmic-ray (CR) flux—make ... more Time variations in an important component of the space medium—galactic cosmic-ray (CR) flux—make it possible to describe the state of the heliosphere, pre- dict space weather, and get insight into its past. The relationship between the observed CR flux and the solar activity, ...

Research paper thumbnail of Possible ground level enhancements at the beginning of the maximum of Solar Cycle 24

Journal of Physics: Conference Series, 2015

Three solar energetic proton events in the beginning of 2012 (January and March) revealed signifi... more Three solar energetic proton events in the beginning of 2012 (January and March) revealed significant increases of the integral proton fluxes with energies >100 MeV were analyzed by the data from subpolar neutron monitors (>500 MeV). As it was found the event on January 27, 2012 was followed by cosmic ray enhancement of about 2% at several subpolar and high latitude neutron monitors which coincided with the onset of the intensity increase in the GOES channels. This was also confirmed with the GOES/HEPAD data that allow us to consider the event on January 27, 2012 as a Ground Level Enhancement. The events in March 2012 (7.03 and 13.03) occurred under very complicated situation in the interplanetary space and a more detailed analysis is needed. Nevertheless, these events may contain some contribution of solar cosmic rays in the ground level observations.

Research paper thumbnail of Modeling variations in CR density in magnetic clouds

Bulletin of the Russian Academy of Sciences: Physics, 2015

Research paper thumbnail of Development of the Theory of Meteorological Effects in Cosmic Rays. (Abstract)

Research paper thumbnail of Search for Predictors of Forbush Decreases

Research paper thumbnail of Some problems of the theory of cosmic ray variations

Research paper thumbnail of Ground level enhancement of the solar cosmic rays on January 20, 2005

Research paper thumbnail of Study of the extremely great ground level enhancement (GLE) of the solar cosmic rays on February 23, 1956

Research paper thumbnail of Relation of The Skosmos Seriest Satellitess Malfunctions With Space Weather and With Malfunctions From Other Spacecrafts

We present preliminary results of a project (INTAS 0810) which is aimed to improve the methods of... more We present preliminary results of a project (INTAS 0810) which is aimed to improve the methods of safeguarding satellites in the Earth magnetosphere from the negative effect of space environment. Malfunction data on SKosmos seriesT satellites in the & cedil;period 1971-1999 are combined in one database together with similar information on other spacecrafts. This database contains, beyond the malfunctions information,

Research paper thumbnail of Forecast of Solar Flare Particle Events from the Neutron Monitor Network in Real Time

Research paper thumbnail of Space weather conditions and spacecraft anomalies in different orbits

Space Weather, 2005

A large database of anomalies, registered by 220 satellites in different orbits over the period 1... more A large database of anomalies, registered by 220 satellites in different orbits over the period 1971–1994, has been compiled. For the first time, data of 49 Russian Kosmos satellites have been included in a statistical analysis. The database also contains a large set of daily and hourly space weather parameters. A series of statistical analyses made it possible to quantify, for different satellite orbits, space weather conditions in the days characterized by anomaly occurrences. In particular, very intense fluxes (>1000 particles cm−2 s−1 sr−1 (pfu) at energy >10 MeV) of solar protons are linked to anomalies registered by satellites in high‐altitude (>15,000 km) near‐polar (inclination >55°) orbits typical for navigation satellites such as those used in the GPS network, NAVSTAR, etc. (the rate of anomalies increases by a factor of ∼20) and to a much smaller extent to anomalies in geostationary orbits (the rate increases by a factor of ∼4). The efficiency in producing ano...