Boris Mikhailovich Shevtsov

Institute of Cosmophysical Researches and Radio Wave Propagation · Far Eastern Branch Russian Academy of Sciences

Complex methods and results of studies of physical processes and their interactions in the system of near space and geospheres under conditions of increased variability of solar, cyclonic and seismic activity are presented. The results of long-term observations are summed up. Methods of system analysis have been developed. Models of nonlinear and r...

На основе теоретических и экспериментальных исследований проанализированы особенности распространения УК и СВЧ радиоволн над морем. Рассмотрены особенности распространения радиоволн в слоисто-неоднородной атмосфере на основе метода инвариантного погружения. Во второй части книги результаты численных расчетов сравниваются с экспериментальными данным...

The results of wideband geophysical processes observations by means of laser strainmeters and special geo-acoustic equipment are presented. The examples of synchronous registering of strain-seismic and geo-acoustic earth oscillations in Kamchatka and Moscow region as well as parallel analysis of the obtained data are shown. These results reveal the...

This paper reports results from observations of broadband geophysical processes using laser interferometer strainmeters and special acoustic instruments. We demonstrate examples of synchronous recordings of earth strain variations and geoacoustic oscillations of the ground surface in Kamchatka and in the Moscow Region, as well as results from a par...

We report the results of the use of the World Wide Lightning Location Network data to analyze the core structure of super typhoons that occurred in the northwestern Pacific Ocean in 2012–2013. The distributions of lightning discharges are compared to the ocean-surface wind fields according to the data of the Advanced Scatterometer (ASCAT) and the i...

This paper reports two unique auroral features: postmidnight purple auroral rays and global Pc1 geomagnetic pulsations, observed before the onset of the corotating interaction region (CIR) storm of 21 March 2017, at the beginning of the first campaign of the new Particles and Waves in the Inner magnetosphere using Ground-based network observation (...

Continuous record of natural electromagnetic Very Low Frequency (VLF) radiation is carried out in IKIR FEB RAS by a multichannel VLF detector. The receiving site is located far from industrial noises. The measurement station provides the following: data acquisition; graphic representation of data; storage of data in the required form for further an...

Lidar is considered as an electron energy detector of ionosphere precipitations, and the cleaning of radiation belts is like the energy pumping of the ionosphere layer. The excitation efficiency of ionosphere plasma components by precipitations and the features of resonant backscattering of laser radiation in the active ionosphere are discussed. It...

The development of a volcanic plume from the Shiveluch volcano explosion on November 16, 2014, is analyzed using a complex of geophysical methods. The start of the explosion was detected by seismic data. The World Wild Lightning Location Network (WWLLN) allowed the localization of volcanic lightning discharges that occurred during the first stage o...

The lightning localization task is very interested for the meteorologist organizations, airlines, networks operators, military and etc. The electromagnetic properties of lightning can be measured using VLF sensor. The paper deals with some hardware and software of VLF sensors used in IKIR FEB RAS.

To clarify the effect of the dawn and dusk terminators on Pi2 pulsations, we statistically analyzed the longitudinal phase and amplitude structures of Pi2 pulsations at middle- to low-latitude stations (GMLat = 5.30°–46.18°) around both the dawn and dusk terminators. Although the H (north–south) component Pi2s were affected by neither the local tim...

We investigate pearl structures (amplitude modulations) of Pc1 pulsations simultaneously observed at Athabasca (ATH, 54.7°N, 246.7°E, L = 4.3) in Canada, Magadan (MGD, 60.1°N, 150.7°E, L = 2.6) in Russia, and Moshiri (MOS, 44.4°N, 142.3°E, L = 1.5) in Japan. From 6 years of ground observations, from 2008 to 2013, we selected 84 Pc1 events observed...

The data obtained by the World Wide Lightning Location Network (WWLLN) in the territory of Zabaykal’e are compared with the data received by the equipment for observations of Earth’s natural pulse electromagnetic field installed in Buryatia. Diurnal and seasonal dependence of lightning strokes observed in Zabaikal’e territory were obtained. It was...

According to the results of lidar observations in 2014, new experimental data are presented. They confirm the possibility of correlation of lidar signals backscattering at the wavelength of 532 nm with the parameters determining plasma content in the nighttime ionospheric F2 layer. The possibility of application of the lidar method in ionosphere in...

Synoptic and mesoscale cyclone systems over an ocean and seas are often accompanied by thunderstorm activity, which intensity and spatial distribution are modulated by the dynamic structure of these systems. The paper considers a method connecting the parameters of this thunderstorm activity with weather system structures over oceans and seas with...

According to WWLLN data, a sequence of lightning discharges was detected. It occurred on the path of propagation of eruptive ash cloud formed in the result of the explosive eruption of Shiveluch volcano on 16 November 2014 in Kamchatka. Information on the cloud motion was confirmed by the measurements of atmospheric electricity, satellite observati...

Synoptic and mesoscale cyclonic systems over the ocean and seas are often accompanied by thunderstorm activity, the intensity and spatial distribution of which is modulated by the dynamic structure of these systems. Lightning discharges are sources of electromagnetic radiation in the range of very low frequencies (VLF) and are detected by VLF locat...

New experimental data which confirm episodic occurrence of the correlation of light backscattering lidar signals from a 150–300 km altitude region with the plasma content in the nighttime F 2 layer of the ionosphere are presented. Analysis results of lidar observation data for 2008–2014 are given. A conclusion is drawn that these correlations occur...

We examined Pi2 pulsations observed simultaneously at low-latitude stations (L=1.15–2.33) around the dawn terminator. Those Pi2 pulsations observed in the sunlit region were polarized in the azimuthal (D, positive eastward) direction. We found that the D-component oscillations in the dark and sunlit regions were in antiphase, whereas the H componen...

Applying the data of VLF direction finder receiVing station of IKIR FEB RAS, included into the World Wide Lightning Location Network (WWLLN), the paper inVestigates the relations of field characteristics of recorded lightning discharges in the north-western part of the Pacific ocean with field characteristics of weather formation meteorological ele...

The paper presents the results of investigations of deformation processes in the near-surface sedimentary rocks, which have been carried out in a seismically active region of the Kamchatka peninsula since 2007. The peculiarity of the experiments on registration of geodeformations is the application of a laser strainmeter–interferometer constructed...

The paper presents the results of investigations of deformation processes in the near-surface sedimentary rocks, which have been carried out in a seismically active region of the Kamchatka peninsula since 2007. The peculiarity of the experiments on registration of geodeformations is the application of a laser strainmeter-interferometer constructed...

Data on March 2013 were used to Verify the theory of whistler propagation along a magnetic field tube, from which the recorded whistlers are expected to be associated with lightning discharges in Kamchatka and in magnetically conjugate point in Australia. When comparing the whistler rates recorded at AWDANet station in Kamchatka with lightning disc...

The correlation of lidar returns at a wavelength of 532 nm at altitudes of 150 to 300 km is investigated with the parameters of the night ionospheric F2 layer. Moreover, the role of excited ions of the nitrogen atoms in the formation of lidar signals is discussed. Findings Introduction

We investigate possible generation mechanisms of Pc1 pearl structures using multi-point induction magnetometers in Athabasca in Canada, Magadan in Russia, and Moshiri in Japan. We selected two Pc1 pulsations that were simultaneously observed at the three stations and applied a polarization analysis. In case 1, on 8 April 2010, Pc1 pearl structures...

A case study is presented using measurements from the Cluster spacecraft and ground-based magnetometers that shows a substorm onset propagating from the inner to outer plasma sheet. On October 3, 2005, Cluster, traversing an ion-scale current sheet at the near-Earth plasma sheet, detected a sudden enhancement of Bz, which was immediately followed b...

A new approach for the time-frequency analysis of acoustic emission of the audible frequency range is proposed. The approach is based on the sparse approximation method. A basis dictionary based on Berlage functions is constructed with allowance for the characteristics of geoacoustic signals. It is shown that application of the developed method in...

We present the experimental data which show that backscattered signals at the wavelength of 532 nm correlate with parameters which determine the plasma content in the nocturnal F 2 layer of the ionosphere. Based on analysis of lidar data and the geophysical situation, we discuss the hypothesis of a possible role of highly excited Rydberg atoms in t...

Numerical and analytical solutions to the problem of wave reflection in a one-dimensional medium with fractal frequency dispersion have been obtained by using the invariant-immersion method with the multiple-scattering and long-term-memory effects taken into account. As the characteristics of the medium, the solutions to the equations of the fracti...

The paper investigates possible sources of Kamchatka whistlers in March and September 2013. Applying the data from WWLLN and AWDANet worldwide networks, it is shown that statistically significant sources may be located in the global lightning centers.

We study the possible sources of Kamchatka whistlers in March and September 2013. Using these global networks WWLLN and AWDANet and methods of correlation anaziz shown that statistically significant sources are located in the global thunderstorm activity.

The results of Ionosonde data over Kamchatka during the emergence of D-layer at night are discussed. At the same time, the spectra of the night sky are represented at this period using a spectrum analyzer installed on Lidar Station of IKIR FEB RAS

We study the scattering ratio profiles obtained at the lidar station of Institute of Cosmophysical Research and Radio Wave Propagation (ICRR), Far Eastern Branch, Russian Academy of Sciences (Kamchatka) from 2007 to 2011, during the cold period of October-March. The statistically average profiles obtained in the mesosphere have well-defined maxima...

The results of geoacoustic emission investigations carried out on the seismoactive Kamchatka Peninsula since 1999 are presented. The experiments are characterized by the application of broadband piezoceramic sound receivers (hydrophones) for recording the emission. The hydrophones were installed at the bottom of natural and artificial water reservo...

The results of Rayleigh lidar sounding of the upper atmosphere over Kamchatka are analyzed in comparison with ionosonde data. A correlation between light backscattering signals at a wavelength of 532 nm and parameters determining the content of plasma in the nocturnal F2 layer of the ionosphere is found. Based on the performed analysis of lidar dat...

Lidar observations during 2007–2008 in Kamchatka revealed aerosol layers in the upper stratosphere at heights of 35–50 km and in the mesosphere at heights of 60–75 km. It is well known that forces of gas-kinetic nature, i.e., photophoretic forces, act on aerosol particles that absorb solar radiation and terrestrial IR radiation; these forces can co...

The magnetic local time and latitude dependence of amplitude of the main impulse (MI) of geomagnetic sudden commencements (SCs) and its seasonal variation have been investigated using high time resolution (1-3 sec) geomagnetic data in the latitudinal range 27-70 degrees for the period 1996-2010. The daytime distribution of the SC-MI amplitude in th...

The lidar observations, performed in Kamchatka during period from October 2007 to December 2010, are used to analyze the behavior of the vertical aerosol structure in the altitude interval of 30–80 km. The data obtained revealed a regular occurrence of the aerosol scattering during winter in the upper stratosphere and mesosphere at altitudes of 60–...

A diffusion approach was used to develop a statistical model of seismicity and to analyze Kamchatka earthquakes in order to detect features in the changes that are typical of random walk processes. We proposed a hypothesis of relationships among events and used an energy criterion to decompose the earth-quake catalog into a set of sequences, with e...

Electromagnetic pulsations in ULF range have been studied extensively using ground and satellite observations. However, how Pc 4 pulsations (6.7-22.2 mHz) propagate from the magnetosphere to the ground is not fully understand. Especially the propagation to low latitudes is unclear. We examined data obtained by the ETS-VIII satellite at the geosynch...

The formation of a substorm current wedge (SCW) is one of the fundamental processes in the expansion phase of the magnetospheric substorm [e.g. McPherron et al., 1973]. Uozumi et al. [2011] found that the ground Pi 2 timeseries had high coherencies with simultaneously observed AKR timeseries, regardless of whether the Pi 2 timeseries were associate...

An empirical model of the quiet daily geomagnetic field variation has been constructed based on geomagnetic data obtained from 21 stations along the 210 Magnetic Meridian of the Circum-pan Pacific Magnetometer Network (CPMN) from 1996 to 2007. Using the least squares fitting method for geomagnetically quiet days (Kp ≤ 2+), the quiet daily geomagnet...

The behavior of the vertical aerosol structure (profiles of the ratio of the coefficients of the backward total and molecular scattering) in the height interval 30–80 km is analyzed from the results of lidar observations in Kamchatka over the period from October 2007 through December 2009. The obtained data revealed a regular two-layer aerosol stru...

In this report we present a temporal relationship between ground Pi2 and auroral kilometric radiation (AKR). We analyzed six isolated substorm events, which were observed by the MAGDAS/CPMN ground magnetometer network and the plasma wave instrument onboard the Polar satellite. We found that the time derivative of the height-integrated AKR power and...

We have investigated Pc1 geomagnetic pulsations observed by induction magnetometers at three low-latitude stations (Paratunka (PTK), Moshiri (MSR), and Sata (STA), L=1.2–2.1). A detailed polarization analysis shows that polarization parameters (angle of polarization ellipse orientation, Ψ, and polarization sense, $\varepsilon$) of individual Pc1 ba...

DP-2 type fluctuations caused by IMF southward/northward variations have important information about how the solar wind effects are transferred into the magnetosphere, ionosphere, and on the ground. Since dayside ground magnetic field variations are significantly enhanced during DP-2 events, dayside DP-2 fluctuations have been investigated for many...

We reexamined the daily Sq-equatorial electrojet (EEJ) relationship based on these extended magnetometer networks in the east Asian region: (1) the Circum-pan Pacific Magnetometer Network (CPMN), (2) the International Real-time Magnetic Observatory Network (INTERMAGNET), and (3) the World Data Center for Geomagnetism, Kyoto (WDC). Daily variations...

The Solar-Terrestrial Environment Laboratory (STEL) induction magnetometer network has been developed to investigate the propagation characteristics of high-frequency geomagnetic pulsations in the Pc1 frequency range (0.2-5 Hz). Five induction magnetometers were installed in the period 2005-2008 at Athabasca in Canada, Magadan and Paratunka in Far...

In order to understand the electro-magnetic phenomenona in space, the Space Environment Research Center (SERC) of Kyushu University is deploying the MAGnetic Data Acquisition System of the Circum-pan Pacific Magnetometer Network (MAGDAS/CPMN). In this network, we also installed FM-CW (Frequency Modulated Continuous Wave) radars at Paratunka, Russia...

In July–October 2006 and 2007, combined measurements of geoacoustic emission in the range of 2.0–6.5 kHz, the electric field in the atmosphere near the ground, and meteorological values were carried out in Kamchatka. Using the nonparametric method of Spearman’s correlation analysis, the relationship between their average hourly values was examined....

We examined the correlation between nighttime Pi2 pulsations detected simultaneously by a frequency modulated continuous wave (FM-CW) (HF) radar and by a ground magnetometer, both located at a midlatitude (L = 2.05) Magnetic Data Acquisition System station. Eighty-three Pi2 events were observed during the 43 day period from 23 September 2006 to 4 N...

Seasonal dependence of diurnal variation of the main impulse (MI) of geomagnetic sudden commencements (SCs) has been investigated using the long-tern geomagnetic field data with high time resolution of 1 sec within a period from 1996 to 2008 provided from the NSWM [Kikuchi et al., 2008] and CPMN [Yumoto and the CPMN group, 2001] chains and the WDC...

Changes in the directionality of surface high-frequency geoacoustic emission during periods of deformational disturbances on the diurnal time scale prior to strong seismic events on Kamchatka have been investigated. It has been shown that while the emission intensity grows by over an order of magnitude, sharp maxima appear in the direction of longi...

The dynamics of aerosol layers in comparison with geomagnetic and ionospheric data has been studied based on the nighttime single-frequency lidar sounding of the atmosphere over Kamchatka at altitudes of 10 to 90 km. The relation of the aerosol density to solar, magnetic, and ionospheric activity has been studied, and the stratospheric aerosol form...

At the onset of magnetospheric substorms, Pi 2 pulsations occur globally in the magnetosphere with a period range from 40 to 150 seconds [e.g. Saito, 1968]. Pi 2 has been studied with arrays of magnetometers on the ground and with in-situ observation by satellites [e.g., Yumoto et al., 2001]. However, analysis of Pi 2 electric pulsations in the ion...

The objective of this study is to understand better the propagation of Pi 2 waves in the nighttime region. We examined Pi 2 oscillations that showed high correlation between high- and low-latitude Magnetic Data Acquisition System/Circum Pan-Pacific Magnetometer Network stations (correlation coefficient: |gamma| >= 0.75). For each horizontal compone...

We investigate nighttime medium-scale traveling ionospheric disturbances (MSTIDs) using the SuperDARN HF radar at Hokkaido, Japan (43.5°N, 143.6°E), and an OI 630-nm airglow imager located at Paratunka, Russia (53.0°N, 158.2°E), within the radar field of view. The imager identified southwestward propagating MSTIDs with a horizontal wavelength of ˜3...

On 10 September 2007 between 10:00 and 14:00 UT, the OMTI all-sky imager at Paratunka (Kamchatka, Russia, GLAT~52°) observed the onset and south-western progression of a localized depletion region in the airglow intensity. The perturbation, while being stretched in the NW-SE direction, crossed the entire field of view of the camera. During the even...

On the basis of the diffusion approach, statistical analysis of seismicity is carried out in order to reveal the peculiarities characteristic of random walk processes. In accordance with the hypothesis on connectivity of earthquakes and energetic criterion, the expansion of the seismic process into a set of sequences is made; each sequence is a Bro...