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1.
Astronomy Letters - Based on an analysis of the dynamic spectra for solar flares in the meter wavelength range obtained with the ground-based Radio Solar Telescope Network, we consider the... 相似文献
2.
V. P. Shevchenko O. S. Pokrovsky A. S. Filippov A. P. Lisitsyn V. A. Bobrov A. Yu. Bogunov N. N. Zavernina E. O. Zolotykh A. B. Isaeva N. M. Kokryatskaya V. B. Korobov M. D. Kravchishina A. N. Novigatsky N. V. Politova 《Doklady Earth Sciences》2010,430(2):228-234
New data on the elemental composition of the Severnaya Dvina River, the largest one in the White Sea region, are presented. The elemental composition of the river water in May, the period of the snowmelt flood, is similar to the upper layer of the Earth’s continental crust due to the active erosion of the earth material in the catchment area. In August, the period of the summer low water, the impact of biogenic components increases and elevated concentrations of Cd, Sb, Mn, Zn, Pb, and Cu are observed. At other times, no significant pollution by heavy and rare-earth elements is registered. 相似文献
3.
V. I. Isaev R. Yu. Gulenok O. S. Isaeva G. A. Lobova 《Russian Journal of Pacific Geology》2008,2(3):191-204
The zones of deconsolidation and consolidation in the lower parts of the sedimentary cover and in the basement are considered as an important exploration indicator of oil-gas accumulation zones. The described zones are mapped using geodensity modeling (in a gravity field) in the MZ-PZ basement and Cretaceous deposits of South Sakhalin, as well as in the pre-Jurassic basement and plate complex of the central part of West Siberia. It was found that the most promising zones are confined to the Central Sakhalin Fault and Krasnoleninsk arch in Sakhalin and to the Visim megaswell in the West Siberian plate. Recent prospecting drilling revealed that deconsolidation zones are correlated with hydrocarbon reservoirs. The presented technique of geodensity modeling can be applied for petroleum-geological explorations of structures formed in different geological and tectonic settings. 相似文献
4.
E. A. Isaeva V. F. Melnikov L. I. Tsvetkov 《Bulletin of the Crimean Astrophysical Observatory》2010,106(1):26-30
We present results suggesting that the accuracy of estimating the solar cosmic-ray (SCR) proton flux from μ-burst parameters
is much higher for proton events characterized by a low level of post-burst increase (PBI) in the μ-burst flux, a powerful
decametric (DCM) component, and a small time shift (Δt < 9 min) of the DCM burst maximum relative to the μ-burst maximum. These three parameters are probably related between themselves,
since events characterized by a small Δt have a very low PBI level. We show that the accuracy of estimating the proton flux depends to a greater extent on Δt than on the intensity of the DCM component. For approximately half of the events from the investigated sample, the accuracy
of estimating the proton flux approaches the maximum possible accuracy from μ-burst parameters. 相似文献
5.
The relationship between the proton intensity in the interplanetary space and radio bursts of type II for 78 proton events
for the period of 1989–2005 is studied based on the data of the Radio Solar Telescope Network. Two families of events have
been revealed in plots describing the dependence of the intensity of protons with different energies and the rate of the frequency
drift of meter-decameter radio bursts. This suggests the generation of shock waves both in the region of flare energy release
and at the fronts of coronal mass ejection. 相似文献
6.
The statistical relationship between activity complex (ACs) on the Sun and solar flares with GOES X-ray classes higher than M1.0 (744 events) is analyzed for the 24th solar-activity cycle (before January 2019). All groups of sunspots are divided into three classes, corresponding to those in cores and branches of ACs and those outside of ACs. It is shown that 78% of the flares considered occur predominantly in groups of sunspots in AC cores and branches. The specific number of flares in AC cores exceeds the corresponding number in AC branches and outside of ACs by a factor of 2.5. 87% of LDE flares of the indicated classes, 82% of all strong proton flares generating fluxes of energetic protons at the Earth’s orbit, and 74% of all gamma-ray flares in Cycle 24 were associated with ACs. 相似文献
7.
On the basis of data from the Radio Solar Telescope Network (RSTN), as well as the Geostationary Operational Environmental Satellite (GOES) and the WIND spacecraft, for the period from 1989 to 2006 covering 107 flare events, we investigated the relationship between the intensity of solar cosmic rays and parameters of continuum radio bursts (25?C15400 MHz), as well as type II radio bursts in the meter and decahectometer wavelength ranges. Proton fluxes with energies E p > 1?100 MeV were calculated with regard to a reduced heliolongitude. The maximum correlation between solar cosmic rays and solar parameters of microwave bursts was 0.80. Its value was no more than 0.40 for the drift rate of type II bursts and 0.70 for the compression rate of coronal shock waves. Based on linear regression equations, we estimated the contribution of coronal shock waves to the acceleration of protons. We found that major acceleration processes occur in the area of burst energy release and complimentary processes occur at the fronts of coronal shock waves. The contribution of the latter to the acceleration process increases significantly with proton energy. 相似文献
8.
The correlation between the proton flux intensity I p with the energies E p > 1?100 MeV and radio burst parameters for 107 solar energetic events is considered using the observation data for 1989?C2005 obtained with GOES and Wind satellites, as well as the Radio Solar Telescope Network (RSTN). It has been revealed that 73 and 77% of the events were accompanied by type-II radio bursts in the meter (m II, 25?C299 MHz) and the decameter-hectometer (DH II, 20 kHz?C14 MHz) wavelength ranges, respectively. The correlation coefficient between I p and the frequency drift velocity of the type-II bursts V II did not exceed 0.40. As V II increased, the intensity of I p increased for the m-II bursts and decreased for the DH-II bursts. Coronal shock waves accelerate protons more efficiently than interplanetary waves, and their contribution to acceleration increases with an increase in the particle energy E p . The acceleration of solar energetic particles in the region of the flare energy release is predominant. 相似文献
9.
Geomagnetism and Aeronomy - Based on observations in the Hα and extreme ultraviolet lines, as well as in the radio and X-ray wavelengths, we study the eruptive events of September 22 and 24,... 相似文献
10.
Ledneva G. V. Isaeva E. P. Sokolov S. D. Bazylev B. A. Boldyreva A. I. 《Doklady Earth Sciences》2022,505(1):446-451
Doklady Earth Sciences - The timing of intraplate magmatism in Western Chukotka manifested in the formation of gabbroic rocks of the Anyui plutonic complex of the Anyui–Chukotka fold belt is... 相似文献